目的 探讨人大脑半球顶叶外侧面的脑回形态。 方法 肉眼观察、游标卡尺测量60例（120侧）福尔马林固定人脑顶叶脑回。结果 顶叶
外侧面可见恒定的隆凸，定位于中央后回中、下1/3交界处后方，面积在2cm×2cm至4.5cm×4.5cm的范围；体表投影在耳廓上端上方稍后约3cm处。
主要由缘上回组成，该脑回呈多种形态，或呈弧形突向后上方，或为短脑回突入外侧沟末端，或同时突向后上方和前下方(外侧沟末端)等。当隆
凸明显时，中央前、后回下部被推向前方稍弯，上部相对向后，整体呈s形。〖HTH〗 结论 大脑半球顶叶外侧面存在一个恒定由缘上回为主构成
的隆凸，可从颅、内外进行定位。

Objective To understand the gyri shape of parietal lobe convexity in human brain. Methods The configuration of
gyri on the lateral surface of the parietal lobe of 60 formalinfixed cerebral hemispheres was observed by naked eyes, and
measured with vernier caliper.Results There was a protuberance on the convexity of parietal lobe, posterior to lower portion
of postcentral gyrus. The area of the protuberance was about 2cm×2cm to 45cm×45cm, 3cm above auricle. The protuberance
mainly consisted of the supramarginal gyrus, which was of various shapes arched superoposteriorly, or was a short gyrus dropped
superoposteriorly and inferiorly. When the protuberance more obviously protruded,the lower portions of the precentral and
postcentral gyri were pushed forwards and their upper portions were pushed backwards thus the whole shape of the precentral
gyrus looked and postcentral gyrus looked like “s” shape. Conclusion There is a constant protuberance in the parietal lobe
convexity which can be located from the structures inside and outside of skull.