Substantia perforata posterior

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substantia perforata posterior --> posterior perforated substance

The bottom of the interpeduncular fossa at the base of the midbrain, extending from the anterior border of the pons forward to the mamillary bodies, and containing numerous openings for the passage of perforating branches of the posterior cerebral arteries.

Synonym: substantia perforata posterior, locus perforatus posticus, malacarne's space.