Electrophysiological analysis of motor control in patients with vascular hemichorea.
An EMG analysis of motor control was performed in 4 patients with unilateral choreic movements of sudden onset, 3 of whom presented CT scan evidence of lacunar infarcts involving the contralateral striatum. The choreic dyskinesias were correlated with EMG bursts of variable duration occurring with a random order of activation. Ballistic elbow flexion movements were performed with a normal triphasic EMG pattern, but both size and duration of the first agonist burst were increased on the affected side. Abnormalities of cerebral somatosensory evoked responses were observed in 3 patients on stimulation of the side with choreic movements.
Abbruzzese
G
G
Clinica Neurologica dell'Università, Genova.
Brusa
G
G
Dall'Agata
D
D
Morena
M
M
Spadavecchia
L
L
Favale
E
E
D000368:Aged; D001479:Basal Ganglia / Q000503:physiopathology; D002544:Cerebral Infarction / Q000503:physiopathology; D002561:Cerebrovascular Disorders / Q000503:physiopathology*; D002819:Chorea / Q000503:physiopathology*; D003342:Corpus Striatum / Q000503:physiopathology; D004569:Electroencephalography; D004576:Electromyography; D005073:Evoked Potentials, Somatosensory; D005260:Female; D006801:Humans; D006973:Hypertension / Q000503:physiopathology*; D008297:Male; D009046:Motor Neurons / Q000502:physiology*; D009048:Motor Skills / Q000502:physiology; D009132:Muscles / Q000294:innervation*