…That is, (1) the cell body (soma) that surrounds the nucleus, (2) the dendrites (dendrites) that transmit excitation toward the cell body, and (3) a single axon (although it has many branches) that sends excitation away from the cell body. When a neuron generates a spike in the body, an impulse is first formed at the beginning of the axon (axon hillock). At the end of the axon (axon terminal), the excitation is transmitted to the next neuron. … *Some of the terminology that mentions "axon-hillock" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…すなわち,(1)核を取り囲む細胞体soma,(2)興奮を細胞体のほうへ伝える樹状突起dendrites,(3)興奮を細胞体から送り出す1本の軸索axon(ただし,分枝は多い)である。生体内でニューロンがスパイクを発生するときには,まず軸索の起始部(軸索小丘axon‐hillock)のところからインパルスが形成される。また,軸索の末端(軸索終末axon terminal)では,次のニューロンに興奮の伝達が行われる。… ※「axon-hillock」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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