PMID: 8971127Jan 1, 1996Paper

The amygdala: corticotropin-releasing factor, steroids, and stress

Critical Reviews in Neurobiology
T S Gray, E W Bingaman

Abstract

The possible function of corticotropin-releasing factor (CRF), adrenal steroids, and gonadal steroids in amygdala-mediated responses to anxiogenic or stressful stimuli is reviewed. The amygdala is part of an endogenous CRF circuitry within the brain that mediates neuroendocrine, autonomic, and behavioral changes in response to stress. The amygdala contains CRF-expressing neurons that communicate with widespread regions of the neural axis. High densities of CRF, CRF-binding protein, and CRF receptors are located in the amygdala. Direct injections of CRF into the amygdala produce anxiety-like behaviors. Release of endogenous CRF can be measured in the amygdala during stress. Potent anxiolytic actions are observed when CRF receptor antagonists are administered into the amygdala. CRF-containing neurons of the amygdala can be directly modulated by alterations in circulating glucocorticoids through glucocorticoid receptors, which are expressed in amygdaloid CRF-containing neurons. Gonadal steroid hormone receptors are found in the amygdala. They are not located in CRF immunoreactive neurons, but they are located adjacent to CRF-expressing neurons and in amygdaloid neurons that are likely to participate in central autonomic and neuroe...Continue Reading

Citations

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