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Localization of cerebral area of Broca on the coronal MR imaging
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- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF RADIOLOGY
- Issue:
- 1
- DOI:
- 10.3760/j.issn:1005-1201.2002.01.006
- Key Word:
- 磁共振成像;脑;解剖学,横断面
Abstract： 目的为MR冠状面图像精确定位大脑额叶内微小占位性病变及脑功能的影像学研究提供断层解剖学依据.方法选用成年男性头部标本30例和活体健康成年男性6例,以经连合间线中点的垂线为基线,获得4 mm层厚的颅脑连续冠状面MR图像.将扫描后的头部标本,开颅取脑,重要脑回涂以不同颜色,切制成与MR扫描一致的脑断层标本.把标本与相应MR图像对照观察、统计,确定Broca区在冠状面上的定位.结果 (1)在胼胝体膝首次出现的断面上,外侧沟前支的出现率:左侧73%、右侧63%,直而倾斜,易于辨认;(2)在侧脑室前角首次出现的断面上,双侧外侧沟前支的延长线呈钝角相交于胼胝体膝上方;(3)在胼胝体嘴首次出现的断面上,额下回主要为三角部,其出现率:左侧77%,右侧87%;(4)在豆状核首次出现的断面上,外侧沟前支消失,额下回岛盖部的出现率左侧80%、右侧83%.结论 (1)外侧沟前支在胼胝体膝首次出现的断面上显示清晰,直而倾斜;(2)侧脑室前端出现时,双侧外侧沟前支的延长线呈钝角相交于胼胝体膝上方;(3)豆状核出现时,外侧沟前支消失,额下回三角部后方出现的纵行脑沟为外侧沟升支;(4)纵行的中央前沟出现于额下回岛盖部后方,为Broca区的后界.
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