大白鼠松果体隐窝表面结构——扫描电镜研究

THE SURFACE STRUCTURE OF THE PINEAL RECESS IN RAT:A SCANNING ELECTRON MICROSCOPE STUDY

应用扫描电镜观察大白鼠松果体隐窝的表面结构。从隐窝的周边到中央部,按照纤毛和微绒毛分布的情况,将其分成外周带、过渡带和中央带3个区域。外周带上,成簇状的纤毛中散在分布外形不同的室管膜上细胞。过渡带介于外周带与中央带之间,纤毛明显减少,可见口径大小不一的小孔,有梭形的神经元样室管膜上细胞和成束的神经纤维,纤维的末端为结状膨大。中央带表面为稀疏的微绒毛,出现无纤毛、无微绒毛的平滑区域。有圆形的室管膜上细胞和梭形的神经元样室管膜上细胞;单根行走的神经纤维;豆芽状的单根纤毛,成串排列的球形突起结构。本文对松果体隐窝的表面结构与深部松果体之问的关系进行了讨论。

The surface structure of the pineal recess in rat (Sprague-Dawley) was observed by using scanning electron microscope.Because of the distribution of the cilia and microvilli shows a regular changes from peripheral area to central area in the recess,the surface of the recess can be divided into peripheral,transitional and central zone.In the peripheral zone,there are supraependymal cells in different appearance among those tufted cilia.The transitional zone is between peripheral and central zone.The cilia in this zone are fewer than those of the peripheral zone.We have observed the neuron-like suprae- pendymal cell with a splndle shaped cell body and numerous small holes as well as supraependymal nerve fibers in the floor of this zone.The ending of the nerve fiber is varicose.Some smooth areas devoid of cilia and microvilli were present in the central zone.There are also neuron like cells with slender processes,round supraependymal cell,some fine crisscrossing fibers and some sprouted cilia.A cluster of bleb-like structures are present in this zone.The relations between the surface of the recess and the pineal gland are discussed.