Fomichev N I, Sotnikov O S
Morfologiia. 1993 Jul-Aug;105(7-8):72-84.
The glio-neuronal interrelations in the nerves, connective and ganglia were studied in the crayfish Astacus leptodactylus as a representative of invertebrates. The outer membranes of the ganglia, connectives and nerves are formed by specialized cells with morphological features of the loose connective tissue cells. In the ganglia between the outer membrane and the neuropile there is another type of the connective tissue cells--Leydig's 1st type cells. The sheaths of axon bundles in the connectives and neuropile are formed by the bodies and processes of glial cells. Their processes also cover solitary axons. The neuron bodies are surrounded by glial cells forming trophospongium. Axons of greater diameter are surrounded by a greater amount of glial layers. Specific features of the structure of myelin-like neurite sheaths were found. The ratio of the length of the membrane of gliocytes covering the neurite to the length of the neurite circle on sections of motor fibers of the nerve is 1:15.7; of sensory fibers of the nerve--1:2.1; of connective neurites--1:1.9; of axons inside the ganglion--1:0.4; in the neuropile--1:0.01.
以小龙虾细趾螯虾作为无脊椎动物的代表，对其神经、结缔组织和神经节中的神经胶质-神经元相互关系进行了研究。神经节、结缔组织和神经的外膜由具有疏松结缔组织细胞形态特征的特化细胞形成。在神经节的外膜和神经纤维网之间存在另一种结缔组织细胞——莱迪希第一型细胞。结缔组织和神经纤维网中轴突束的鞘由神经胶质细胞的胞体和突起形成。它们的突起也覆盖单个轴突。神经元胞体被形成营养海绵体的神经胶质细胞包围。直径较大的轴突被更多层神经胶质包围。发现了类髓磷脂神经突鞘结构的特异性特征。在神经运动纤维切片上，覆盖神经突的神经胶质细胞膜长度与神经突圆周长度之比为1:15.7；神经感觉纤维为1:2.1；结缔组织神经突为1:1.9；神经节内轴突为1:0.4；在神经纤维网中为1:0.01。
