胼胝体膝

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；

Conclusion ( 1 ) The anterior ramus of lateral sulcus is presented on the section of the genu of corpus callosum appearing for the first time as a straight and inclined sulcus .

标记纤维自注射侧经胼胝体膝至对侧半球，其投射区与注射侧的投射区一致，但标记纤维比较稀疏。

Labeled fibers from the injection side passed through the genu of corpus callosum to the contralateral hemisphere , and the projection topography was basically similar to but less dense than that of the injection side .

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；

When the anterior horn of lateral ventricles appears , the extended lines of bilateral anterior rami of lateral sulcus intersect on the superior aspect of the genu of corpus callosum by obtuse angle .

从侧面看前驱与背线的过度阶段衔接适度。（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；

Pasterns show flexibility with a slight slope when viewed from the side . ( 2 ) When the anterior horn of lateral ventricles appears , the extended lines of bilateral anterior rami of lateral sulcus intersect on the superior aspect of the genu of corpus callosum by obtuse angle .