Posterior perforated substance

The posterior perforated substance 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.

Posterior perforated substance
Coronal section of brain immediately in front of pons. (Post. perf. substance labeled at lower left.)
Details
Identifiers
Latinsubstantia perforata posterior, substantia perforata interpeduncularis
NeuroNames1580
Anatomical terms of neuroanatomy

The PPS is situated between the two mesencephalic cerebral peduncles,[1]: 476  and posterior/caudal to the two mammillary bodies.[1]: 470  It is perforated by branches of the posterior cerebral arteries en route to the thalamus and basal ganglia.[1]: 473  The PPS forms part of the floor of the third ventricle,[1]: 469  and part of the roof of the interpeduncular cistern.[1]: 440 

See also

Additional images
  • Human brainstem anterior view
    Human brainstem anterior view


References
  1. Sinnatamby, Chummy S. (2011). Last's Anatomy (12th ed.). ISBN 978-0-7295-3752-0.

Public domain This article incorporates text in the public domain from page 800 of the 20th edition of Gray's Anatomy (1918)


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