Posterior perforated substance

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Brain: Posterior perforated substance
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.