心臟受交感神經(jīng)及迷走神經(jīng)的支配,交感神經(jīng)起源于脊髓胸段1～5節(jié)的灰質(zhì)側角神經(jīng)元,在交感鏈換神經(jīng)元,再發(fā)出節(jié)后纖維到心臟。迷走神經(jīng)起源于延髓的迷走神經(jīng)背核,進入心臟后與心內(nèi)神經(jīng)節(jié)細胞發(fā)生突觸聯(lián)系,再發(fā)出節(jié)后纖維支配    （共 999 字）     [閱讀本文] >>