periaqueductal grey matter

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An area surrounding the cerebral aqueduct in the pons and thalamus. It contains opiate neuroreceptors and neurons that release endorphins and is thus implicated in the sensation and suppression of pain, and it is also implicated in the control of aggression and in female sexual behaviour. US periaqueductal gray matter. PAG abbrev. [From Greek peri around + Latin aqua water + ductus a leading, from ducere, ductus to lead]

Subjects: Psychology.

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