Nervous and mental diseases . c and involuntary choreoid or athetoid movements, which oftenattain a wonderful complexity and range. They may also involve theface, but seldom to the degree that is observed in diplegic cases. Theseathetoid movements are usually intensified upon voluntary effort to use thelimb. Attempts to grasp an object will often cause the fingers to movewidely apart in extreme extension, and after clumsy, slow movementsthe object is awkwardly and insecurely held or the attempt fails. Insome cases the extremities, particularly the upper one, are writhed aboutin the most vigoro
Nervous and mental diseases . c and involuntary choreoid or athetoid movements, which oftenattain a wonderful complexity and range. They may also involve theface, but seldom to the degree that is observed in diplegic cases. Theseathetoid movements are usually intensified upon voluntary effort to use thelimb. Attempts to grasp an object will often cause the fingers to movewidely apart in extreme extension, and after clumsy, slow movementsthe object is awkwardly and insecurely held or the attempt fails. Insome cases the extremities, particularly the upper one, are writhed aboutin the most vigorous, serpentine, and purposeless way, striking thepatients face or getting into awkward positions behind the neck or back. The athetosis in rare cases is persistent day and night, in others itsubsides during sleep, and in still others, and perhaps the majority of 246 DISEASES OF THE BRAIN PROPER. cases, it only appears when provoked by voluntary effort or emotionaldisturbance. In the cases that are marked by excessive athetoid.
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