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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。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 investigate the morphology of the gyrus in the lateral part of the parietal lobe of the human hemisphere. Methods Gross observation, vernier caliper measurement of 60 cases (120 sides) formalin fixed human parietal lobe of the brain back. Results The outer surface of the parietal lobe can be seen constant protuberance, located in the back of the central back, 1/3 junction behind the area in the range of 2cm × 2cm to 4.5cm × 4.5cm; body surface projection above the top of the ear later About 3cm Department. Mainly by the margin of the back composition, the brain showed a variety of morphological, or arc-shaped protruding back to the top, or back into the short cerebellum into the outer ditch end, or both at the same time after the top and bottom (outside the ditch). When the protuberances are conspicuous, the lower part of the front and back of the center is pushed slightly forward, the upper part is relatively backward, and the overall shape is s-shaped. Conclusion There is a constant protuberance in the lateral parietal lobe of the cerebral hemisphere formed by the margin of the upper limb, which can be located from the cranium, inside and outside.