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

The surface structure of the pineal recess in rat (Sprague-Dawley) was observedby using scanning electron microscope.Because of the distribution ofthe cilia and microvilli shows a regular changes from peripheralarea to central area in the recess,the surface of the recess can be divided intoperipheral,transitional and central zone.In the peripheral zone,there aresupraependymal cells in different appearance among those tufted cilia.Thetransitional zone is between peripheral and central zone.The cilia in this zone arefewer 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 assupraependymal nerve fibers in the floor of this zone.The ending of the nerve fiberis varicose.Some smooth areas devoid of cilia and microvilli were presentin the central zone.There are also neuron like cells with slender processes,roundsupraependymal cell,some fine crisscrossing fibers and some sprouted cilia.Acluster of bleb-like structures are present in this zone.The relations between thesurface of the recess and the pineal gland are discussed.