Helgason C M, Wilbur A C
Department of Neurosciences, University of Illinois College of Medicine, Peoria 61656-1649.
Stroke. 1990 Jan;21(1):24-33. doi: 10.1161/01.str.21.1.24.
Twenty-three patients with hypesthetic ataxic hemiparesis underwent computed tomography or magnetic resonance imaging. Twenty-two patients had infarcts of lacunar or slightly larger size in the contralateral posterior limb of the internal capsule. In 15 patients the infarct extended superiorly into the adjacent paraventricular region, and in seven it extended into the lateral thalmus. In eight patients the infarct was limited to the posterior limb of the internal capsule, and in only two patients was an ipsilateral to capsular pontine lacune found. Despite a location similar to that of pure motor and pure sensory lacunar stroke, hypesthetic ataxic hemiparesis correlates with larger infarcts, most often located in the posterior medial superior territory of the anterior choroidal artery. Some infarcts appeared to be localized immediately posterolateral to this region, in the posterior cerebral artery territory. The presence and extent of infarction is better detected by the addition of magnetic resonance imaging to computed tomography.
23例感觉减退性共济失调性偏瘫患者接受了计算机断层扫描或磁共振成像检查。22例患者在对侧内囊后肢有腔隙性梗死或稍大的梗死灶。15例患者的梗死灶向上延伸至相邻的脑室旁区域，7例延伸至外侧丘脑。8例患者的梗死灶局限于内囊后肢，仅2例患者发现同侧脑桥被盖部腔隙。尽管感觉减退性共济失调性偏瘫的梗死部位与纯运动性和纯感觉性腔隙性卒中相似，但其与较大的梗死灶相关，梗死灶最常位于脉络膜前动脉后内侧上区域。一些梗死灶似乎位于该区域紧邻的后外侧，即大脑后动脉供血区。计算机断层扫描联合磁共振成像能更好地检测梗死的存在及范围。
