Mona Lisa's smile: a hypothesis based on a new principle of art neuroscienceAmbar Chakravarty
Department of Neurology, Vivekananda Institute of Medical Science, Calcutta, India
Med Hypotheses 75:69-72. 2010
..The author hypothesizes that the great painter Leonardo da Vinci very intelligently painted the angles of the mouth of Mona Lisa's face to evoke this illusion of movement (smile) to increase the aesthetic value of this great work of art...
Sporadic hemiplegic migraineA Chakravarty
Department of Neurology, Vivekananda Institute of Medical Sciences, KPC Medical College Kolkata, India
Indian Pediatr 49:150-1. 2012
..The differential diagnoses are discussed. The case is reported for its rarity and to increase awareness...
Hemifacial spasm, glossodynia, and dolichoectasia of the basilar arteryAmbar Chakravarty
Department of Neurology, Vivekananda Institute of Medical Science, Calcutta, India
J Stroke Cerebrovasc Dis 21:78-81. 2012
..It is suggested that the neurologic symptoms most likely resulted from pontine compression, rather than from any compression of the cranial nerves...
Chronic daily headache in children and adolescents: a clinic based study from IndiaA Chakravarty
Department of Neurology, Vivekananda Institute of Medical Sciences, 59 Beadon Street, Calcutta 700006, India
Cephalalgia 25:795-800. 2005
..There is need for a modified diagnostic criteria and terminology for chronic primary headaches in children...
Primary headaches associated with sexual activity--some observations in Indian patientsA Chakravarty
Department of Neurology, Vivekananda Institute of Medical Sciences, Calcutta, India
Cephalalgia 26:202-7. 2006
..Occurrence of sexual headaches in both male and female subjects had been unpredictable. Few had associated migraine and none ever experienced exertional headache...
Observations on juvenile myoclonic epilepsy amongst ethnic Bengalees in West Bengal--an Eastern Indian StateA Chakravarty
Department of Neurology, Vivekananda Institute of Medical Sciences, Calcutta, India
Seizure 16:134-41. 2007
..However, no study has yet been reported from the Eastern part of India and none done so far in patients in a specific ethnic group. Furthermore therapy response and follow up data are not available in detail in the Indian studies...
Migraine pain location at onset and during established headaches in children and adolescents: a clinic-based study from eastern IndiaA Chakravarty
Department of Neurology, Vivekananda Institute of Medical Sciences, 59 Beadon Street, Calcutta 700 006, India
Cephalalgia 27:1109-14. 2007
..In all, 73.5% of children ultimately experienced holocranial headaches. This study documents pain location at onset and during established headaches in children with migraine largely from a specific ethnic group...
Exploding head syndrome: report of two new casesA Chakravarty
Department of Neurology, Vivekananda Institute of Medical Sciences, Calcutta, India
Cephalalgia 28:399-400. 2008
Migraine pain location: how do children differ from adults?A Chakravarty
Department of Neurology, Vivekananda Institute of Medical Science, Calcutta, India
J Headache Pain 9:375-9. 2008
..During established headache unilateral pain was recorded in only a small proportion of children (10.5%) whereas it was noted in many adults' subjects (40.5%). Such a detailed comparative study had not been made earlier...
Artistic talent in dyslexia--a hypothesisAmbar Chakravarty
Department of Neurology, Vivekananda Institute of Medical Sciences, Kolkata 700026, India
Med Hypotheses 73:569-71. 2009
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Trigger factors in childhood migraine: a clinic-based study from eastern IndiaAmbar Chakravarty
Department of Neurology, Vivekananda Institute of Medical Sciences, Calcutta, India
J Headache Pain 10:375-80. 2009
..Most migraine triggers identified were environmental (sun exposure, hot humid weather, smoke and noise) and stress related (school stress mostly). Quite often these operated concurrently to precipitate individual migraine attacks...
Migraine, neuropathic pain and nociceptive pain: towards a unifying conceptA Chakravarty
Department of Neurology, Vivekananda Institute of Medical Sciences, Calcutta, India
Med Hypotheses 74:225-31. 2010
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The creative brain--revisiting conceptsAmbar Chakravarty
Department of Neurology, Vivekananda Institute of Medical Science, 1E 1202, Avishikta II, Calcutta 700 078, India
Med Hypotheses 74:606-12. 2010
..It is hypothesized that that subtle frontal dysfunction is a pre-requisite for creative cognition but here again the relationship is also in an inverted U-form...
How triggers trigger acute migraine attacks: a hypothesisAmbar Chakravarty
Department of Neurology, Vivekananda Institute of Medical Science, 1E 1202, Avishikta II, Calcutta 700 078, India
Med Hypotheses 74:750-3. 2010
..The suggested hypothesis on mechanism of action of triggers, offers theoretical basis for efficacy of currently available pharmacologic and non-pharmacologic therapies for abortive and prophylactic treatment of migraine...
Migraine, epileptic seizures and psychogenic non-epileptic seizures: observations in Indian patients in a clinic-based studyA Chakravarty
Department of Neurology, Vivekananda Institute of Medical Science, Kolkata, India
Neurol India 58:631-3. 2010
..This appears to be the first report on these features in Indian subjects with migraine...
Sporadic hemiplegic migraine in children: a report of two new casesA Chakravarty
Department of Neurology, Vivekananda Institute of Medical Sciences, Kolkata, India
Neurol India 58:648-50. 2010
..The second case is perhaps the youngest patient reported with this disorder...
Unifying concept for Alzheimer's disease, vascular dementia and normal pressure hydrocephalus - a hypothesisAmbar Chakravarty
Department of Neurology, Vivekananda Institute of Medical Sciences, 59 Beadon Street, Calcutta 700006, India
Med Hypotheses 63:827-33. 2004
..Hypoperfusion may also affect formation as well as absorption of CSF altering clearance of amyloid and promoting vascular and parenchymal deposition. Thus the pathologies of AD, VaD and NPH get interrelated...
Trigeminal autonomic cephalgias and variants: clinical profile in Indian patientsA Chakravarty
Department of Neurology, Vivekananda Institute of Medical Sciences, Kolkata, India
Cephalalgia 24:859-66. 2004
..TACs appear to be rare in Indian patients and cluster headache seems to be exclusively a disease of men. The present report is to the best of our knowledge the first of its kind to be reported from India...
Chronic daily headaches: clinical profile in Indian patientsA Chakravarty
Division of Neurology, Vivekananda Institute of Medical Sciences, Calcutta, India
Cephalalgia 23:348-53. 2003
..CDH in India is not uncommon. Analgesic/ergot overuse needs to be recognized early. The average dose of analgesic implicated in CDH seems much less compared with that reported in the West...
MR evaluation of crossed and uncrossed cerebral-cerebellar diaschisisA Chakravarty
Division of Neurology, Vivekananda Institute of Medical Sciences, Calcutta
Acta Neurol Scand 108:60-5. 2003
..Functional neuroimaging studies in support of the concept of CCD and ICD have been critically reviewed in the light of the morphological changes demonstrated in the cases cited herein...
SUNCT syndrome responsive to lamotrigine: documentation of the first Indian caseA Chakravarty
Department of Neurology, Vivekananda Institute of Medical Science, Calcutta, India
Cephalalgia 23:474-5. 2003
Why women do not get micturition syncope?--a hypothesisA Chakravarty
Vivekananda Institute of Medical Science, Calcutta, India
Med Hypotheses 61:463-4. 2003
..Significant venous pooling in legs is also prevented by adopting a squatting posture and using a commode seat...
Friedreich's ataxia--yesterday, today and tomorrowA Chakravarty
Department of Neurology, Vivekananda Institute of Medical Science, Calcutta, India
Neurol India 51:176-82. 2003
..Of great promise is the use of free radical scavengers and antioxidants. One such agent idebenone, a short chain analogue of co-enzyme Q10, may have a future...
Primary degenerative cerebellar ataxias in ethnic Bengalees in West Bengal: some observationsA Chakravarty
Department of Neurology, Vivekananda Institute of Medical Sciences, Medical College, Kolkata 700 006, India
Neurol India 51:227-34. 2003
..The need for clinical and genetic studies of ataxias in different specific ethnic populations of India has been stressed...
Autosomal dominant cerebellar ataxias in ethnic Bengalees in West Bengal - an Eastern Indian stateA Chakravarty
Division of Neurology, Vivekananda Institute of Medical Sciences, Calcutta, India
Acta Neurol Scand 105:202-8. 2002
..The present study attempted to look into the patterns of ADCA amongst ethnic Bengalee patients hailing from the eastern Indian state of West Bengal...
X-linked Charcot-Marie-Tooth disease with myokymia: report of a familyA Chakravarty
Vivekananda Institute of Medical Sciences and B R Singh Hospital and Research Center, Calcutta, India
Neurol India 51:385-7. 2003
..Pedigree analysis suggested an x-linked recessive form of inheritance. This appears to be the first report of an Indian family with x-linked Charcot-Marie-Tooth disease...
Crossed cerebral - cerebellar diaschisis: MRI evaluationA Chakravarty
Department of Neurology, Vivekananda Institute of Medical Sciences, Calcutta, India
Neurol India 50:322-5. 2002
..These observations provide morphological evidence of the phenomenon of crossed cerebral-cerebellar diaschisis (CCD). Functional neuroimaging studies in support of the concept of CCD has been critically reviewed...
Squatting, blood pressure and strokeS D Chakrabarti
Medical College, Calcutta
J Assoc Physicians India 50:382-6. 2002
..We would suggest that hypertensive subjects and those at risk of stroke should avoid squatting and urge physicians to check squatting BP while monitoring anti-hypertensive therapy...
Vertigo and dizziness--a clinical approachA Mukherjee
Department of Neurology, Vivekananda Institute of Medical Science, Kolkata
J Assoc Physicians India 51:1095-101. 2003
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Is squatting a triggering factor for stroke in Indians?S D Chakrabarti
Rotating Intern, Medical College Hospital, Calcutta, India
Acta Neurol Scand 105:124-7. 2002
..The present study has been designed to assess the validity of this observation and to identify the likely triggering factor in stroke onset in such situations...
Sepsis and neurologyA Chakravarty
Department of Neurology, Calcutta National Medical College, Calcutta
J Assoc Physicians India 51:385-90. 2003
The neurology of eclampsia : some observationsA Chakravarty
Department of Neurology, Vivekananda Institute of Medical Sciences and Medical College, Calcutta, 700006, India
Neurol India 50:128-35. 2002
..A brief note on the pathogenesis of the cerebral lesions is included and the controversial aspect of seizure control in eclampsia highlighted...
Neurologic illness following post-exposure prophylaxis with purifiled chick embryo cell antirabies vaccineA Chakravarty
Vivekananda Institute of Medical Sciences, Calcutta
J Assoc Physicians India 49:927-8. 2001
..Neurologic complication following PCEC vaccination has not been reported earlier...
A patient with optic pathway glioma, scoliosis, Chiari type I malformation and syringomyelia: is it Neurofibromatosis type 1?A Chakravarty
Department of Neurology, Vivekananda Institute of Medical Sciences, Calcutta, India
Neurol India 50:520-1. 2002
..We considered this combination to be more than coincidental and argue in favour of considering the case as a variant form of Neurofibromatosis type 1. The relevent literature in favour of our contention has been reviewed...
Familial pediatric rapidly progressive extrapyramidal syndrome: is it Hallervorden-Spatz disease?Ambar Chakravarty
Department of Neurology, Vivekananda Institute of Medical Sciences, Calcutta, India
Pediatr Neurol 29:170-2. 2003
..The diagnosis should be considered a variant form of HSD...
Must all patients with headaches associated with sexual activity fulfill ICHD-2 criteria?Ambar Chakravarty
Department of Neurology, VIMS, Calcutta, India
Headache 47:436-8. 2007
..Nosological and other issues raised by these cases are discussed and inclusion of such cases within the rubric of Benign Sexual Headaches is argued...