后丘脑动脉的显微解剖及其微血管构筑

用手术显微镜观测了４８例成人后丘脑的动脉，并用墨汁明胶灌注，厚片透明，碱性磷酸酶染色示血管内皮及甲酯铸型法，在体视显微镜和扫描电镜下观察了１４例胎儿后丘脑的微血管构筑。后丘脑的动脉分为内侧膝状体丘脑动脉，外侧膝状体丘脑动脉和膝状体间丘脑动脉。

MICROSURGICAL ANATOMY OF THE ARTERY OF METATHALAMUS AND ITS MICROVASCULAR ARCHITECTURE

The arteries of 48 adult metathalamus were observered and measured by the operation microscopy. Under the stereoscope and scanning electron microscope, the microvasculature of 14 metathalamus of fetuses were studied with the methods of thick section transparency, alkaline phosphatase staining and methacrylate cast. The arteries of the metathalamus were divided into the medial geniculothalamic artery, the lateral geniculothalamic artery and the intergeniculothalamic artery. The smaller branches of the former two were distributed in the medial and lateral geniculate bodies, the larger branches and the intergeniculothalamic artery were distributed mainly in the thalamic pulvinar. The capillary arrangement of the lateral geniculate body was chequered with high and low density in layers, which was related to its neural structure. Capillaries of the medial geniculate body were dense, not arranged in layers. The microvascular cast of the metathalamus was similar to that of the thalamus. The arterioles branched at an acute angle. The venules were generally solitary or one venule was surrounded by several arterioles. The capillary anastomoses and precapillar anastomoses were discovered.