Matesz C
Department of Anatomy, University of Medicine, Debrecen, Hungary.
Acta Biol Hung. 1988;39(2-3):267-77.
The synaptology of the primary afferent vestibulocochlear fibers of the frog's nucleus vestibularis lateralis (NVL), nucleus cochlearis dorsalis (NCD) and nucleus saccularis (NS) was studied with the aid of cobalt labeling technique. On the basis of their sizes and morphological characters, two types of boutons could be distinguished. The type one large boutons making only axosomatic contacts were found in the NVL and NS. The form of contact in these boutons was mainly attachment plaque without vesicle accumulation in the contact zone. The second type of bouton having a smaller diameter and spheric vesicles, were engaged both in axosomatic and axodendritic synapses in all three nuclei studied. There was about the same number of axosomatic and axodendritic boutons in the NCD and NS; while the numerical distribution of type one and type two axosomatic boutons was similar in the NVL and NS. On the basis of our results it is suggested that the NS may be a transitory form between the NVL and NCD.
借助钴标记技术，对青蛙外侧前庭核（NVL）、背侧耳蜗核（NCD）和球囊核（NS）的初级传入前庭蜗神经纤维的突触学进行了研究。根据其大小和形态特征，可区分出两种类型的终扣。在NVL和NS中发现了仅形成轴体突触的第一种大型终扣。这些终扣中的接触形式主要是附着斑，接触区无囊泡聚集。第二种终扣直径较小，有球形囊泡，在所研究的三个核中均参与轴体和轴树突触。在NCD和NS中，轴体和轴树终扣的数量大致相同；而在NVL和NS中，第一种和第二种轴体终扣的数量分布相似。根据我们的研究结果，推测NS可能是NVL和NCD之间的一种过渡形式。
