破裂ニューロンの緩やかな振動を維持するために不可欠な負の抵抗特性

W A Wilson, H Wachtel

Science (New York, N.Y.)

|December 6, 1974

まとめ

アプリシアの神経細胞の負の抵抗は,リズム的な爆発を可能にします. この電気的特徴は,ピークの値以下で観察され,ニューロンの振動に不可欠であり,温度に依存し,爆破が停止すると消えてしまいます.

科学分野:

神経科学は神経科学である.
計算神経科学とは
電気生理学電気生理学

背景:

ニューロンの振動は,脳の機能にとって根本的なものです.
アプリジアのニューロンが爆発すると,リズミカルな電気的活動が表れます.
破裂のイオンメカニズムを理解することは鍵です.

研究の目的:

Aplysiaのニューロン振動の基礎となる電気的特性を調査するために.
神経突破における負の抵抗の役割を決定する.
これらのニューロンの負の抵抗の温度依存性を調べるために.

主な方法:

ステップコマンドによる電圧クランプ技術.
電流-電圧 (I-V) 曲線の分析.
ニューロン活動の温度操作.

主要な成果:

安定状態の負の抵抗特性は,AplysiaのI-V曲線で,スパイク値を下回るニューロンを破裂させることが確認されました.
この負の抵抗が,膜ポテンシャルの不安定性と緩やかな振動の根底にある.
ネガティブな抵抗は,破裂細胞に存在し,静かな細胞には存在せず,温度誘発の破裂活動と相関していました.

結論:

ネガティブレジスタンスの存在は,Aplysiaのニューロンが爆発するニューロンのニューロン振動を可能にするために不可欠です.
負の抵抗がないと,破裂が起こりません.
温度が,ネガティブレジスタンスと,その後のニューロンの破裂の発達に直接影響する.

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