Placing prediction into the fear circuit.
Placing prediction into the fear circuit.
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DOI:
10.1016/j.tins.2011.03.005
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发表时间:
2011-06
影响因子:
15.9
通讯作者:
Blair, Hugh T.
中科院分区:
文献类型:
--
作者:
McNally, Gavan P.;Johansen, Joshua P.;Blair, Hugh T.
Pavlovian fear conditioning depends on synaptic plasticity at amygdala neurons. Here we review recent electrophysiological, molecular, and behavioral evidence suggesting the existence of a distributed neural circuitry regulating amygdala synaptic plasticity during fear learning. This circuitry, which involves projections from the midbrain periaqueductal gray (PAG) region, can be linked to prediction error and expectation modulation of fear learning as described by associative and computational learning models. It controls whether, and how much, fear learning occurs by signalling aversive events when they are unexpected. Functional neuroimaging and clinical studies indicate that this prediction circuit is recruited in humans during fear learning and contributes to exposure-based treatments for clinical anxiety. This aversive prediction error circuit may represent a conserved mechanism for regulating fear learning in mammals.
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