Hemihypokinesia after right hemisphere stroke.
We tested the hypothesis that the right hemisphere is dominant for motor activation of "intention." If the right hemisphere is dominant for intention and if intention is a prerequisite for movement, motor impairment should be worse after an infarct in the right hemisphere than in the left. We asked nine subjects with right and nine with left hemisphere infarcts to elevate each shoulder independently. Subjects with right hemisphere lesions had more trouble moving the contralateral shoulder. The data are consistent with the hypothesis that the right hemisphere is dominant for motor activation or intention.
Coslett
H B
HB
Department of Neurology, Temple University Hospital, Philadelphia, PA 19140.
Heilman
K M
KM
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001479:Basal Ganglia / Q000503:physiopathology; D001925:Brain Damage, Chronic / Q000503:physiopathology*; D002544:Cerebral Infarction / Q000503:physiopathology; D002561:Cerebrovascular Disorders / Q000503:physiopathology*; D004292:Dominance, Cerebral / Q000502:physiology*; D005260:Female; D006429:Hemiplegia / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009044:Motor Cortex / Q000503:physiopathology; D009046:Motor Neurons / Q000502:physiology; D009119:Muscle Contraction; D009132:Muscles / Q000294:innervation; D011712:Pyramidal Tracts / Q000503:physiopathology; D012782:Shoulder / Q000294:innervation; D014057:Tomography, X-Ray Computed