FURTHER OBSERVATIONS ON THE DEVELOPMENT AND CONNECTIONS OF THE MESENCEPHALIC NUCLEUS OF THE TRIGEMINAL NERVE IN HUMAN BRAIN
- VernacularTitle:人脑三叉神经中脑核的发育及其联系的再观察
- Author:
Chuwu TANG
;
Wenkuei WANG
- Publication Type:Journal Article
- From:
Acta Anatomica Sinica
1955;0(03):-
- CountryChina
- Language:Chinese
-
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.
