中枢神経系伝導路研究に対する分裂線法の応用 : 錐体路の追跡を指標として
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概要
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Based on Prof. Nakayama's view (1956) that the splitting line system, produced by penetration of needle with India ink along the main fiber fascicle of the tissue, is the manifestation of the growth direction of various tissues and the irregular splitting lines show the sign of disturbance thereto, and also on the presumption that the growth of nerve fibers plays the chief role in the determination of the central nervous system structure and their growth, and the trace of growth of the nerve fibers should be regarded as the line system of the splitting lines, the author presumed that the splitting lines of the white substance of brain indicates the direction of the nerve fibers in that area, and the line system exhibits the nervous tracts. Using an extracted brain without pathological portion of a grown-up human, and getting the specimens (4mm to 2.5mm thick) cut off from frontal, sagittal and horizontal directions with the frontooccipital-pol line and longitudinal fissure of cerebrum as the datum, the author applied the penetration of needle with India ink with the well studied pyramidal tract as the guide, and have obtained the following conclusions : 1. The lower part of the line systems from the precentral gyrus runs toward posterior mesial, turning its direction above the lentiform nucleus, and flows into the internal capsule knee or posterior crus. The upper part of them runs toward the mesial lower part and becomes the laterally convex arched line system group at the semioval center, and its lower end flows into the posterior crus of the internal capsule. The line system inside the internal capsule is seen as the arched line system group approximately aligned with the direction of the internal capsule, and passes through the central part of cerebral crus via the external area out of the hypothalamus. As it enters the bridge, it becomes the line system group scattering radially, and lowers down crossing with the transversal line system group in the bridge. The line systems staying in the bridge in the course of passage are seen at the abdominal inner part and dorsal outer part of the basal portion of bridge. The downward line systems get together again at the lower end of the bridge and lowers down through the pyramis of medulla oblongata, and those at the dorsal side of pyramis cross at the center from right and left directions, and those at the abdominal side are seen to go right down through the pyramis. 2. The splitting line systems from the precentral gyrus are observed to be uniformly parallel in their passage, and no sagittal nor transversal disorder is seen, indicating the nerve fibers are bundled together. They run in regular arrangement from lower to upper portion, from front to rear of the knee and posterior crus inside the internal capsule, and the frontal portion runs through the mesial side and the rear portion runs through the exteranl side in the central part of cerebral crus, taking the similar positions in the bridge, too. Above observations apparently show the passage of pyramidal tract and the notion of functional somatotopic localisation as stated in the text book, leading to the belief that the splitting line system method performs a great role in the research of the nerve tracts of the central nervous system.
- 九州歯科学会の論文
- 1977-03-31
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- 中枢神経系伝導路研究に対する分裂線法の応用 : 錐体路の追跡を指標として : 主論文の要旨
- 中枢神経系伝導路研究に対する分裂線法の応用 : 錐体路の追跡を指標として