成人大脑顶枕沟在横断面上的定位  

Localization of adult cerebral parietooccipital sulcus on transverse section

作　　者：黄海辉[1] 刘树伟[2] 丁娟[2] 杨瑞铭[1] 康仲涵[1] 

机构地区：[1]福建医科大学人体解剖学与组织胚胎学系,福外350004 [2]山东大学医学院解剖学教研室

出　　处：《解剖学杂志》2002年第6期568-573,共6页Chinese Journal of Anatomy

摘　　要：目的:为了探讨大脑顶枕沟在横断面上的准确定位。方法:选用正常成人头部标本30例,以AC-PC线为基线,获取4mm层厚的连续横断层MR图像和脑断层标本。在连续断层标本上对顶枕沟的断面表现进行跟踪观察、测量和统计。结果:1.在AC-PC线断面上,顶枕沟的出现率左侧为16.7％、右侧为10％;在胼胝体压部首次切及的断面上,顶枕沟位于扣带回峡的后方,其出现率左侧为93.3％、右侧为90％,在扣带回峡和舌回交界处的深面可见深埋的楔回。2.在切及穹窿柱和透明隔断面上,顶枕沟后移,位于大脑半球后部内侧缘前、中1/3交点附近,其出现率左侧为100％、右侧为93.3％,沟的平均深度左侧为15.8mm、右侧为16.4mm,沟内一般有1～3支分支。3.在顶枕沟即将消失的断面上,大脑半球髓质的半卵圆中心上部的出现率左侧、右侧均为86.7％,扣带回即将消失,中央旁小叶尚未出现。结论:顶枕沟出现在前后连合平面至胼胝体即将出现的1～2个断面上,扣带回峡后方楔回的出现是顶枕沟首次出现的重要信号;当大脑半球出现半卵圆中心上部时,从扣带回顶部出现到中央旁小叶即将出现的1～2个断面,为顶枕沟消失的断面。Objective:To study the localization of the cerebral parieto-occipital sulcus. Methods:Serial transverse sections (4 mm) and MR images of adult cadavers brain specimens were prepared. The brain slices in correspondence with MR scan were parallel to the intercommissural line (AC-PC line). Results:(1)On the section through the intercommisural line,the appearing rate of the parieto-occipital sulcus was 16.7% on the left side and 10% on the right;On the section of the sple-nium of corpus callosum appearing for the first time, the appearing rate of the parieto-occipital sulcus was 93.3% on the left side and 90% on the right; Deep in the conjunction of the cingulate and lingual gyri was the cuneate gyrus. (2)On the section through the column of fornix and septum pellucidum,the parieto-occipital sulcus moved forward,its appearing rate was 100% on the left side and 93.3% on the right. It was 15.8 mm and 16.4 mm on left and right sides respectively. It had 1-3 branches. (3)On the section when theparieto-occipital sulcus disappeared,the superrior part of the semiovale center of the cerebral marrow appeared, with appearing rate 86.7% on the left and right;The cingulate gyrus would disappear and the paracentral lobule would appear. Conclusion;The parieto-occipital sulcus appears on the 1~2 sections between the intercommisural plane and the plane of the splenium of corpus callosum appearing for the first time, the appearing of the cuneate gyrus is the important signal. The parieto-occipital sulcus disappears on the 1-2 sections from the cingulate gyrus will disappear to the paracentral lobule will appear.

关 键 词：脑 顶枕沟 断层解剖学 

分 类 号：R322[医药卫生—人体解剖和组织胚胎学]