Erhardt H, Meinel W
Gegenbaurs Morphol Jahrb. 1983;129(6):783-98.
The Reissner's fibre (RF) in the canalis centralis of the spinal cord was studied with the aid of transmission and scanning electron microscope in Tupaia, Cebus, Sarmiri, Macaca, Alouatta, Ateles, Callithrix and Callicebus. The RF of the primates is structurally not different from the corresponding structure of other chordates. The diameter of the RF is slightly increasing in the canalis direction. The increase of the diameter varies between 2 and 5 micron. It is assumed that the increase is brought about by the inclusion of cell debris into the fibre. Material which definitely does not belong to the RF is found in the cerebrospinal fluid (CSF) of the canalis centralis and occasionally it adheres to the surface of the fibre. This material appears either as amorphous flocculent substances, the granulation of which differs in both density and size of the granula or as vesicles. If the material makes contact with the RF, a membrane-like structure may appear which is a condensation restricted to the area of the contact between material of different viscosity and granulation. The origin of this variable material is still not clarified. According to our observations, it is probably sequestrated material from ependymal cells. It is not a secretion as sometimes assumed since the intracellular processes of the synthesis of the secretion have not been observed.
借助透射电子显微镜和扫描电子显微镜，对树鼩、卷尾猴、松鼠猴、猕猴、蛛猴、绒毛蛛猴、狨猴和伶猴脊髓中央管中的赖氏纤维（RF）进行了研究。灵长类动物的RF在结构上与其他脊索动物的相应结构并无差异。RF的直径沿中央管方向略有增加。直径的增加幅度在2至5微米之间。据推测，这种增加是由于纤维中包含了细胞碎片所致。在中央管的脑脊液（CSF）中发现了肯定不属于RF的物质，且偶尔会附着在纤维表面。这种物质要么表现为无定形絮状物质，其颗粒化在颗粒的密度和大小方面都有所不同，要么表现为小泡。如果这种物质与RF接触，可能会出现一种膜状结构，这是一种局限于不同粘度和颗粒化物质接触区域的凝聚物。这种可变物质的来源仍未阐明。根据我们的观察，它可能是室管膜细胞的隔离物质。它并非如有时所认为的那样是一种分泌物，因为尚未观察到分泌合成的细胞内过程。
