Prof. Dr. SUNIL K NARAYAN

Prof. Dr. SUNIL K NARAYAN

Research Dean / Neurology
Department : Neurology
Email :

Introduction:

After a reasonably active school education period, in rural schools, noteworthy by national scholarships, state rank at school leaving, first Kerala State Sastragathi first prize team member 1974 and first Kerala state science fair Quiz first prize in 1976 and University first rank in university premedical courses, my primary medical education was at the State Government medical colleges of the most literate and population-dense state of India, Kerala, at Calicut and Trivandrum Medical colleges, where I was fifth in a batch of 201 MBBS students and first in the rank of 4 MD students. I then was trained in Neurology and had a post DM training too during the period of 1990-94 at SCTIMST, Trivandrum, Kerala, an Institute of National Importance under Departments of Science & Technology and Biotechnology, Government of India. Thereafter, I started career as Assistant Professor in Neurology at Sri Venkateswara Institute of Medical Sciences at Tirupati, in Andhrapradesh and then joined JIPMER, another excellent teaching institute, in public sector, which till late, focused primarily in UG training, as associate Professor and Head of Neurology in 2000.

Build up the department to the state of- the-art Neurology training centre, with excellent muti-disciplinary Neurology clinical services including outpatient and special clinic services, Intensive care unit and a rehabilitation ward and stroke unit. I also founded the DM Neurology, BSC and MSc Neurotechnology and PhD and Post Doctoral Clinical Fellowship courses in Stroke and Epilepsy with comprehensive Neuroscience centre facilities including neuromodulation and neurobiology laboratories, ably complimented by the supportive basic medical training and laboratory and service infrastructure. During my services, also did a PhD in Neurogenetics/metabolomics and Pharmacology through a commonwealth scholarship jointly at the centre for Life Newcastle, UK and JIPMER. I trained 8 PhDs including the 3 in Neurosciences, 28 DM Neurologists, and guided 16 DM theses, 2 MCh theses and 14 MD theses; I have 108 indexed papers with 1733 citations; h-index 24 and i10 Index of 45 (GS)/14(WOS/SCOPUS); and have had a total extramural research grant of total > 2.5 crores. Supported the institute and Indian Health Ministry’s various functionaries in multiple capacities in various advisory bodies, while remaining focused in research and department building.

With a primary interest in stroke and degenerative diseases, I built up a comprehensive stroke care centre at JIPMER, with an acute stroke code activation based acute stroke care unit with thrombolysis and mechanical thrombectomy programmes; cerebrovascular doppler; Autonomic function testing; and CT and MRI and SPECT and biplane DSA based Neurovascular labs, Neurorehabilitation facility including robotics, computerized cognitive and neuromodulation applications, over a career span of 25 years of service at JIPMER, making it easily the department with the best comprehensive lab infrastructure in India. This was made possible due to the multiple short trainings I got in various international laboratories with experts around the world during the early years after Neurology qualification through several travel grants.

I have also been active in the national front in the stroke specialty and has become the chairman of the stroke subsection of Indian academy of Neurology last two years, having served as its convenor for previous 6 years. I have been an active contributor of the India specific National Stroke guidelines 2019, developed by the DGHS of the ministry of Health and Family Welfare, whose second version is now being developed. Worked with autistic children at special schools in Pondicherry and won the Neurorehabilitation initiative of the year 2024 award of the Indian academy of Neurology this year. I was the Tamil Nādu Academy of Neurology Executive member, Vice-president and then the President too. I am currently also the convener for the Tropical Neurology subsection of India.

I have a special passion for development of health care products in India either novel in concept or design or lower in cost compared to international products and to make it in India for the world, which aligns well the current Government’s national goals. I myself is the discoverer of two Indian patents of important neurological applications in comatose patients and in those with nerve repair and was also the supervisor for the first successful medical student patentee of the institute and 4 of my Neurology trainees have won AAN international scholarships/ Erasmus Mundus European mobility travel grants. I have also received provisional patent registration for a low-cost technology producing stem-cell derived exosomes in India. I also was the PI for a national multicentric trial of thrombectomy in stroke using a low-cost cerebrovascular stent developed by Indian scientists in the US whose results were presented at WSC at Barcelona and has received licensing from DCGI for marketing in India. This stent made of an alloy; Nitinol is going to be made in India in Hyderabad by Ms. Gurutva enterprises from February 2026 onwards. We also researched on several protocols for the non-invasive brain stimulation techniques in stroke rehabilitation and showed the superiority of a TMS based protocol over tDCS, combined and placebo stimulations, a paper well-received at American Academy of Neurology national conference 2025, San Diego and at the Brain stimulation

Educational Qualifications:

Degree Year Name of College & University Registration number with
date of registration		 Name of State Medical council
MBBS 1983 Calicut, Calicut University 13510/1984/TCMC
DCH 1988 Trivandrum, Kerala University
MD 1989 Trivandrum, Kerala University
DM (Neurology) 1994 SCTIMST (INI)
DNB (Neurology) 1994 National Board of Medical Examinations
Postdoctoral Fellowship (Stroke)* 1996* Edinburgh University, UK
PhD (Interdisciplinary- 2013 JIPMER (INI); One year of PhD research at Newcastle University, UK

Details of Teaching experience till date:

Designation Department Institution From To Total
Head of the department and Professor (Senior Grade-INI) Neurology JIPMER, Pondicherry 1.1.2023 Till Date 3 years 7 months 13 days
Professor (Senior Grade-INI) Neurology JIPMER, Pondicherry 1.7.2017 31.12.2022 5 years 6 months
Professor (INI) Neurology JIPMER, Pondicherry 1.7.2010 30.6.2017 7 years
Professor (CHS) Neurology JIPMER, Pondicherry 1.5.2004 11.7.2009 5 years 2 months 10 days
Addl Professor (INI) Neurology JIPMER, Pondicherry 12.7.2009 30.6.2010 11 months 18 days
Associate Professor and Head Neurology JIPMER, Pondicherry 1.11.2000 30.4.2004 3 years 6 months
Associate Professor of Neurology Neurology JIPMER, Pondicherry 1.5.2000 31.10.2000 6 months
Assistant Professor Neurology SVIMS, Tirupati 20.6.1995 30.4.2000 4 years 10 months 10 days
Research Fellow (On sabbatical) Neurology University of Edinburgh, UK 1.1.1996 30.4.1996 4 months
Research Fellow and Lecturer (On sabbatical) Neurology University of Manchester, UK 20.12.1996 5.4.1997 3 months 16 days
PG Senior Resident Neurology SCTIMST, Trivandrum 1.1.1991 15.1.1994 3 years 14 days
Non-PG Senior Resident Neurology GB Pant Hospital, New Delhi 5.3.1990 27.12.1990 9 months 22 days
Assistant Professor of Paediatrics Neurology PSG Institute of Medical Sciences, Coimbatore 5.8.1989 28.2.1990 6 months 23 days
Before Post graduation (MD Junior resident: Teaching of UGs in Paediatrics) Neurology Medical College, Trivandrum, Kerala 1.6.1986 31.5.1989 3 years

ADMINISTRATIVE EXPERIENCE

  • Dean of Research, Jawaharlal Institute of Postgraduate Medical Education and Research, Pondicherry since 27.09.2025
  • Head of Department of Neurology, Jawaharlal Institute of Postgraduate Medical Education and Research, Pondicherry: Since 1st November 2000 till Date (Except during a span of 1.1.2017 to 31.12.2018 during rotation of heads which is an institute policy)
  • President, JIPMER Scientific society:1.1.2019 to 31.12.20194.
  • President-Elect TAN: 1.1.2021 to 31.12.20215.
  • President TAN: 1.1.2022 to 31.12.20226.
  • Convener, Stroke Subsection, Indian Academy of Neurology 2012-20217.
  • Chairman, Stroke subsection of Indian Academy of Neurology 2022-2023
  • UGC, AANCON 2014, San Diego April 2013
Research & Publications :
  • Yavagal DR, Gaikwad SB, Vibha D, Narayan SK, Nagarajan K, Kesavarupu SR, Sharma MK, Sharaf R, Vankayalapati S, Mehta A, Das D, Doshi D, Oak P, Salunkhe M, Jankowitz B, Rai AT, Brown SB, Zaidi SF, Asif KS, Liebeskind DS, Jovin TG, Pandian J, Jadhav AP, Atchaneeyasakul K, Desai S, Giragani S; GRASSROOT Trial investigators; GRASSROOT trial investigators GRASSROOT Trial investigators. Mechanical thrombectomy for acute ischemic stroke in a low- and middle-income country: primary outcomes from the GRASSROOT Trial. J Neurointerv Surg. 2025 Dec 10:jnis-2025-024470. doi: 10.1136/jnis-2025-024470. PMID: 41371775.
  • Narayan SK, Gorman G, Kalaria RN, Ford GA, Chinnery PF. The minimum prevalence of CADASIL in northeast England. Neurology. 2012 Mar 27; 78(13):1025-7. doi: 10.1212/WNL.0b013e31824d586c; PMID: 22422895. (IF: 8.4; Cited in 152 papers)
  • Bond R, Narayan SK, Rothwell PM, Warlow CP; European Carotid Surgery Trialists' Collaborative Group. Clinical and radiographic risk factors for operative stroke and death in the European carotid surgery trial. Eur J Vasc and Endovasc Surg. 2002 Feb; 23 (2):108-16. doi: 10.1053/ejvs.2001.1541; PMID: 11863327 (IF 6.8, 5-yr IF: 6.5; Cited in 136 papers)
  • Prakash ES, Madan Mohan, Sethuraman KR, Narayan SK. Cardiovascular autonomic regulation in subjects with normal blood pressure, high-normal blood pressure and recent-onset hypertension. Clin Exp Pharmacol Physiol. 2005 May-Jun; 32(5-6):488-94. doi: 10.1111/j.1440-1681.2005.04218.x. PMID: 15854164. (IF 2.5; CiteScore:5.5; Cited in 89 papers)
  • Kesavan R, Narayan SK, Adithan C. Influence of CYP2C9 and CYP2C19 genetic polymorphisms on phenytoin-induced neurological toxicity in Indian epileptic patients. Eur J Clin Pharmacol. 2010 Jul; 66(7):689-96. doi: 10.1007/s00228-010-0817-2; PMID: 20390258. (IF 2.7;5-year IF: 2.7; Cited in 75 papers)
  • Abdul Mannan Laskar, Deepashree R, Prasanna Bhat, Biju Pottakkat, Sunil K Narayan, Apurba Sastry, R Sneha. A multimodal intervention to improve hand hygiene in a tertiary care center. May 2018. American Journal of Infection Control 46(7). DOI: 10.1016/j.ajic.2017.12.017; PMID: 29753498 (IF:2.4; Cite Score: 7.9; Cited in 70 papers)
  • Mekala S, Paplikar A, Mioshi E, Kaul S, Divyaraj G, Coughlan G, Ellajosyula R, Jala S, Menon R, Narayanan J, Narayan S, Aghoram R, Nehra A, Rajan A, Sabnis P, Singh SK, Tripathi M, Verma M, Saru LV, Hodges JR, Alladi S. Dementia Diagnosis in Seven Languages: The Addenbrooke's Cognitive Examination-III in India. Arch Clin Neuropsychol. 2020 Jul 24;35(5):528-538. doi: 10.1093/arclin/acaa013. PMID: 32188967. (IF: 2.1, 5-year IF: 2.6, Cites score: 4.7; Cited in 66 papers)
  • Saibaba J, Gomathy SB, Senthilvelan S, Sugumaran R, Narayan SK. Expanding the Clinico-Genetic Scope of Bethlem Myopathy: A Family of Five Patients from Kerala. Ann Indian Acad Neurol. 2025 Sep 3. doi: 10.4103/aian.aian_146_25. Epub ahead of print. PMID: 40900223.
  • Saibaba J, Gomathy SB, Sugumaran R, Narayan SK. A young woman with ataxia, seizures and myoclonus. Pract Neurol. 2025 Oct 29:pn-2025-004821. doi: 10.1136/pn-2025-004821. Epub ahead of print. PMID: 41167608
  • Saibaba J, Gomathy SB, Sugumaran R, Narayan SK. Progressive Supranuclear Palsy or Something More? Unveiling Late-Onset Wilson's Disease. Ann Indian Acad Neurol. 2025 Dec 6. doi: 10.4103/aian.aian_795_25. PMID: 41355003
  • Sugan SS, Gomathy SB, Azharudeen M, Narayan SK, Sugumaran R. Atypical Anti-NMDAR encephalitis presenting with pharyngeal-cervical-bibrachial weakness: A rare case report. Neurol Sci. 2025 Sep 3. doi: 10.1007/s10072-025-08455-6. Epub ahead of print. PMID: 40900256.
  • Subramanian VK, Gomathy SB, Sugan SS, Sugumaran R, Narayan SK. Shaky Beginnings: A Novel CoQ8A Mutation in Adolescent-Onset Cerebellar Ataxia with Head Tremors. Ann Indian Acad Neurol. 2025 Jun 28. doi: 10.4103/aian.aian_247_25. (IF: 1.8)
  • Saibaba J, Narayan SK, Sugumaran R, Gomathy SB, Mallikarjuna M, Amalnath D. Clinicogenetic profile of case series of six Tamilian chorea-acanthocytosis families with VPS13A mutations from South India. Parkinsonism and Relat Disord. 2025 Jun 16;137:107917. PMID: 40652927; DOI: 10.1159/000547133. (IF 3.4; Cite score: 6.0)
  • Sylaja PN, Nambiar V, Narayan S, P R J, Kumar CS, Nk P, Menon MM, Berieau VB, Nair D, Dhasan A, Arora D, Verma SJ, Sharma M, Dhaliwal RS, Sarma PS, Pandian JD. Ayurvedic Treatment in the Rehabilitation of Ischemic Stroke Patients in India: A Randomized Controlled Trial (RESTORE). Int J Stroke. 2025 Jun 6:17474930251349727. (IF 8.7; 5-yr IF: 6.9)
  • Raju PS, Verma SJ, Dhasan A, Arora D, Pandian JD, Nambiar V, Narayan S, Babu V, Sharma M, Sylaja PN. Ayurvedic Treatment in the Rehabilitation of Ischemic Stroke Patients in India: A Randomized Controlled Trial (RESTORE) - Findings from the Process Evaluation. Cerebrovasc Dis. 2025 Jul 12:1-12. doi: 10.1159/000547133. PMID: 40652927. (IF 1.5; 5 yr IF: 2.2; Citescore: 4.6)
  • Verma SJ, Karuthedathu Mana Sanal Kumar AD, Arora D, Dhasan A, Sylaja PN, Khurana D, Vijaya P, Ray BK, Nambiar V, Aaron S, Mittal GK, Pai AR, Kumaravelu S, Reddy YM, Narayan S et al. Comparing Stroke Profiles and Outcomes between Urban and Rural India: A Secondary Analysis of the SPRINT INDIA Trial. Cerebrovasc Dis. 2025 Apr 16:1-11. doi: 10.1159/000545675. Epub ahead of print. PMID: 40239637. ((IF 1.5; 5 yr IF: 2.2; Citescore: 4.6)
  • Kumaravelu S, Verma SJ, Arora R, Arora D, Devi KA, Dhasan A, Sylaja PN, Khurana D, Vijaya P, Ray B, Nambiar V, Aaron S, Mittal G, Nagarjunakonda S, Pai A, Reddy YM, Narayan S, Borah N, Das R, Kulkarni G, Huded V, Mathew T, Srivastava MVP, Bhatia R, Ojha P, Roy J, Abraham S, Vaishnav A, Sharma A, Jabeen SA, Pathak A, Bhoi S, Sharma S, Sulena S, Saroja AO, Ramrakhiani N, Kempegowda MB, Gorthi S, Kate M, George T, Sebastian I, Sharma M, Dhaliwal R, Huilgol R, Pandian JD. SPRINT INDIA: Regional Variations in Primary and Secondary Stroke Outcomes Based on Baseline Characteristics in North and South Indian Sites. Ann Indian Acad Neurol. 2025 May 7. doi: 10.4103/aian.aian_792_24. PMID: 40335450. (IF: 1.8)
  • Verma SJ, Kaur G, Devi A, Arora D, Dhasan A, Sylaja PN, Khurana D, Pamidimukkala V, Ray BK, Nambiar V, Aaron S, Mittal G, Nagarjunakonda S, Pai AR, Gorthi SP, Kumaravelu S, Reddy YM, Narayan S, Borah NC, Das R, Kulkarni GB, Huded V, Mathew T, Srivastava MP, Bhatia R, Ojha PK, Roy J, Abraham SM, Vaishnav AG, Sharma A, Jabeen S, Pathak A, Bhoi SK, Sharma S, Sulena S, Saroja AO, Ramrakhiani N, Kempegowda MB, Kate M, George T, Sebastian I, Sharma M, Dhaliwal R, Huilgol R, Pandian JD. Educational and Socioeconomic Correlates of Stroke Risk Behaviors: Findings from the SPRINT INDIA Trial. Ann Indian Acad Neurol. 2025 May 19. doi: 10.4103/aian.aian_933_24. PMID: 40387006. (IF: 1.8)
  • Saravanan S, Aghoram R, Narayan SK, Saibaba J, Madhan R. Central nervous system vasculopathy: inherited or acquired? The DADA2 conundrum. Pract Neurol. 2025 Jan 8:pn-2024- 004441. doi: 10.1136/pn-2024-004441. PMID: 39778928 (IF:2.3; Citescore:3.3)
  • Sugumaran R, Bhuvaneswaran R, Saibaba J, Narayan SK, Sundarraj SK, Pandit N. The Usefulness of 131 I-MIBG Myocardial Scintigraphy in a Case of Pure Autonomic Failure - First Report in the Literature. Ann Indian Acad Neurol. 2025 May 1;28(3):445-447. doi: 10.4103/aian.aian_990_24. Epub 2025 Apr 7. PMID: 40195057
  • Pazhani P, Gomathy SB, Gopalakrishnan MS, Saibaba J, Manyem M, Sugumaran R, Narayan SK. Ventriculoperitoneal Shunt Overdrainage Manifesting as Rapidly Evolving Cognitive Decline - A Rare Complication. Ann Indian Acad Neurol. 2025 Jan 29. doi: 10.4103/aian.aian_621_24. PMID: 39878428 ((IF: 1.8)
  • Pazhani P, Gomathy SB, Saibaba J, Manyem M, Sugumaran R, Narayan SK. All Tongue Fasciculations are Not Motor Neuron Disease. Ann Indian Acad Neurol. 2025 Jan 10. doi: 10.4103/aian.aian_690_24. PMID: 39794281 (IF: 1.8)
  • Sugumaran R, Sai Krishna KS, Saibaba J, Narayan SK. Response to "Letter to the Editor regarding 'Parkinson's Disease: News on the Action of Melatonin' by Scorza et al.". Sleep Med. 2025 Jun;130:13-14. doi: 10.1016/j.sleep.2025.03.005. Epub 2025 Mar 12. PMID: 40101350
  • Sugumaran R, Bhuvaneswaran R, Saibaba J, Narayan SK, Sundarraj SK, Pandit N. The Usefulness of 131I-MIBG Myocardial Scintigraphy in a Case of Pure Autonomic Failure - First Report in the Literature. Ann Indian Acad Neurol. 2025 Apr 7. doi: 10.4103/aian.aian_990_24. PMID: 40195057 (IF: 1.8)
  • Bhuvaneswaran R, Saibaba J, Sugumaran R, Narayan SK, Kumar D. Iatrogenic breathing arm syndrome. Neurol Sci. 2025 Apr 29. doi: 10.1007/s10072-025-08203-w. MID: 40299243. (IF 2.4; 5-yr IF 2.5)
  • Pandian JD, Phillips A, Verma SJ, ……., Narayan S et al, Indian Trial of Tranexamic acid in Spontaneous Intracerebral Haemorrhage (INTRINSIC TRIAL) Study Protocol. Int J Stroke. 2024 Dec 5:17474930241307933. doi: 10.1177/17474930241307933. PMID:39633570. ((IF 8.7; 5-yr IF: 6.9)
  • Sugumaran R, Sai Krishna KS, Saibaba J, Narayan SK, Sandhiya S, Rajeswari M. Melatonin on sleep in Parkinson's disease: A randomized double blind placebo controlled trial. Sleep Med. 2024 Oct 19;124:502-509. doi: 10.1016/j.sleep.2024.10.020. PMID: 39437460. (IF:3.4; Citesscore: 7.0)
  • SPRINT INDIA trial collaborators. Secondary prevention with a structured semi-interactive stroke prevention package in INDIA (SPRINT INDIA): a multicentre, randomised controlled trial. Lancet Glob Health. 2023 Mar;11(3):e425-e435. doi:10.1016/S2214-109X(22)00544-7.PMID:36796986. (IF 13; Cites score:31)
  • Bharath J, Amuthabharathi M, Sivasubramaniyan KM, Adithan S, Narayan SK, Sunitha VC, Nagarajan K. Clinicoradiological features of cerebral microbleeds diagnosed on magnetic resonance neuroimaging. J Neurosci Rural Pract. 2024 Apr-Jun;15(2):300-306. doi: 10.25259/JNRP_331_2023. Epub 2024 Mar 20. PMID: 38746508. (IF:0.9;Cites score:1.8)
  • Arumugham S, Narayan SK, Aghoram R. Effect of continuous 2 MHz transcranial ultrasound as an adjunct to tenecteplase thrombolysis in acute anterior circulation ischemic stroke patients: an open labeled non-randomized clinical trial. J Thromb Thrombolysis. 2024 Feb 23. doi: 10.1007/s11239-023-02922-7. PMID: 38393673 (IF 2.2; 5-yr IF: 2.2)
  • Saibaba J, Narayan SK, Sugumaran R. 'Ear of the lynx' sign: hereditary spastic paraplegia (HSP) type 11. Pract Neurol. 2024 Sep 13;24(5):434-435. doi: 10.1136/pn-2024-004115. PMID: 38886050. (IF:2.3; Citescore:3.3)
  • Sugumaran R, Bhuvaneswaran R, Narayan SK. Autosomal recessive spastic ataxia of charlevoixsaguenay (ARSACS)-first with tongue wasting, peripheral nerve thickening and a novel SACS gene mutation. Acta Neurol Belg. 2024 Aug 29. PMID: 39198354 (IF:2.4;5-yr IF:2.3)
  • Rani A, Sugumaran R, Narayan SK. Lack of habituation of visual-evoked potential in the interictal period is not a consistent neurophysiological marker of migraine: A cross-sectional analytical study. J Neurosci Rural Pract. doi: 10.25259/JNRP_33_2024 . (IF:0.9;Cites score:1.8)
  • Sridhar D, Ramamoorthy L, Narayan SK, Amalnath D, Lalthanthuami HT, Ganapathy S, Puliyakkuth U. Effectiveness of nurse-led fever, sugar-hyperglycemia, and swallowing bundle care on clinical outcome of patients with stroke at a tertiary care center: A randomized controlled trial. J Neurosci Rural Pract. 2024 Apr-Jun;15(2):255-261. doi: 10.25259/JNRP_446_2023. PMID: 38746518. (IF:0.9;Cites score:1.8)
  • Cherian SG, Narayan SK, Arumugam M. Exosome therapies improve outcome in rodents with ischemic stroke; meta-analysis. Brain Research, 2023. 1803 (148228). ISSN 0006-8993. PMID: 36592803 https://doi.org/10.1016/j.brainres.2022.148228. (IF:4.8;Cites Score2.6)
  • Ye Z, Busse JW, Hill MD, Lindsay MP, Guyatt GH, Prasad K, Agarwal A, Beattie C, Beattie J, Dodd C, Heran MKS, Narayan S, Chartúir NN, O'Donnell M, Resmini I, Sacco S, Sylaja PN, Volders D, Wang X, Xie F, Zachrison KS, Zhang L, Zhong H, An Z, Smith EE. Endovascular thrombectomy and intravenous alteplase in patients with acute ischemic stroke due to large vessel occlusion: A clinical practice guideline. J Evid Based Med. 2022 Sep;15(3):263-271. doi: 10.1111/jebm.12493. 2022 Sep 19. PMID: 36123777. (IF: 3.5; Cites score:5.1)
  • Ramakrishnan K, Kesavan R, Venkatraman S, Narayan SK, Kumar RR, Shewade D. Impact of CYP2C9*2 and *3 polymorphisms on valproate-associated adverse drug reactions in individuals living with epilepsy: a case-control study. Journal of Per Med. 2023 Sep;20(5):417-424. doi: 10.2217/pme2023-0033. PMID: 37811569. (Cites score:6)
  • Nitheesha V, Rao JSM, Reddy M, Nagarajan K, Narayan SK, Kandasamy P, Chandrasekharan V. Clinicoradiological Profile of Incomplete Hippocampal Inversion Diagnosed on MR Neuroimaging. Neurol India. 2023 Nov-Dec;71(6):1211-1216. doi: 10.4103/0028-3886.391380. PMID: 38174460. (IF 0.8)
  • Jayan J, Narayan SK, Haniffa YN, Kumar N. Somatosensory evoked potentials amplitude is enhanced after non-invasive brain stimulation in chronic ischemic stroke: Preliminary results from a randomised control trial. J Stroke Cerebrovasc Dis. 2023 Nov 9;33(1):107418. doi: 10.1016/j.jstrokecerebrovasdis.2023.107418. PMID: 37951083. (IF: 1.8; Cites score:4.0)
  • Ragavendar B, Sugumaran R, Narayan SK, Srinivas BH. Chronic inflammatory axonal polyneuropathy with myositis: a rare presentation. Acta Neurol Belg. 2023 Apr 3. doi: 10.1007/s13760-023-02256-4. PMID: 37010789. (IF:2.4; 5-yr IF:2.3)
  •  Sarma P, Khatter H, Dhasan A, et al. Statistical Analysis Plan (SAP) for AyuRvedic TrEatment in the Rehabilitation of Ischemic STrOke Patients in India: A Randomized Controlled Trial. (RESTORE). Journal of Stroke Medicine. 2023;6(1):52-58. doi:10.1177/25166085231176172
  • Sylaja PN, Pr J, Kate MP, Dhasan A, Nambiar V, Narayan S, Renjith V, Arora D, Verma SJ, Sharma M, Rs D, Khatter H, Sarma PS, Pandian JD. Ayurvedic Treatment in the Rehabilitation of Ischemic Stroke Patients in India: A Randomized Controlled Trial (RESTORE) study protocol. Cerebrovasc Dis. 2023 Apr 6. doi: 10.1159/000530546. PMID: 37023741 . (IF 1.5; 5 yr IF: 2.2; Citescore: 4.6)
  • Manjubashini D, Nagarajan K, Amuthabarathi M, Papa D, Wadwekar V, Narayan SK. Magnetic Resonance Imaging in Peripartum Encephalopathy: A Pictorial Review. J Neurosci Rural Pract. 2021 Apr;12(2):402-409. doi: 10.1055/s-0041-1727300. Epub 2021 Apr 23. PMID: 33927531; PMCID: PMC8064849. (IF:0.9;Cites score:1.8)
  • Kate MP, Arora D, Verma SJ, et al. On behalf of SPRINT INDIA Collaborators. Secondary Prevention by Structured Semi-Interactive Stroke Prevention Package in India (SPRINT INDIA) study protocol. International Journal of Stroke. 2020;15(1):109-115. doi:10.1177/1747493019895653. PMID: 31852411. (IF 8.7; 5-yr IF: 6.9)
  • Elavarasi, SK Narayan, S Parameswaran, D Gocchait. Carotid Occlusion Associated With Eosinophilia and Proteinuria: Potential Diagnostic Clues or Red Herrings? Journal of Stroke Medicine 2022 June, 5(1): 85-90. doi:10.1177/25166085221082433
  •   Elavarasi, Narayan SK, Saichandran . Bilateral Carotid Stenosis in a Patient with Previous Neck Surgery: Difficulties in Endarterectomy. Journal of Stroke Medicine. 2022 June;5(1):69-70. doi:10.1177/25166085221082410
  •   Narayan SK, Jayan J, Arumugam M. Short-term Effect of Non-invasive Brain Stimulation Techniques on Motor Impairment in Chronic Ischemic Stroke: A Systematic Review with Meta- Analysis. Neurol India 2022;70:37-49. PMID: 35263851 (IF: 0.9)
  •   Pandian JD, Verma SJ, Arora D, Sharma M, Dhaliwal R, Khatter H…Narayan S.. et al; INSTRuCT: Protocol, Infrastructure, and Governance. Stroke. 2021 Jun 25 (10):574-580. PMID: 34167324. (IF 10.17;5-yr IF:9.9)
  •   Goel Atul, Narayan, Sunil, Sugumaran, Ramkumar. Neuropsychiatric features, health-related quality of life, and caregiver burden in parkinson’s disease. 2022 Nov 1. Annals of Indian Academy of Neurology; 25(6) 1147-1152. PMID: 36911463 (IF: 1.8)
  • Goel A, Narayan SK, Sugumaran R. A telephonic survey of health-related quality of life of outpatient department dropout Parkinson's disease patients during the COVID-19 pandemic. Acta Neurol Belg. 2022 Feb 17:1-5. PMID: 35175569 (IF:2.1;5-yr IF: 2.3)
  • Panicker G, Kaliaperumal S, Narayan S, Mani M. Glaucoma and optical coherence tomography changes in migraine: A comparative cross-sectional study. Indian J Ophthalmol 2021;69:3546-51. PMID: 34826993 (IF 1.8)
  • Done IP, Aghoram R, Narayan SK. Everyday Abilities Scale for India in Screening for Poststroke Dementia Among Young Stroke Survivors. Alzheimer Dis Assoc Disord. 2021 Jul-Sep. 01;35(3):275-277. PMID: 33973879 (IF 1.4)
  • Aghoram R, Wadwekar V, Narayan SK, Nair PP, Ramkumar S, Jain S. Neurology Exams during the COVID-19 Pandemic. Ann Indian Acad Neurol. 2021 Jul-Aug;24(4):626-627. PMID: 34728977. (IF 1.8)
  • Priya DI, Aghoram R, Narayan SK. Neuropsychiatric symptoms among young stroke survivors frequency, patterns, and associated factors. Neurol Sci. 2021 Dec;42(12):5021-5027. PMID: 33733388. (IF:2.4; 5-yr IF: 2.3)
  • Mani B, Nair PP, Sekhar A, Kamalanathan S, Narayan SK, Kesavan R. CYP2C19 & UGT1A6 genetic polymorphisms and the impact on Valproic acid-induced weight gain in people with epilepsy: Prospective genetic association study. Epilepsy Res. 2021 Nov;177:106786.PMID:34656038. (IF:2.0; Cites score: 4.4)
  •   Mohan AB, Adithan S, Narayan S, Krishnan N, Mathews D. Evaluation of White Matter Tracts Fractional Anisotropy Using Tract-Based Spatial Statistics and Its correlation with Amyotrophic Lateral Sclerosis Functional Rating Scale Score in Patients with Motor Neuron Disease. Indian J Radiol Imaging. 2021 Apr;31(2):297-303. DOI: 10.1055/s-015-61893; PMID: 34556911 (IF=1.0)
  •  Atul Goel, Sugumaran R, Narayan SK. Zonisamide in Parkinson's disease: a current update. Neurol Sci. 2021 Aug 27. doi: 10.1007/s10072-021-05550-2. b ahead of print. PMID: 34448999. (IF:2.4; 5-yr IF: 2.3)
  •  Narayan SK, Grace Cherian S, Babu Phaniti P, Babu Chidambaram S, Rachel Vasanthi AH, Arumugam M. Preclinical animal studies in ischemic stroke: Challenges and some solutions. Animal Model and Experimental Medicine. 2021 Apr 23;4(2):104-115. doi: 10.1002/ame2.12166. eCollection 2021 Jun. PMID: 34179718. (IF 3.4; Cites score: 5.8)
  • Narayan S, Chandrasekaran A, Basu D, Hanumanthappa N, Aghoram R, Dutta TK, Rejul V. Prothrombotic Factors have Significant Association with Arterial and Venous Strokes in Indian Tamilians. J Appl Lab Med. 2020 Dec 12:jfaa198. doi: 10.1093/jalm/jfaa198. PMID: 3313850 (IF:1.9)
  • Das AM, Ramamoorthy L, Narayan SK, Wadvekar V, Harichandrakumar KT. Adherence to Antiepileptic Regime: A Cross-sectional Survey. Neurol India. 2020 Jul-Aug;68(4):856-860. doi: 10.4103/0028-3886.293468. PMID: 32859828 (IF 0.9)
  • Ramaswamy G, Premarajan KC, Kar SS, Narayan SK, Thekkur P. Prevalence and determinants of sleep disorders in a community in rural southern India. Natl Med J India. 2020 May-Jun;33(3):132-136. doi: 10.4103/0970-258X.314002. PMID: 33904415 (IF 0.6, Cites score:0.5)
  • Sugumaran R, Narayan SK, Goel A, Kundra P. Cord injury after spinal block for caesarean section. Pract Neurol. 2021 Jun;21(3):264-265. practneurol-2020-002760. doi: 10.1136/practneurol-2020-002760. PMID 727243. (IF 2.3;Cites Score: 3.3)
  • Menon B, Narayan SK, Bhade S. COVID-19, Moral Injury and the Bhagvad Gita. J Relig Health. 2021 Feb 26:1–9. doi: 10.1007/s10943-021-01210-z. PMID: 33635446; PMCID: PMC7908940. (IF 2.0; 5- yr IF: 2.4)
  • Indira Priya D, Sugumaran R, Sunil K Narayan, Supriya C. Bobble-head doll syndrome with suprasellar arachnoid cyst. Pract Neurol. 2020 Oct 22:practneurol-2020-002666. doi: 10.1136/practneurol-2020-002666. PMID: 33093183. (IF 2.3;Cites Score: 3.3)
  • Elavarasi A, Narayan SK, Parameswaran S, Srinivas BH, Mani B. Stroke in a Young Man with Nephropathy and Cardiac Thrombosis: An Uncommon Presentation of Antiphospholipid Syndrome. J Clin Rheumatol. 2020 Oct 22. Dec 1;27(8S):S699-S700. doi: 10.1097/RHU.0000000000001589. PMID: 33105315. (IF 1.8)
  • Sugin LJS, Murugesan A, Bindu M, Sunil KN. Roflumilast: A potential drug for the treatment of cognitive impairment? Neurosci Lett. 2020 Sep 25;736:135281. doi: 10.1016/j.neulet.2020.135281. Epub 2020 Jul 28. PMID: 32735939. (IF: 2.27;Cite Score:4.1)
  • Atul Goel, Sunil K Narayan, Ramkumar Sugumaran. Hemiplegic cerebral palsy complicated by acute hemidystonia in adulthood. Neurol; Clin Pract Sep 2020; DOI: 10.1212/CPJ.0000000000000931. PMID: 34840893 (CiteScore 4.3)
  • Chatterjee D, Nagarajan K, Narayan SK, Narasimhan RL. Regional leptomeningeal
  • collateral score by computed tomographic angiography correlates with 3-month clinical outcome in acute ischemic stroke. Brain Circ 2020;6:107-15. PMID: 33033780 (IF 4.8)
  • Sunil Narayan, Ranukumari A, Shakila R, Jeevanandham L, Liji B, Naveeta Yadav. Effect of dentures in preservation of muscles of mastication- an ultrasongraphic and electromyographic study. Journal of Prosthodontics Dentistry. 2019; 14 (2); 1-13. (IF 4.8; Cites Score 7.3)
  • Murugesan Arumugam and Sunil K.Narayan. Rethinking of the concepts: Migraine is an autoimmune disease? Neurology, Psychiatry and Brain Research. Volume 31, February 2019, Pages 20-26. Indexed in Scopus. CiteScore: 0.9; Source Normalized Impact per Paper (SNIP): 0.328 SCImago Journal Rank (SJR): 0.230
  • Narayan SK, Arumugam M, Chittoria R. Outcome of human peripheral nerve repair interventions using conduits: a systematic review. J Neurol Sci. 2019 Jan 15;396:18-24. doi: 10.1016/j.jns.2018.10.012. Epub 2018 Oct 10. PMID: 30391821; (IF 3.2; Cite score: 6.1)
  • Dheeraj Khurana, M. Vasantha Padma, Rohit Bhatia, Subhash Kaul, Jeyaraj Pandian, P.N. Sylaja, for Guideline Core Committee, Deepak Arjundas, Ashok Uppal, V.G. Pradeep, Vinit Suri, D. Nagaraja, Anand Alurkar, Sunil Narayan for ISA Executive Committee. Recommendations for the Early Management of Acute Ischemic Stroke: A Consensus Statement for Healthcare Professionals from the Indian Stroke Association. Journal of Stroke Medicine. September 20, 2018. Indexed in Scopus https://doi.org/10.1177/2516608518777935
  • Aghoram R, Narayan SK. Patterns of Transcranial Doppler Flow Velocities in Recent Ischemic Stroke Patients. Ann Indian Acad Neurol. 2018 Jul-Sep;21(3):193-196. doi: 10.4103/aian.AIAN_417_17. PMID: 30258261 (IF:1.8)
  • Narayan SK and Elavarasi A. Endovascular Interventional Management of Cerebral Venous Sinus Thrombosis. Journal of Stroke Medicine. August 24, 2018; 1(1) 28 - 33. https://doi.org/10.1177/2516608518774211. (Indexed in scopus)
  • Ramakrishnan TCR, Kumaravelu S, Narayan SK et al; Tenecteplase in Stroke Investigators. Efficacy and Safety of Intravenous Tenecteplase Bolus in Acute Ischemic Stroke: Results of Two Open-Label, Multicenter Trials. Am J Cardiovasc Drugs. 2018 Oct;18(5):387-395. doi: 10.1007/s40256-018-0284-1 (IF 3.0;5-yr IF:2.7)
  • Palugulla S, Devaraju P, Kayal S, Narayan SK, Mathaiyan J. Genetic polymorphisms in cyclin H gene are associated with oxaliplatin-induced acute peripheral neuropathy in South Indian digestive tract cancer patients. Cancer Chemother Pharmacol. 2018 Jun 23. doi: 10.1007/s00280018-3629-1. PMID: 29936608. (IF 2.3;5-yr IF:2.5)
  • Palugulla S, Thakkar DN, Kayal S, Narayan SK, Dkhar SA. Association of Voltage-Gated Sodium Channel Genetic Polymorphisms with Oxaliplatin-Induced Chronic Peripheral Neuropathy in South Indian Cancer Patients. Asian Pac J Cancer Prev. 2017 Nov 26;18(11):3157-3165. doi: 10.22034/APJCP.2017.18.11.3157. PMID: 29172294 (IF 2.52)
  • Das AM, Ramamoorthy L, Narayan SK, Wadwekar V. Barriers of Drug Adherence among Patients with Epilepsy: in Tertiary Care Hospital, South India. J Caring Sci. 2018 Dec 1;7(4):177-181. doi: 10.15171/jcs.2018.027. PMID: 30607357 (SJR 0.54)
  • Aghoram R, Narayan SK. Progressive multifocal leukoencephalopathy in idiopathic CD4+ lymphocytopenia. J Neurovirol. 2018 Aug;24(4):526-528. doi: 10.1007/s13365-018-0638-0. Epub 2018 Apr 23. PMID: 29687403 (IF1.9; 5-yr IF: 2.0)
  • Sreenivasulu Palugulla, Steven Aibor Dkhar, Smita Kayal, Sunil K Narayan. Oxaliplatin‑induced Peripheral Neuropathy in South Indian Cancer Patients: A Prospective Study in Digestive Tract Cancer Patients. Indian J Med Paediatr Oncol 2017; 38:502-7. DOI: 10.4103/ijmpo.ijmpo_143_17. PMID: 29333020
  • Maurya VP, Rajappa M, Wadwekar V, Narayan SK, Barathi D, Madhugiri VS. Tethered Cord Syndrome-A Study of the Short-Term Effects of Surgical Detethering on Markers of Neuronal Injury and Electrophysiologic Parameters. World Neurosurg.2016 Oct; 94:239-247. PMID: 27422680. DOI: 10.1016/j.wneu.2016.07.005 (IF:2.1; 5-year CiteScore: 3.5)
  • Khilari M, Narayan SK. The National Institute of Health toolbox. Ann Indian Acad Neurol 2014; 17:247-52. DOI: 10.4103/0972-2327.138464. PMID: 25221390 (IF 1.8)
  • ENOS Trial Investigators. Efficacy of nitric oxide, with or without continuing antihypertensive treatment, for management of high blood pressure in acute stroke (ENOS): a partial-factorial randomised controlled trial. Lancet. 2015 Feb 14;385 (9968):617-28. doi: 10.1016/S0140-6736(14)61121-1; PMID: 25465108. (IF: 88.5; CiteScore: 87.6)
  • ENOS Investigators. Baseline characteristics of the 4011 patients recruited into the ‘Efficacy of Nitric Oxide in Stroke’ (ENOS) trial. Int J Stroke. 2014 Aug;9(6):711-20. doi: 10.1111/ijs.12308. PMID: 25043647. (IF: 8.7; 5-yr IF: 6.9)
  • Priyadharsini R, Shewade DG, Subraja K, Ravindra BK, Umamaheswaran G, Dkhar SA, Satheesh S, Sridhar MG, Narayan SK, Adithan C. Single nucleotide polymorphism of CYP3A5*3 contributes to clopidogrel resistance in coronary artery disease patients among Tamilian population. Mol Biol Rep. 2014 Aug 12. doi: 10.1007/s11033-014-3613-8; PMID: 25112801 (IF 2.8; 5-yr IF: 2.8)
  • Sahu PS, Parija SC, Kumar D, Jayachandran S, Narayan S. Comparative profile of circulating antigenic peptides in CSF, serum & urine from neurocysticercosis patients diagnosed by immunoblotting. Parasite Immunol. 2014 Jun 26. 36(10):509-21; oi: 10.1111/pim.12124; PMID: 24965663 (IF:2.1; CiteScore:4.2)
  • Narayan SK, Verman A, Kattimani S, Ananthanarayanan PH, Adithan C. Plasma homocysteine levels in depression and schizophrenia in South Indian Tamilian population. Indian J Psychiatry. 2014 Jan;56(1):46-53. doi: 10.4103/0019-5545.124746. PMID: 24574558 (IF:2)
  • Nair PP, Wadwekar V, Murgai A, Narayan SK. Refractory status epilepticus complicated by drug-induced involuntary movements. BMJ Case Rep. 2014 Feb 11; 2014. doi: 10.1136/bcr-2013-202691; PMID: 24518529 (IF 0.5, CiteScore:1.2)
  • Roopesh Kumar VR, Madhugiri VS, Kamalanathan SK, Srinivas BH, Narayan SK, Bidkar P. Complete and curative excision of hypothalamic hamartomas via the orbito-zygomatic approach. Neurol India. 2013 Nov-Dec;61(6):690-1. PubMed PMID: 24441357. (IF 0.9)
  • Kaliaperumal S, Narayan S. Neuroretinitis: Update on a visual emergency and role of technology in its diagnosis. Journal of Biomedical Science and Engineering. 2013 October 30; 6(10B):15-19. doi: 10.4236/jbise.2013.610A2003.(A technology journal. IF 1.68; 7,611 Downloads)
  • Subramanian SK, Gaur GS, Narayan SK. Low luminance/eyes closed and monochromatic stimulations reduce variability of flash visual evoked potential latency. Ann Indian Acad Neurol. 2013 Oct;16(4):614-8. DOI: 10.4103/0972-2327.120492. PMID: 24339591. (IF 1.9)
  • Roopesh Kumar VR, Narayan SK, Madhugiri VS, Sasidharan GM, Gundamaneni SK. Cerebral revascularization with superficial temporal - middle cerebral artery anastomosis for complete carotid occlusion: An emerging modality for preventing recurrent stroke. Ann Indian Acad Neurol. 2013 Oct; 16(4):521-4. DOI: 10.4103/0972-2327.120450; PMID: 24339571. (IF: 1.9)
  • Subraja K, Dkhar SA, Priyadharsini R, Ravindra BK, Shewade DG, Satheesh S, Sridhar MG, Narayan SK, Adithan C. Genetic polymorphisms of CYP2C19 influences the response to clopidogrel in ischemic heart disease patients in the South Indian Tamilian population. Eur J ClinPharmacol. 2013 Mar; 69(3):415-22. DOI: 10.1007/s00228-012-1381-8; PMID: 22955794. (IF 2.7; 5-yr IF 2.7)
  • Narayan SK, Sivaprasad P, Sharma S, Sahoo RK, Dutta TK. Aetiology and outcome determinants of Intracerebral Hemorrhage (ICH) in a South Indian population, a hospital based study. Ann Indian Acad Neurol 2012; 15:263-6. doi: 10.4103/0972-2327.104333; PMID: 23349590. (IF 1.9)
  • Senthil Kumar S, Gaur.G.S, Narayan.S.K. Effect of color of flash stimulus on variability of flash visual evoked potential latencies. Indian J Physiol Pharmacol 2012; 56(4): 28–35. https://pubmed.ncbi.nlm.nih.gov/23781651/ PMID: 23781651 (Scopus CiteScore: 0.6)
  • Murgai A, Nair PP, Narayan S. Teaching NeuroImages: Neuropathic elbow arthropathy due to syringomyelia. Neurology. 2012 Sep 18;79(12):e102. doi: 10.1212/WNL.0b013e31826aad39. PMID: 22987748 (IF 8.4)
  • Narayan SK, Firbank MJ, Saxby BK, Stansby G, Hansrani M, O'Brien JT, Ford GA. Elevated Plasma Homocysteine Is Associated with Increased Brain Atrophy Rates in Older Subjects with Mild Hypertension. Dement Geriatr Cogn Disord. 2011 May18; 31(5):341-348. DOI: 10.1159/000328118; PMID: 21597295. (IF 1.9; CiteScore:5.3)
  • Narayan SK, Saxby BK, Firbank MJ, O'Brien JT, Harrington F, McKeith IG, Hansrani M, Stansby G, Ford GA. Plasma homocysteine and cognitive decline in older hypertensive subjects.
  • Int Psychogeriatr. 2011 May 6:1-9. DOI: 10.1017/S1041610211000779; PMID: 21554791. (IF: 4.3; CiteScore: 8.8)
  • Ramasamy K, Narayan SK, Shewade DG, Chandrasekaran A. Influence of CYP2C9genetic polymorphism and undernourishment on plasma-free phenytoin concentrations in epileptic patients. Ther Drug Monit. 2010 Dec; 32(6):762-6. doi: 10.1097/FTD.0b013e3181fa97cc; PMID:21068649. (IF 2.4)
  • Firbank MJ, Narayan SK, Saxby BK, Ford GA, O'Brien JT. Homocysteine is associated with hippocampal and white matter atrophy in older subjects with mild hypertension. Int Psychogeriatr. 2010 Aug; 22(5):804-11. doi: 10.1017/S1041610210000499; PMID: 20374668. (IF 4.3; CiteScore:8.8)
  • Narayan SK, Swaroop A, Jayanthi S. Chronic epidural intracranial actinomycosis: A rare case. Ann Indian Acad Neurol. 2009 Jul; 12(3):195-6. doi: 10.4103/0972-2327.56324; PMID: 20174505.(IF 1.9)
  • Narayan SK, Kumar K, Swaminathan RP, Roopeshkumar VR, Bhavna B. Isolated cerebral aspergilloma in a young immunocompetent patient. Pract Neurol. 2009 Jun; 9(3):166-8. doi: 10.1136/jnnp.2009.176594; PMID: 19448060. (IF 2.3; CiteScore: 3.3)
  • Narayan SK, Sreelakshmi M, Sujatha S, Dutta TK. Anthrax meningoencephalitis--declining trends in an uncommon but catastrophic CNS infection in rural Tamil Nadu, South India. J Neurol Sci. 2009 Jun 15; 281(1-2):41-5. doi: 10.1016/j.jns.2009.02.376; PMID: 19304297. (IF 3.2; CiteScore:6.1)
  • Sahu PS, Parija SC, Narayan SK, Kumar D. Evaluation of an IgG-ELISA strategy using Taenia solium metacestode somatic and excretory-secretory antigens for diagnosis of neurocysticercosis revealing biological stage of the larvae. Acta Trop. 2009 Apr;110(1):38-45. DOI: 10.1016/j.actatropica.2009.01.002; PMID: 19183550. (IF 2.5; CiteScore: 4.8)
  • Narayan SK, Sivaprasad P, Sahoo RN, Bhuvaneswari V. Teaching video NeuroImage: Chvostek sign with Fahr syndrome in a patient with hypoparathyroidism. Neurology. 2008 Dec 9;71(24):e79. doi: 10.1212/01.wnl.0000336974.93499.ad; PMID: 19064874. (IF 8.4)
  • Narayan SK, Kaliaperumal S, Srinivasan R. Neuroretinitis, a great mimicker. Ann Indian Acad Neurol. 2008 Apr; 11(2):109-13. doi: 10.4103/0972-2327.41879.; PMID: 19893649. (IF 1.9)
  • Doble Mukesh, Narayan Sunil K. Mathematical Analysis of EEG of Patients with Non-fatal Nonspecific Diffuse Encephalitis. Mathematical Analysis of EEG of Patients with Non-fatal Nonspecific Diffuse Encephalitis. International Journal of Medicine and Medical Sciences. 2008; 3(4):254-260. (Biomedical Technology Journal).
  • Ramasamy K, Narayan SK, Chanolean S, Chandrasekaran A. Severe phenytoin toxicity in a CYP2C9*3*3 homozygous mutant from India. Neurol India. 2007 Oct-Dec; 55(4):408-9. doi: 10.4103/0028-3886.33300; PubMed PMID: 18040121. (IF 0.9)
  • Narayan SK, Kumar S, Prabhakar P, Elangovan S, Baumann N, Verma IC. Multiple Sclerosis in Keralite siblings after migration to the Middle East: a report of familial Multiple Sclerosis from India. J Neurol Sci. 2007 Sep 15; 260(1-2):244-8. doi: 10.1016/j.jns.2007.03.025; PMID: 17588606. (IF 3.2;CiteScore:6.1)
  • Narayan SK, Kaveer N. CNS demyelination due to hypocupremia in Wilson's disease from overzealous treatment. Neurol India. 2006 Mar; 54 (1):110-1. doi: 10.4103/0028-3886.25146; PMID: 16679666. (IF 0.9)
  • Narayan SK, Dutta JK. Creutzfeldt-Jakob disease. J Asoc Physicians India. ; 53:791-5. Review. https://pubmed.ncbi.nlm.nih.gov/16334625/; PMID: 16334625. (Scopus CiteScore: 0.6)
  • Nandigam K, Narayan SK. Time and cost: are they the only contributors to poor rate of stroke thrombolysis. Neurol India. 2004 Dec; 52(4):519. https://pubmed.ncbi.nlm.nih.gov/15626859/; PMID: 15626859. (IF 0.9)
  • Prakash ES, Madan Mohan, Narayan SK, Prashanth U, Kamath MG, Udupa K, Sethuraman KR, Srinivasan S, Kumar RA. Tilt table testing in the diagnostic evaluation of presyncope and syncope: a case-series report. Indian J Physiol Pharmacol. 2004 Apr; 48(2):213-8. https://pubmed.ncbi.nlm.nih.gov/15521561/; PMID: 15521561. (Scopus CiteScore: 0.6)
  • Biswas R, Parida SC, Narayan SK. Dot-ELISA for the diagnosis of neurocysticercosis. Rev Inst Med Trop Sao Paulo. 2004 Sep-Oct; 46(5):249-52. doi: 10.1590/s0036-46652004000500003; PMID: 15517026. (CiteScore 2.9)
  • Ghotekar LH, Dutta TK, Narayanan S, Basu D, Dambal A, Vivekanandan. Trigger autoimmunity -development of multiple plexopathy in a patient with chronic idiopathic thrombocytopenic purpura. Neurol India. 2004 Jun;52(2):281-2. https://pubmed.ncbi.nlm.nih.gov/15269507/; PMID: 15269507
  • Nandigam K, Narayan SK, Elangovan S, Dutta TK, Sethuraman KR, Das AK. Feasibility of acute thrombolytic therapy for stroke. Neurol India. 2003 Dec;51(4): 470-3. https://pubmed.ncbi.nlm.nih.gov/14742924/; PMID: 14742924.(IF 0.9)
  • Hamide A, Sarkar E, Kumar N, Das AK, Narayan SK, Parija SC. Acanthameba Meningo- encephalitis: a case report. Neurol India. 2002 Dec;50(4):484-6. https://pubmed.ncbi.nlm.nih.gov/12577102/; PMID: 12577102. (IF 0.9)
  • European Carotid Surgery Trialists' Collaborative Group. Prediction of benefit from carotid endarterectomy in individual patients: a risk-modelling study. Lancet. 1999 Jun 19; 353(9170):2105-10. (Ack) doi: 10.1016/s0140-6736(98)11415-0; PMID: 10382694. (IF 88.5; 5-yr IF:104.8; CiteScore:80.6)
  • European Carotid Surgery Trialists’ Collaborative Group. Randomised trial of endarterectomy for recently symptomatic carotid stenosis: final results of the MRC European Carotid Surgery Trial (ECST). The Lancet .Vol 351. May 9, 1998. PMID: 9593407. (IF 88.5; 5-yr IF:104.8;CiteScore:80.6)
  • Wardlaw JM, Marshall I, Wild J, Dennis M, Cannon J, Lewis C. Studies of Acute Ischemic Stroke with Proton Magnetic Resonance Spectroscopy. Relation between time of onset, neurological deficit, metabolic abnormalities in the infarct, Blood flow and clinical outcome (Ack). Stroke. 1998; 29:1618-1624. doi: 10.1161/01.str.29.8.1618; PMID: 9707203; (IF 10.1; 5-yr IF 9.9)
  • Narayan SK, Kuruvilla A, Shanmugam J, Radhakrishnan VV. Fast-wave periodic complexes in a mentally retarded child who later developed subacute sclerosing panencephalitis: a modification of a classic EEG by preexisting brain damage? Dev Med Child Neurol. 1997 Nov; 39 (11):766-9. doi: 10.1111/j.1469-8749.1997.tb07380.x PMID: 9393892. (IF 4.3; CiteScore 8.1)
  • Narayan SK, Sarada C, Radhakrishnan K, Nair MD, Kartha CC, Neelakandhan KS, Tharakan KJ. Response to thymectomy in South Indian patients with myasthenia gravis. Acta Neurol Scand. 1996 Jul;94(1):63-6. doi: 10.1111/j.1600-0404.1996.tb00041.x; PMID: 8874596. (IF 2.7; CiteScore 7.2)
  • Radhakrishnan VV, Saraswathy A, Mohan PK, Narayan SK. Necrotizing myelopathy--a report of two cases with review of literature. Indian J Pathol Microbiol. 1994 Oct; 37(4):439-45. Review. PMID: 7868180. (IF 0.8)
  • Narayan SK, Philip E, Nair MKC. Neuro developmental sequelae of pyogenic meningitis in children. Neurol India. 1996 Oct-Dec; 44(4):170-176. PMID: 29542524 (IF 0.9). Author Cumulative Impact Factor: 547; Average IF: 4.64
  • Publications in Unindexed Journals
  • Preethi Venkatesan, Maanasa M Bhaskar, Sujatha Sistla, S Badrinath, Sunil K Narayan. Evaluation of immunological and molecular methods for rapid diagnosis of herpes simplex type-1 encephalitis. Journal of Clinical and Diagnostic Research. 2018 Aug, 12(8): 24-27. doi: https://doi.org/10.7860/JCDR/2018/ 36435.11937
  • Narayan S.K. Migraine and its management. Indian journal of Pediatric Neurology. 2002; April.221-223.
  • Sunil K Narayan. Current status of stroke care and research in India. Neurolinks.Vol. 4.01 Perspectives.2007 (Spring and Summer) www.nsig.org
  • Mark Christopher, Narayan S.K Sivarajan. K, Sethuraman K.R and Chandrasekharan.R: An unusual presentation of a rare CNS tumor. JIPMER Scientific Society Bulletin. 2001.
  • Febrile Seizures. Narayan SK, Proceedings of 2nd SAARC meeting on Reduction of Childhood Neuromorbidity 2002, P.29-31. Ministry of external affairs, Department of Science & Technology, Government of India.
  • Management of status Epilepticus: Narayan S.K. Physician’s Digest. June- July 2004 Vol 13, No.2 .P. 66-87.
  • Sudhir K, Narayan SK, Elangovan S, Puran Singh, Bowmann N, Verma IC. Familial Multiple Sclerosis in Keralite siblings after migration to the Middle East; rare expression of a genetic trait due to environmentally triggered factors? JIPMER Scientific Society Bulletin. 2007-8; 87-92

Full Papers In Press

  • MS ID#:IJS-10-24-12875. Comparison of Long-Term Outcomes of Alteplase versus Tenecteplase Thrombolysis in Patients with Ischemic Stroke : A 2011-2024 Ambispective Follow Up Study. International Journal of Stroke.
  • MS ID#: BOC.202400146. A Comparative Evaluation of Polyethylene Glycol and Total Exosome Isolation for Exosome Isolation: Implications for Cost Effective Research" Biology of the Cell.
  • Etiology, Clinical Profile And Management Practices In Atrial Fibrillation In A Tertiary Care Hospital In South India:
  • MS ID#: STROKE/2024/049350. MS TITLE: Comparing Stroke Profiles and Outcomes between Urban and Rural India: A Secondary Analysis of the SPRINT INDIA Trial AUTHORS: Shweta Verma, Arya Devi, Deepti Arora, Aneesh Dhasan, P N Sylaja, Dheeraj Khurana… Sunil Narayan, et al.
  • MS ID#: IJMR_454_19. “An update on Clinical trials in Stem Cell therapy in ischemic stroke. Indian Journal of Medical Research”. (In press)
  • MS ID#: CORTEX-D-22-00228. Title: Effect of prior transcranial direct current stimulation (tDCS) on the Indian every-day-language and cognitive rehabilitation programme (REPAIR), in post stroke aphasia -a pilot study
  • MS ID#: A-10-2447-1. Capsaicin Induced Regional Brain Plasma Protein Extravasation: A novel Preclinical Rabbit Animal Model for Migraine drug discovery. Submitted: in Basic and Clinical Neuroscience

Books

  • Narayan SK, Sanchetee P. Selected topics in Tropical Neurology. Publisher: Byword Books; Hardback| 268 pages; Publication date: 10 July 2015; ISBN 10: 8181931173; ISBN 13: 9788181931177

Chapters in Books

  • Narayan SK, Jeshma J. Neuromodulation in stroke rehabilitation. IAN Series on Stroke Rehabilitation 2024, edited by Dr. Abhishek Srivastava and Dr. Guhan Ramamurthy. Jaypee Brothers Medical Publishers.
  • Sunil K Narayan and Jayaram Saibaba. Neuroborreliosis and the Expanding Spectrum: Diagnostic and Therapeutic Challenges. 2025; Chapter 200018. Encyclopedia of the Neurological Sciences, 3rd edition, Volume 1 https://doi.org/10.1016/B978-0-323-95702-1.00454-1. Elsevier Publishers.
  • Narayan.SK. Pathophysiology of Ischemic Stroke. Chapter 2; in Reviews in Neurology. Ed. Lakshmi Narasimhan Ranganathan; Wolters Kluwer. ISSN: in Indian Academy of Neurology. ISSN 09715924; ISBN 978-973-893-35.
  • Narayan S K. Imaging in diagnosis of Rabies (chapter). ‘Human Rabies’ edited by JaminiKanta Dutta. P 64-78. Sradha publications, Balasur, India.2005
  • Narayan SK. Controversies in Genetic testing: CME book, Indian Academy of Neurology 2010.
  • Narayan SK, Adithan C, Chinnery PF. Neurogenetics, an update. CME book, Neurological Society of India. 2011.
  • Sushma S, Narayan S. Central Nervous System Infections in Elderly. 467-478. Ch.95; Section 14; Neurology. In Textbook of Geriatric Medicine. Ed. Pratap Sanchetee. Paras Medical Publisher, New Delhi 2014.
  • Sunil K Narayan. Epigenetics in Tropical Neurology; Chapter 14. In “Selected Topics in Tropical Neurology”; Byword books. July 2015; ISBN 10: 8181931173; ISBN 13: 9788181931177
  • Sunil Narayan, Section 14: Neurogenetics: In: Kalyan B Bhattacharyya, Gagandeep Singh: Yearbook of Neurology 2022, Jaypee Brothers Medical Publishers (P) Ltd.: 2023; 9789354659430; Pages; 236-81
Awards & Acheivements :
  • Runner up: World Congress of Neurology Tournament of Minds: International Quiz; Marrakesh 201
  • Neurorehabilitation initiative of the year award for Indian Academy of Neurology 2024
  • Best Research Paper Award IANCON 2022, Madurai Tiruchirappalli Neurologists Association Laboratory Sciences
  • Neurogenetics Best Research Award paper of IAN at IANCON 2022, Madurai 10.
  • Commonwealth Split-site PhD Doctoral Scholarship ~GBP 10,000 University of Newcastle March 2007-Aug 2007 and October 2008-March 2009
  • NAMASTE India – Erasmus Mundus Mobility grant 2015, Departments of Clinical Neurophysiology and Engineering designs, University of Goettingen, Germany
  • Hargobind Medical Foundation Fellowship Visiting Clinical Research Fellowship: Edinburgh Stroke Research and clinical trial Fellowship 1995-96
  • International Stroke Society Young Investigator award 2004, to attend WSC 2004 at Sydney
  • XIV World Congress of Neurology Young investigator Travel Grant 1996
  • Young investigator Conference Travel Grant awards from UGC and INSA, World Congress of Neurology, Sydney, Australia2005
  • Conference Travel Grant UGC, AANCON 2014, San Diego April 2013