Localization of hand motor activation in Broca's pli de passage moyen
Localization of hand motor activation in Broca's pli de passage moyen
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DOI：
10.3171/jns.1999.91.6.0903
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发表时间：
1999-12-01
影响因子：
4.1
通讯作者：
Reutens, D
中科院分区：
文献类型：
--
作者：
Boling, W;Olivier, A;Reutens, D
物体。本研究的目的是为手运动区确定一个可靠的表面标志，并证明它对应于中央前回的特定结构成分。本文回顾了12例磁共振成像结果正常的患者的正电子发射断层扫描(PET)对手运动功能的激活研究。每个患者都进行一次手的张开和闭合任务。利用计算机辅助三维重建所研究的每个半球的表面，评估手部运动区与皮质表面标志的关系。通过评估与附近结构的解剖关系，可以在大脑表面可靠地识别手部运动激活区。在确定中央沟后，可以看到额上回和额中回与中央前回成垂直角。中央前回的弯曲或膝部常见于额叶中上回之间，指向后方(向后凸起)。通过PET激活研究确定的手运动功能的位置是在这个后方指向膝尖处的中央沟内。中央前回膝部的顶端通向连接中央前回和中央后回的深皮质褶皱，并抬高中央沟的底部。这一深褶皱被Paul Broca描述为额顶前缘的纵沟，纵沟的前中央银行代表了手运动功能的解剖基础。对激活研究结果视而不见的观察者在接受使用指导后能够可靠地识别手运动区：这些表面地标。
Object. The object of this study was to identify a reliable surface landmark for the hand motor area and to demonstrate that it corresponds to a specific structural component of the precentral gyrusMethods. Positron emission tomography (PET) activation studies for hand motor function were reviewed in 12 patients in whom magnetic resonance imaging results were normal. Each patient performed a hand opening and closing task. Using a computer-assisted three-dimensional reconstruction of the surface of each hemisphere studied, the relationship of the hand motor area with cortical surface landmarks was evaluated.Conclusions. The region of hand motor activation can be reliably identified on the surface of the brain by assessing anatomical relationships to nearby structures. After identification of the central sulcus, the superior and middle frontal gyrus can be seen to arise from the precentral gyrus at a perpendicular angle. A bend or genu in the precentral gyrus is constantly seen between the superior and middle frontal gyrus, which points posteriorly (posteriorly convex). The location of hand motor function, identified using PET activation studies, is within the central sulcus at the apex of this posteriorly pointing genu. The apex of the genu of the precentral gyrus leads to a deep cortical fold connecting the pre- and postcentral gyri and elevating the floor of the central sulcus. This deep fold was de scribed by Paul Broca as the pli de passage fronto-parietal moyen, and the precentral bank of the pli de passage represents the anatomical substratum of hand motor function. Observers blinded to the results of the activation studies were able to identify the hand motor area reliably after instruction in using: these surface landmarks.