Posterior perforated substance

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Brain: Posterior perforated substance
Gray717.png
Coronal section of brain immediately in front of pons. (Post. perf. substance labeled at lower left.)
Latin substantia perforata posterior, substantia perforata interpeduncularis
Gray's p.800
NeuroNames ancil-726

The depressed area between the crura is termed the interpeduncular fossa, and consists of a layer of gray matter, the posterior perforated substance, which is pierced by small apertures for the transmission of blood vessels; its lower part lies on the ventral aspect of the medial portions of the tegmenta, and contains a nucleus named the interpeduncular ganglion; its upper part assists in forming the floor of the third ventricle.

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This article incorporates text from a public domain edition of Gray's Anatomy.