Ataxic hemiparesis from small capsular hemorrhage. Computed tomography and somatosensory evoked potentials
E. Mori, A. Yamadori, Y. Kudo and M. Tabuchi
We studied three cases that fit the clinical syndrome of ataxic
hemiparesis. Computed tomography revealed small hemorrhages of the
posterior limb of the internal capsule in all the cases, and somatosensory
evoked potential studies predicted a disturbance of the lemniscal pathway
from the thalamus to the parietal sensory cortex without demonstrable
sensory loss. These results suggested that ataxia of the contralateral
limbs following capsular lesion might result from a disruption of the
thalamocortical sensory projection. The site of the lesion, the pathologic
cause, and the underlying mechanism of ataxia are not necessarily
homogeneous within the syndrome.
