Experience-dependent modification of a central amygdala fear circuit.
Experience-dependent modification of a central amygdala fear circuit.
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DOI:
10.1038/nn.3322
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发表时间:
2013-03
影响因子:
25
通讯作者:
Li, Bo
中科院分区:
文献类型:
--
作者:
Li, Haohong;Penzo, Mario A.;Taniguchi, Hiroki;Kopec, Charles D.;Huang, Z. Josh;Li, Bo
The amygdala is essential for fear learning and expression. The central amygdala (CeA), once viewed as a passive relay between the amygdala complex and downstream fear effectors, has emerged as an active participant in fear conditioning. However, how CeA contributes to the learning and expression of fear is unclear. Here we show in mice that fear conditioning induces robust plasticity of excitatory synapses onto inhibitory neurons in the lateral subdivision of CeA (CeL). This experience-dependent plasticity is cell-specific, bidirectional, and expressed presynaptically by inputs from the lateral amygdala. In particular, preventing synaptic potentiation onto somatostatin-positive neurons impairs fear memory formation. Furthermore, activation of these neurons is necessary for fear memory recall and sufficient to drive fear responses. Our findings support a model in which the fear conditioning-induced synaptic modifications in CeL favor the activation of somatostatin-positive neurons, which inhibit CeL output thereby disinhibiting the medial subdivision of CeA and releasing fear expression.
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作者:
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