Frederickson C J, Trune D R
J Comp Neurol. 1986 Oct 15;252(3):302-22. doi: 10.1002/cne.902520303.
The cytoarchitecture and saccular innervation of the mouse nucleus y were investigated by using Golgi, Nissl, and myelin stains and anterograde axonal transport of horseradish peroxidase. Nucleus y was found to be a compact group of cells in a small fiber-free region dorsal to the restiform body. Qualitative and morphometric analyses showed that most (75%) of the nucleus y neurons could not be reliably subdivided into morphologic subgroups, but varied continuously in soma size (15-25 microns), shape (fusiform to stellate), and number of dendrites (two to four), and had sparsely branched dendrites with an average of 3 to 4 spines per 10 microns of length. Three groups of cells that were identified morphometrically accounted for 10% (type I: large stellate cells), 9% (type II: long-dendrite cells), and 6% (type III: elongated soma cells) of the y neurons. Vestibular nerve axons transporting horseradish peroxidase after injury at their origin in the saccular neuroepithelium were found to form a dense terminal meshwork that was virtually co-extensive with the cytoarchitectonic boundaries of nucleus y. Nucleus y was distinguished from the overlying infracerebellar nucleus on the basis of anatomical, cytoarchitectural, and hodological features.
运用高尔基染色法、尼氏染色法、髓鞘染色法以及辣根过氧化物酶的顺行轴突运输法，对小鼠Y核的细胞构筑和球囊神经支配进行了研究。结果发现，Y核是位于绳状体背侧一个无纤维小区域内的紧密细胞群。定性和形态计量学分析表明，Y核中的大多数（75%）神经元无法可靠地细分为形态学亚组，而是在细胞体大小（15 - 25微米）、形状（梭形至星形）和树突数量（2 - 4个）方面连续变化，且树突分支稀疏，每10微米长度平均有3至4个棘。经形态计量学鉴定的三组细胞分别占Y神经元的10%（I型：大型星形细胞）、9%（II型：长树突细胞）和6%（III型：细长体细胞）。在球囊神经上皮起源处受伤后，运输辣根过氧化物酶的前庭神经轴突形成了一个密集的终末网络，该网络实际上与Y核的细胞构筑边界相互交织。基于解剖学、细胞构筑学和神经径路学特征，Y核与上方的小脑下核得以区分。
