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Hemorrhages involved the thalamus, pons, internal capsule, or cerebral cortex. MR imaging revealed thalamic PSS was located in the ventral posterior lateral (VPL) or ventral posterior medial (VPM) nucleus; a lesion producing a thalamic ch eiro-oral syndrome was situated on the border between the VPL and VPM. Pontine PSS involved the medial lemniscus together with the ventral trigeminothalamic tract, sparing the anterior and lateral spinothalamic tracts. Accordingly, pontine PSS, but not thalamic PSS, selectively affected vibration and position sense while leaving pinprick and temperature perception intact, and oral sensory involvement was bilateral when cheiro-oral syndrome had a pontine origin. MR imaging revealed hemorrhage in the pos tcentral gyrus in the cortical variety of PSS and in the posterior part of the posterior limb (thalamocortical sensory pathway) in PSS of internal capsular origin. The postcentral gyral lesion impaired stereognosis and graphesthesia. Focal hemorrhages c an lead to purely sensory stroke syndromes, and the clinical deficits are fairly well linked with the locations of the bleeds. |
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brainstem,hematoma
CAT scan,abnormal
Cheiro-oral syndrome
cortical hemorrhage
hemorrhage,thalamic
internal capsule
intracerebral hemorrhage
intracerebral hemorrhage,small
MRI
MRI,abnormal
pontine hemorrhage
pure sensory stroke
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