Abbreviation

PAG

Species

Mouse

Description of part

The periaqueductal gray (Figs. 52-74) is divided into longitudinal columns as proposed by Andrezik and Beitz (1985) and Carrive et al. (1987) (see also Carrive, 1993). Delineation was assisted by the fact that the dorsolateral lateral column shows a darker acetylcholinesterase reaction than the other columns, whereas the dorsomedial PAG is least reactive (Graybiel and Illing, 1994). In NADPH-diaphorase-stained sections the dorsolateral column also shows more intense reactivity (Carrive and Paxinos, 1994). The NADPH-diaphorase reactive cells and plexus of reactive fibers and terminals in the supraoculomotor cap (SU3C; Figs. 61-66) (Carrive and Paxinos, 1994) are clearly visible in the mouse (unpublished observations).

Part type

gray matter

Nomenclature

Paxinos/Franklin-2001

Endorsement

The approach used by the collator Mihail Bota is not endorsed by the author of the nomenclature.

Collator argument

The hierarchy of this region was constructed using the information found in this atlas.

Reference

periaqueductal gray - Rat - Paxinos/Watson-1998
periaqueductal gray - Human - Mai-1997
periaqueductal gray - Cat - Berman/Jones-1982