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Periaqueductal gray (PAG; also called the 'central gray') is the gray matter located around the cerebral aqueduct within the midbrain. It plays a role in the descending modulation of pain and in defensive behaviour. The ascending pain and temperature fibers of the spinothalamic tract also send information to the PAG via the spinomesencephalic tract. The spinomesencephalic tract is so-named because the fibers originate in the spine and terminate in the mesencephalon, another name for the midbrain, the part of the brain in which the PAG resides. [WP,unvetted]. [ http://sourceforge.net/p/obo/mouse-anatomy-requests/40/ http://en.wikipedia.org/wiki/Periaqueductal_gray ]

Synonyms: periaqueductal grey substance periaqueductal grey periaqueductal grey matter midbrain periaqueductal grey central (periaqueductal) gray periaqueductal gray of tegmentum periaqueductal gray matter anulus of cerebral aqueduct periaqueductal gray

This is just here as a test because I lose it

Term information


uberon_slim, efo_slim, vertebrate_core

latin term
anulus aqueductus cerebri [ NeuroNames:510 ]

latin term
griseum periventriculare mesencephali [ NeuroNames:510 ]

CGMB [ BIRNLEX:973 NIFSTD:NeuroNames_abbrevSource ]

latin term
griseum centrale mesencephali [ NeuroNames:510 ]

latin term
substantia grisea centralis mesencephali [ NeuroNames:510 ]

latin term
anulus aquaeductus [ NeuroNames:510 ]

depicted by


has broad synonym


griseum centrale

substantia grisea centralis

has related synonym

griseum periventriculare mesencephali

griseum centrale mesencephali

central grey substance of midbrain

substantia grisea centralis mesencephali

central gray

central gray substance of the midbrain

periaqueductal gray, proper

central grey

s. grisea centralis

central gray of the midbrain


anulus aqueductus cerebri

anulus aquaeductus

periaquectuctal grey