Van Vossel A, Van Vossel-Daeninck J
Cell Tissue Res. 1984;237(1):149-54. doi: 10.1007/BF00229210.
In the pars distalis of the hypophysis of adult Rana temporaria, three types of nerve-fiber profiles were found at two distinct sites, in both lateral parts of the bordering regions of the anterior lobe with the intermediate lobe of the hypophysis. The first type of nerve-fiber profile consists of bundles of very fine axonal elements (diameter: less than 0.7 micron). The second type is formed by larger nerve fibers (diameter up to 4 microns) containing a few neurosecretory granules of approximately 100 nm. The third type of nerve-fiber profile resembles the second type but these nerve fibers make synaptoid contacts on at least two different types of glandular cells. The possible functional significance of these nerve fibers in the pars distalis is discussed. No nerve fibers were found in the central part of the bordering region of the pars distalis with the intermediate lobe, at the bordering region with the median eminence and with the neurohypophysial stalk, and in all other parts of the pars distalis.
在成年林蛙脑垂体远侧部，在前叶与脑垂体中间叶相邻区域的两侧，于两个不同部位发现了三种类型的神经纤维形态。第一种类型的神经纤维形态由非常细的轴突成分束组成（直径：小于0.7微米）。第二种类型由较大的神经纤维形成（直径达4微米），含有一些直径约100纳米的神经分泌颗粒。第三种类型的神经纤维形态与第二种相似，但这些神经纤维在至少两种不同类型的腺细胞上形成类突触联系。讨论了这些神经纤维在远侧部可能的功能意义。在远侧部与中间叶相邻区域的中央部分、与正中隆起和神经垂体柄相邻的区域以及远侧部的所有其他部位均未发现神经纤维。
