パラレルで対立する記憶の統合が 記憶の消滅の根底にある
Johannes Felsenberg1, Pedro F Jacob1, Thomas Walker1
1Centre for Neural Circuits and Behaviour, The University of Oxford, Tinsley Building, Mansfield Road, Oxford OX1 3SR, UK.
Cell
|September 25, 2018
まとめ
ハエは罰の免れを ポジティブな経験として記憶し 記憶の消し去りに 特定のドーパミナージックニューロンが必要です この過程で 異なった記憶が キノコの体から出る神経細胞に統合され 行動を誘導します
科学分野:
- 神経科学
- 動物 の 行動
- 記憶に関する研究
背景:
- 動物は連続した経験から学び 裏付けと矛盾する証拠を統合します
- 記憶の消去は 恐怖の反応を抑制し 予知的なシグナルを 罰なしに経験することで 様々な種で起こります
研究 の 目的:
- ドロソフィラの記憶喪失の ニューラルメカニズムを調査する
- 罰の免除が ポジティブな経験として 記憶されるかどうか
主な方法:
- ドロソフィラをモデル生物として利用した.
- 機能的イメージングを用いて,キノコの体の出力ニューロンネットワークにおける神経活動 (カルシウム痕跡) を観察した.
- ニューロンの接続を研究するために 光と超構造体解剖を応用した.
主要な成果:
- 特定のドーパミナージックニューロンが 特定されていて 嫌悪的な記憶の消失に 重要な役割を果たしています
- 同じニューロンネットワーク内の嫌悪性および食欲性絶滅記憶の両方の共存する細胞内カルシウム痕跡を観察した.
- 特定のニューロンの 絶滅によって引き起こされた可塑性が 以前から確立された 匂いの反応を中和させることを示した.
結論:
- ドロソフィラは罰の免れを ポジティブな経験として記憶しています
- パラレルで競合する記憶は キノコの体の出力ニューロンに組み込まれています
- 矛盾する出来事の記憶を蓄積し統合することで 学習した期待の正確さを追跡します
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