Efferent nerve fibers

Japanese: 遠心性神経繊維 - えんしんせいしんけいせんい
Efferent nerve fibers

...For example, cats have 13 pairs of thoracic nerves, 7 pairs of lumbar nerves, and 3 pairs of sacral nerves, while frogs have a total of about 10 pairs of spinal nerves.
[Afferent and efferent nerve fibers]
Among the nerve fibers that make up the peripheral nerves, there are afferent fibers that conduct excitation from each part of the body to the central nervous system, and efferent fibers that conduct excitation from the central nervous system to each part of the body. In the spinal nerve area, afferent fibers enter the spinal cord from the dorsal side (rear), and this part is called the dorsal root. …

*Some of the terminology that refers to "efferent nerve fibers" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…例えばネコの胸神経は13対,腰神経は7対,仙骨神経は3対であり,カエルでは脊髄神経は全部で10対ほどである。
[求心性神経繊維と遠心性神経繊維]
 末梢神経を構成する神経繊維のなかには興奮を身体の各部から中枢神経系のほうへ伝導する求心性繊維(求心性神経繊維)centripetal fiberと,興奮を中枢神経系から身体の各部へと伝導する遠心性繊維(遠心性神経繊維)centrifugal fiberとがある。脊髄神経の領域では,求心性繊維は脊髄の背側(後方)から脊髄に入るが,この部分を後根という。…

※「遠心性神経繊維」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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