Koprla E C
Department of Physics, the University of Calgary, Alberta, Canada.
Acta Physiol Hung. 1988;71(3):371-82.
An electron and light microscopic study was performed to elucidate the structure of area M, an area on the ventral surface of the medulla oblongata which participates in the central respiratory control of the cat. We found no particular morphological barriers to fluid transport from the cerebrospinal fluid space towards the capillaries of this area. The astroglial contacts proved to be mostly gap junctions; furthermore, no tight junctions could be found here. Multipolar ganglion cells could be localized at a depth of 400-800 micron. These cells form numerous synaptic contacts with thin, unmyelinated axons running superficially, parallel to the pial surface in area M. Our findings support the contention that the ventral chemosensitive areas of the medulla oblongata are influenced by the chemical constitution of the cerebrospinal fluid.
进行了一项电子显微镜和光学显微镜研究，以阐明延髓腹侧表面的区域M的结构，该区域参与猫的中枢呼吸控制。我们发现，从脑脊液间隙向该区域的毛细血管进行液体运输不存在特殊的形态学屏障。星形胶质细胞接触大多被证明是缝隙连接；此外，在这里未发现紧密连接。多极神经节细胞可定位于400 - 800微米的深度。这些细胞与在区域M中平行于软脑膜表面浅层运行的细的无髓鞘轴突形成大量突触接触。我们的研究结果支持这样的观点，即延髓腹侧化学敏感区域受脑脊液化学组成的影响。
