大脑皮层手运动区的形态学研究

目的:定位并分析手运动区域的形态学规律。方法:选取48名右手利健康成人志愿者进行头颅薄层MRI扫描,获得48名志愿者96个大脑半球的MRI横断位、矢状位及冠状位图像,对手运动区进行识别、定位,并观察分析其形态学规律。结果:手运动区域分7种类型:倒Ω型、ω型、ω内不对称型、ω外不对称型、曲线型、三叶草型和波浪型。男女、男性和女性左右侧大脑半球各型构成比差异均无统计学意义(P>0.05)。男性倒Ω型基底宽明显大于女性(P<0.01)。结论:完善手结运动区分型,为临床及实验研究识别中央前回提供便利条件。

Morphologic study of the hand motor cortex based on MRI

Objective:To locate and analyze the morphology features of the hand motor cortex. Methods:The brains of 48 right-handed healthy people were scanned using MRI. The MRI imagings of transection plane,sagittal plane,coronal plane from 96 cerebral hemispheres were collected,which was used to identify,locate and analyze the morphology features of the hand motor cortex. Results:The hand motor cortex were classified into the inverted omega, omega, medially nonsymmetric omega, laterally nonsymmetric omega, curve,clover and wave types. The differences of the constituent ratio of various types between male and female,and between bilateral cerebral hemispheres of male and female were not statistically significant(P>0. 05). The width of the inverted omega type in male was significantly more than that in female(P<0. 01). Conclusions:Improving the procentral knob motor cortex typing can provide the basis in identifing precentral gyrus.