A motor disturbance. There are three varieties: (1) rapid rhythm-eight to twelve per second; (2) that having from five to five and a half to seven and a half per second; (3) slow, having four to five to the second.

One variety stops during voluntary movements (paralysis agitans); the other begins with the movements and grows more violent as the end approaches (multiple sclerosis). Then there is a type confined to one limb--the hemiplegic type.

Chorea belongs to children's diseases. It is an indication of bad care--lack of poise. Rest and correcting the manner of living, is the proper treatment.