Central gray matter
Substantia grisea centralis
Definition
The central gray matter (also called periaqueductal gray) is a region of gray matter surrounding the mesencephalic aqueduct, rich in opioid receptors, involved in endogenous analgesia, modulation of nociception, and the transmission of visceral information between the forebrain and the brainstem.
References
Evans HE, de Lahunta A. Miller’s anatomy of the dog, 4th edition, Elsevier Saunders, St Louis, 2012.
