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Definition of Periaqueductal gray
1. Noun. The region surrounding the aqueduct of Sylvius in the midbrain ¹
2. Noun. A region of gray matter with descending pathways which inhibit pain signals in the spinal cord ¹
¹ Source: wiktionary.com
Medical Definition of Periaqueductal gray
1. Central gray matter surrounding the cerebral aqueduct in the mesencephalon. Physiologically it is probably involved in rage reactions, the lordosis reflex, feeding responses, bladder tonus, and pain. (12 Dec 1998)
Lexicographical Neighbors of Periaqueductal Gray
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