神經(jīng)纖維(nerve fiber)由軸突或感覺神經(jīng)元的長突起(統(tǒng)稱軸索)及包在外表的神經(jīng)膠質(zhì)細胞(神經(jīng)膜細胞或少突膠質(zhì)細胞)構(gòu)成。神經(jīng)纖維分有髓神經(jīng)纖維和無髓神經(jīng)纖維兩種。(一)有髓神經(jīng)纖維周圍神經(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] >>