Maladaptive brain plasticity in pain: amygdala and prefrontal cortex

37th Congress of IUPS (Birmingham, UK) (2013) Proc 37th IUPS, SA187

Research Symposium: Maladaptive brain plasticity in pain: amygdala and prefrontal cortex

V. Neugebauer1

1. Neuroscience & Cell Biology, Univ. of Texas Medical Branch, Galveston, Texas, United States.

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The amygdala is generally considered a brain center for emotions. In pain models, synaptic plasticity develops in a network of lateral (LA), basolateral (BLA) and central (CeA) nuclei. The resulting hyperactivity of CeA neurons drives amygdala-dependent pain behaviors such as emotional-affective responses (vocalizations) and anxiety. Hyperactivity of BLA neurons inhibits processing in the medial prefrontal cortex (mPFC) through “feedforward inhibition”, resulting in cognitive deficits such as impaired decision-making. Counteracting abnormal inhibition of mPFC output neurons mitigates cognitive deficits and also inhibits pain behaviors. At least part of this beneficial effect involves cortical inhibition of amygdala neurons, suggesting that strategies to restore cortical control may have therapeutic value.



Where applicable, experiments conform with Society ethical requirements.

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