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Pontine Versus Capsular Pure Motor Hemiparesis
Neurol 43:2197-2201, Nighoghossian,N.,et al, 1993
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Article Abstract
We prospectively studied 21 patients with pure motor hemiparesis(PMH).CT showed a capsular lesion consistent with the clinical syndrome in 15 patients(71%)and was repeatedly negative in the remaining six(29%).In all six patients with repeatedly negative CT,MRI showed a pontine paramedian infarct as the notable cause of PMH.Clinical findings could not definitely distinguish between capsular and pontine PMH,but the combination of dysarthria and a history of previous transient gait abnormality or vertigo favored a pontine location.Outcome at 3 months was characterized by persistent,moderate to severe disability in 86%of patients with pontine PMH versus 46%in capsular PMH.Based on MRI and magnetic resonance angiographic findings,the presumed mechanism of pontine ischemic lesions was a lacunar process in most instances(86%).
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CAT scan
CAT scan,abnormal
CAT scan,false negative
cerebrovascular accident
internal capsule
lacunar infarction
misdiagnosis
MRI
MRI,abnormal
pons,infarction of
pons,lesion of
prognosis
pure motor hemiplegia
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