…Preganglionic neurons that synapse with postganglionic neurons in autonomic ganglia are acetylcholineergic neurons that use acetylcholine as a chemical transmitter, whereas postganglionic neurons that directly connect to effector organs are either acetylcholineergic or noradrenergic. The system that connects to noradrenergic postganglionic neurons is called the sympathetic nervous system, and the system that connects to acetylcholineergic postganglionic neurons is called the parasympathetic nervous system. The cell bodies of the output neurons (preganglionic neurons) of the human sympathetic nervous system are mainly concentrated in the lateral horn (intermediate lateral nucleus) of the thoracic and upper lumbar spinal cord. … *Some of the terminology that refers to "sympathetic nervous system" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…自律神経節で節後ニューロンとシナプス結合する節前ニューロンが,アセチルコリンを化学伝達物質とするアセチルコリン作動性ニューロンであるのに対して,効果器に直接に連絡する節後ニューロンには,アセチルコリン作動性のものと,ノルアドレナリン作動性のものとがある。ノルアドレナリン作動性の節後ニューロンに連絡する系を交感神経系sympathetic nervous systemと呼び,アセチルコリン作動性の節後ニューロンに連絡する系を副交感神経系parasympathetic nervous systemという。ヒトの交感神経系の出力ニューロン(節前ニューロン)の細胞体は,胸髄と腰髄上部の主として側角(中間外側核)に集合している。… ※「sympathetic nervous system」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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