神經(jīng)纖維(nervefiber)是由神經(jīng)元的長突起外包膠質(zhì)細胞所組成。神經(jīng)纖維的功能是傳導(dǎo)神經(jīng)沖動。根據(jù)包裹軸突的膠質(zhì)細胞是否形成髓鞘,神經(jīng)纖維可分有髓神經(jīng)纖維和無髓神經(jīng)纖維(圖2-41)。圖2-41周圍神經(jīng)纖維有髓神經(jīng)纖維:軸突表面    （共 646 字）     [閱讀本文] >>