目的探讨脑灰质异位症（GMH）的MR I诊断及鉴别诊断。
Objective To evaluate the role of MRI in diagnosis and differential diagnosis of gray matter heterotopia(GMH).
目的：提出脑灰质异位症的M R I诊断分型，提高对本病的认识。
Objective: to have some understanding of MRI diagnostic typing of brain gray matter heterotopia.
方法：采用功能磁共振成像技术对3例拟行手术治疗的灰质异位且伴癫痫症状的患者进行对指运动任务下的脑区反应观察。
Methods: fMRI was used to localize the areas of motor activation in 3 patients with heterotopic gray matter who all suffered from epilepsy and prepared to be treated by surgery.
带状异位在MRI上表现为一个平滑的灰质带位于脑室和皮质之间，中间夹以脑白质。
Band heterotopia is diagnosed by visualization on MRI of a smooth layer of gray matter separated from the cortex and ventricles by white matter.
带状异位在MRI上表现为一个平滑的灰质带位于脑室和皮质之间，中间夹以脑白质。
Band heterotopia is diagnosed by visualization on MRI of a smooth layer of gray matter separated from the cortex and ventricles by white matter.
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