Ataxic hemiparesis syndrome clinical and CT study of 20 new cases.

Twenty patients suffering from ataxic hemiparesis caused by lacunar infarcts were studied using computerized tomography. Supratentorial lesions were found in nineteen patients (95%) while subtentorial lesion was found in only one patient (5%). In all cases the lesions were localized along the corticopontine pathways, making the hypothesis of injury to this pathway the most valid explanation of ataxia.