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閒聊 => 職場甘苦談 => 主題作者是: jlee42 於 五月 06, 2026, 08:12 AM

標題: 大腦如何消除恐懼記憶
作者: jlee42五月 06, 2026, 08:12 AM
研究人員首次在人類大腦中確認了恐懼記憶消退相關的腦信號。 通過植入電極並結合先進的表徵相似性分析技術,他們發現當先前的負面刺激被重新學習為安全信號時,杏仁核的θ波活動顯著增強。
研究發現這類消退記憶具有高度上下文特異性——這
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解釋了為何恐懼癥狀常在治療結束后復發。 該成果為恐懼相關障礙的治療開闢了新途徑,包括創傷后應激障礙(PTSD)和焦慮症。
關鍵發現:
研究團隊採用表徵相似性分析(RSA)技術,該方法能揭示腦區如何表徵資訊。 49名癲癇患者參與實驗,這些患者因治療需要已植入腦電監測電極。 實驗顯示:
"這解釋了為何患者離開治療環境後恐懼容易復發,因為消退記憶被存儲為獨特的特殊經歷",研究協調人Nikolai Axma
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cher教授強調。
研究同時揭示恐懼記憶與安全記憶的神經表徵競爭機制,為恐懼復現和消退提取等臨床現象提供了生理基礎。 該成果不僅深化了人類情景記憶機制的理解,也為焦慮障礙治療提供了重要啟示。
原始研究發表於《自然·人類行為》:"人類大腦恐懼記憶消退的表徵動力學"(Daniel Pacheco-Estefan等)。