Williams V
Am J Anat. 1975 Dec;144(4):421-31. doi: 10.1002/aja.1001440403.
The external glial limiting membrane of the cerebral cortex appears to be a complete astrocytic mantle covering the pial surface of the molecular layer. It consists of flattened cell bodies arranged singly or in small groups spaced about 100 mu apart and multitudes of interdigitating processes arrayed in layers. The glial mantle is thicker in the sulci than on the gyri. It is covered externally by a basal lamina which is associated with collagenous fibrils and cells of the pia mater. The extracellular space in aldehyde-perfused material appears as a regular, electron-lucent interval 150 A wide between adjacent cell membranes. Gap junctions are frequently encountered in the external glial limiting membrane; desmosomes are present between astrocytic processes but are seen much less often.
大脑皮质的外胶质界膜似乎是覆盖分子层软膜表面的完整星形胶质细胞套。它由单个或成小群排列的扁平细胞体组成，细胞体间隔约100微米，还有大量分层排列的相互交错的突起。胶质套在脑沟处比脑回处厚。其外部覆盖有基膜，该基膜与软脑膜的胶原纤维和细胞相关。在醛灌注材料中，细胞外间隙表现为相邻细胞膜之间宽150埃的规则、电子透明间隔。间隙连接在外胶质界膜中经常出现；桥粒存在于星形胶质细胞突起之间，但较少见到。
