Yokota T, Hirashima F, Furukawa T, Tsukagoshi H, Yoshikawa H
Department of Neurology, Tokyo Medical and Dental University, Japan.
J Neurol. 1989 Feb;236(2):115-6. doi: 10.1007/BF00314408.
Four patients with palatal myoclonus (PM) were studied with magnetic resonance imaging (MRI). Increased signal intensity and bilateral enlargement of the inferior olives were recognized in two patients with bilateral PM, pontine haemorrhage and neuro-Behçet disease, and a similar olivary change on the contralateral side was noted in a case of pontine infarction with unilateral PM. These findings were consistent with the pathology. The changes were more obvious in proton density-weighted images than in T2-weighted images, which thus differ from the changes in common gliosis. The other patient with the syndrome of PM and progressive ataxia did not show any olivary change. These changes on MRI are considered to indicate pseudo-hypertrophy of the inferior olives, although this is not consistently shown by the imaging method.
对4例腭肌阵挛（PM）患者进行了磁共振成像（MRI）研究。在2例双侧PM、脑桥出血和神经白塞病患者中，发现下橄榄核信号强度增加且双侧增大，在1例单侧PM的脑桥梗死患者中，对侧也观察到类似的橄榄核改变。这些发现与病理学一致。质子密度加权图像上的改变比T2加权图像上更明显，这与常见胶质增生的改变不同。另1例患有PM和进行性共济失调综合征的患者未显示任何橄榄核改变。MRI上的这些改变被认为提示下橄榄核假性肥大，尽管成像方法并非始终能显示这一点。
