Feig S, Harting J K
Department of Anatomy, University of Wisconsin, Madison 53706.
Brain Res. 1992 Nov 13;595(2):334-8. doi: 10.1016/0006-8993(92)91068-p.
The normal ultrastructure of the parabigeminal nucleus and the morphology and synaptic relationships of tectoparabigeminal terminals have been examined. Five different morphological types of terminals have been observed within the parabigeminal nucleus. Three of these profiles contain round vesicles and make asymmetrical synapses, while two contain pleomorphic vesicles and make symmetrical synapses. Electron microscopic autoradiographic data indicate that labeled tectoparabigeminal terminals represent only one of the three profiles containing round vesicles. Such terminals are primarily presynaptic to dendritic shafts, and several labeled profiles have been observed presynaptic to the same dendrite.
已对副视束核的正常超微结构以及顶盖-副视束终末的形态和突触关系进行了研究。在副视束核内观察到了五种不同形态类型的终末。其中三种形态的终末含有圆形囊泡并形成不对称突触，而另外两种含有多形性囊泡并形成对称突触。电子显微镜放射自显影数据表明，标记的顶盖-副视束终末仅代表含有圆形囊泡的三种形态中的一种。此类终末主要位于树突干的突触前，并且在同一树突的突触前观察到了多个标记的形态。
