Aspects of motor and cognitive patterns related to functional capacity in Huntington's disease.

Results of this study confirm that impairment of voluntary movements tested by RT and FT are impotant signs of motor pattern of HD, even in early stages. The significant correlation found between multiple choice reaction times tests and TFC seems to suggest that early in the disease a reduction of ability in complex motor planning is associated with functional decline and marks HD evolution more than hyperkinesias and psychic impairment