Peri-

... structures where the facial and vocal components of the pain reaction are integrated are situated in the central part of the brainstem, within the peri-aqueductal grey matter. Does the term "brainstem" refer to a part of the brain? Destruction of this area in animals results in complete ...

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... structures where the facial and vocal components of the pain reaction are integrated are situated in the central part of the brainstem, within the peri-aqueductal grey matter. Destruction of this area in animals results in complete loss of vocal or expressive reactions following a painful stimulus ...

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