Disruption of Memory Reconsolidation Erases a Fear Memory Trace in the Human Amygdala: An 18-Month Follow-Up.

Disruption of Memory Reconsolidation Erases a Fear Memory Trace in the Human Amygdala: An 18-Month Follow-Up.
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DOI:
10.1371/journal.pone.0129393
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发表时间:
2015
期刊:
影响因子:
3.7
通讯作者:
Fredrikson M
Fredrikson M
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Björkstrand J;Agren T;Frick A;Engman J;Larsson EM;Furmark T;Fredrikson M

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恐惧记忆可以通过重新激活,然后中断重新巩固而减弱。最近,我们使用功能性磁共振成像发现,基底外侧杏仁核中的条件性恐惧记忆痕迹的再激活和再巩固预测了随后两天内的恐惧表达,而再激活后被破坏的再巩固则废除了记忆痕迹并抑制了恐惧。在这项后续研究中,我们表明,行为效果持续超过18个月,反映在上级重新收购后,未中断,相比中断重新巩固,并在基底外侧杏仁核的神经活动,代表最初的恐惧记忆预测返回的恐惧。我们的结论是,破坏再巩固具有长期持久的行为影响,并可能永久消除杏仁核依赖性记忆的恐惧成分。
Fear memories can be attenuated by reactivation followed by disrupted reconsolidation. Using functional magnetic resonance imaging we recently showed that reactivation and reconsolidation of a conditioned fear memory trace in the basolateral amygdala predicts subsequent fear expression over two days, while reactivation followed by disrupted reconsolidation abolishes the memory trace and suppresses fear. In this follow-up study we demonstrate that the behavioral effect persists over 18 months reflected in superior reacquisition after undisrupted, as compared to disrupted reconsolidation, and that neural activity in the basolateral amygdala representing the initial fear memory predicts return of fear. We conclude that disrupting reconsolidation have long lasting behavioral effects and may permanently erase the fear component of an amygdala-dependent memory.
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