【摘要】 本文用不同年龄的人胚、胎儿、儿童及成人的脑干(连同部分小脑),作Cajal 1法镀银和硫堇染色的连续冠状、矢状和地平切面,观察三叉神经中脑核的分化、发育过程及其联系。三叉神经中脑核和根于坐高12.4—14毫米时出现于后脑内,自三叉神经入脑平面延至菱脑峡,顺界沟外侧伸延,沿途有少量细胞团簇。坐高56毫米时,中脑根及细胞已延至中脑上丘头端平面,经历菱脑时,并有纤维伸入小脑基部。此后的发育主要是细胞形态的变迁,胚胎时期的多极细胞渐渐转化为成长时的单极细胞,而且在同一发育时期,中脑核头段的细胞分化、发育较其后段的为晚。本文除证实前人所说中脑核和根与眼球外在肌的神经、面神经以及小脑有联系外,还发现中脑核细胞散在于后连合、后连合核和中介核内,并就此讨论了它的机能意义。更多还原

【Abstract】 Serial sections of human embryos and the brain stem together with cerebellum offetuses, young and adults were studied by Cajal I and Nissl methods for demonstratingthe development and connections of mesencephalic nucleus of the trigeminal nerve. It was found that at C.R. 12.4 mm the mesencephalic root with some scattered cellgroups made its appearance along the sulcus limitus from the entrance of the trigeminalnerve up to the isthmus region. At C.R. 56mm it extended into the midbrain regionand the base of the cerebellum. Later on, the root cells differentiated in a caudo-rostraldirection. They were therefore somewhat larger in its caudal part than those in the ros-tral. With the increase of age the morphology of the mesencephalic root cells alsochanged from the fetal multipolar type to the adult unipolar. The present study confirm the previous observations that the mesencephalic root hadconnections with some cranial nerves and the cerebellum. And in addition, some scat-tered mesencephalic root cells were found in the posterior commissure, in its nucleus andin the interstitial nucleus. Discussion on their functional significance were made.更多还原