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Neurology India
Medknow Publications on behalf of the Neurological Society of India
ISSN: 0028-3886
EISSN: 0028-3886
Vol. 50, No. 4, 2002, pp. 487-489
Bioline Code: ni02130
Full paper language: English
Document type: Research Article
Document available free of charge

Neurology India, Vol. 50, No. 4, 2002, pp. 487-489

 en Case Report - Bereitschaftspotential in Tic Disorders : A Preliminary Observation
H.S. Duggal, S.Haque Nizamie

Abstract

Sensory phenomena in tic disorders such as Tourette's syndrome are known but are substantiated by only a handful of studies. In this preliminary report, we studied premonitory urge, a type of sensory phenomenon in three patients of tic disorders. Bereitschaftspotential, a movement-related cognitive potential indicative of motor preparation, was assessed in these patients. As bereitschaftspotential was observed in all our cases prior to occurrence of tics, it is speculated that tics are not entirely involuntary but are quasi-volitional in nature. Bereitschaftspotential may thus represent a neurophysiological marker of premonitory urge in tic disorders. Implications of exploring the voluntary nature of tics are discussed.

Keywords
Bereitschaftspotential, Tic disorder, Premonitory urge

 
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