- Source: Posterior perforated substance
The posterior perforated substance (PPS) is a layer of gray matter which is pierced by small apertures for the transmission of blood vessels. Its inferior part lies on the ventral aspect of the medial portions of the tegmenta and contains the interpeduncular nucleus; its superior part forms part of the floor of the third ventricle.
The PPS is situated between the two cerebral peduncles in the midbrain. and posterior to the two mammillary bodies. It is perforated by the posteromedial central arteries – branches of the posterior cerebral arteries en route to the thalamus and basal ganglia.
See also
Anterior perforated substance
Additional images
References
This article incorporates text in the public domain from page 800 of the 20th edition of Gray's Anatomy (1918)
External links
Atlas image: n2a2p1 at the University of Michigan Health System
"Anatomy diagram: 13048.000-1". Roche Lexicon - illustrated navigator. Elsevier. Archived from the original on 2014-01-01.
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