Fermin C D, Igarashi M
Ann Otol Rhinol Laryngol. 1982 Jan-Feb;91(1 Pt 1):44-52. doi: 10.1177/000348948209100111.
The vestibular ganglia of adult squirrel monkeys (Saimiri sciureus) were studied with the aid of light and electron microscopy. The vestibular ganglia are formed by small and large neurons (perikarya). The perikarya's outermost surface is surrounded by 2-20 lamellae of compact myelin. The compact myelin sheath varies its thickness around one perikaryon. The sheath generally thins out i the vicinity of the axon hillock. Occasionally, the compact myelin transforms completely into loose myelin for a length of 2-5 mu. Two to eight lamellae of loose myelin usually face the cytoplasm of the neurons. This myelin arrangement is constant in the majority of the cells examined regardless of shape and/or size. Large myelinated perikarya form the majority of the ganglion cells. There are, however, a few neurons that lack a true compact myelin sheath. Others are surrounded by very few lamellae of loose myelin. The general morphology of the neurons was compared to the available literature on other species. Possible variation on the myelination pattern due to fixation differences, and variation on the perikaryal size due to the angle of cut irregular shape of the cells are also discussed.
借助光学显微镜和电子显微镜对成年松鼠猴（松鼠猴属）的前庭神经节进行了研究。前庭神经节由大小神经元（胞体）构成。胞体的最外表面被2至20层紧密髓鞘所包围。紧密髓鞘在一个胞体周围的厚度有所变化。该髓鞘通常在轴丘附近变薄。偶尔，紧密髓鞘会在2至5微米的长度内完全转变为疏松髓鞘。通常有2至8层疏松髓鞘面向神经元的细胞质。无论所检查细胞的形状和/或大小如何，这种髓鞘排列在大多数细胞中都是恒定的。大型有髓鞘胞体构成了神经节细胞的主体。然而，有少数神经元缺乏真正的紧密髓鞘。其他神经元则被极少数疏松髓鞘层所包围。将神经元的一般形态与关于其他物种的现有文献进行了比较。还讨论了由于固定差异导致的髓鞘形成模式的可能变化，以及由于细胞切割角度不规则形状导致的胞体大小变化。
