神經(jīng)纖維(nerve fiber)由軸突或感覺(jué)神經(jīng)元的長(zhǎng)突起(統(tǒng)稱(chēng)軸索)及包在外表的神經(jīng)膠質(zhì)細(xì)胞(神經(jīng)膜細(xì)胞或少突膠質(zhì)細(xì)胞)構(gòu)成。神經(jīng)纖維分有髓神經(jīng)纖維和無(wú)髓神經(jīng)纖維兩種。(一)有髓神經(jīng)纖維周?chē)窠?jīng)系統(tǒng)中的有髓神經(jīng)纖維,由軸索以及    （共 519 字）     [閱讀本文] >>