Senior Resident in department of neurology - NIMHANS Bangalore – 2009 to 2012

Assistant professor of Neurology - Bangalore medical college and research institute, Bangalore – 2012 - 2015

Associate professor of neurology (from February 2015 till date) Department of neurology Bangalore medical college and research institute Fort, K.R.Road Bangalore – 560002

clinical research fellow in Kings college London for 1 year (2018-19)

clinical research fellowship in headache medicine at Kings college London, UK.

KasturiMuralidhar gold medal in MD (General medicine) in 2002 by RGUHS (University) 

API gold medal in MD (General medicine) in 2002

Dr.AnisyaVasanth memorial award for the best post graduate resident in DM (Neurology) in 2012

• Majumdar V, Nagaraja D, Karthik N, Christopher R. Association of endothelial nitric oxide synthase gene polymorphisms with early onset ischemic stroke in south Indians. J AtherosclerThromb 2010;17:45-53.
• Yadav R, Ramdas M, Karthik N,Kulkarni GB, Dawn R, Kumar MV, Nagaraja D. Hot cross bun sign in HIV positive progressive multifocal leukoencephalopathy. NeurolInd 2011; 59:293-4.
• Karthik N,Kulkarni GB, Taly AB, Rao S, Sinha S. Sleep disturbances in migraine without aura – a questionnaire based study. J NeurolSci 2012 Oct 15; 321:73-6.
• Karthik N,Sinha S, Taly AB, Kulkarni GB, Ramachandraiah CT, Rao S. Alteration in polysomnographic profile in migraine without aura compared to healthy controls. Sleep Med 2013; 14:211-4.
• Karthik N, Taly AB, Gupta A, Prasad  C, Christopher R. Prevalence of fatigue in patients with multiple sclerosis and its effect on the quality of life. J Neurosci Rural Pract 2013,  4:278-82.
• Karthik N, Taly AB, Gupta A, Prasad C, Christopher R.  Depression and sleep disturbances in patients with multiple sclerosis and correlation with associated fatigue. J Neurosci Rural Pract. 2013; 4:387-91.
• Desai M, Agadi JB, Karthik N, Praveen Kumar S, Netto AB. Olfactory abnormalities in temporal lobe epilepsy. J ClinNeurosci 2015; 22:1614-8.
• Nagaraja D Karthik N.  Cerebral venous thrombosis  API Text Book of Medicine 10th Edition 2015; p 1933-36
• Nayak C, Sinha S, Nagappa M, Karthik N, Kulkarni GB, Thennarasu K, Taly AB. Study of sleep microstructure in patients of migraine without aura. Sleep Breath 2016; 20:263-9.
• Srikanteshwara PK, Cheluvaiah JD, Agadi JB, Karthik N. The relationship between nerve conduction study and clinical grading of carpal tunnel syndrome. J ClinDiag Res. 2016; 10: 13-8.
• VarunRaghavan NS, Archana NB, Agadi JB, Karthik N, Deepak N. Osmotic demyelination syndrome and rabdomyolysissecondary to postpartum hypernatremia. Neurology 2016; 86: 16.
• Shreyashi G, Karthik N, VasanthaKamath.Zika: Global epidemiology. Is it a threat to India       J Int med Res. 2018; 6: 44-55 
• Karthik N, D Nagaraja.  Cerebral venous sinus thrombosis Indian academy of Neurology   2018;20: 152-8
• Agadi JB, Karthik N, Archana NB et al "Recurrent AMSAN variant of GBS – a rare entity'  Pannagaria A Eds in "A clinician’s approach to neurological disorders – Indian experience"  1st edition, 2019 181-6
• Nagaraja D, Karthik N "Cerebral venous and sinus thrombosis  in  Sandhyakamath (Eds) in  API Textbook of Medicine 11th Edition.2019 p1956-61