…Nerve signals are transmitted from nerve cell to nerve cell along their processes in the brain and spinal cord, and information is processed in the brain and spinal cord. The cell membranes of excitable tissues also have the property of being stimulated by chemical substances, causing fluctuations in membrane potential (chemical excitation). At the junctions between nerve cells (synapses), nerve signals are first converted from electrical pulses into chemical substances (neurotransmitters), then converted back into electrical pulses through a process of chemical excitation. … *Some of the terminology explanations that mention "chemical excitement" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…神経信号は脳,脊髄の中でも神経細胞から神経細胞へとその突起に伝えられ,これによって脳,脊髄の情報処理が行われる。興奮性組織の細胞膜には,このほか化学的な物質が刺激となって膜電位の変動(化学的興奮)を起こす性質もある。神経細胞と神経細胞の継ぎ目(シナプス)では神経信号は電気パルスからいったん化学物質(神経伝達物質)に転換され,化学的興奮の過程を経て再び電気パルスに戻される。… ※「化学的興奮」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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