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substantia perforata anterior --> anterior perforated substance

A region at the base of the brain through which numerous small branches of the anterior and middle cerebral arteries (lenticulostriate arteries) enter the depth of the cerebral hemisphere; it is bordered medially by the optic chasm and anterior half of the optic tract, rostrally and laterally by the lateral olfactory stria; its anteromedial part corresponds to the olfactory tubercle.

Synonym: substantia perforata anterior, locus perforatus anticus, olfactory area.