Also known as substantia innominata

Substantia innominata

The substantia innominata of Meynert is a stratum in the human brain consisting partly of gray and partly of white substance, which lies below the anterior part of the thalamus and lentiform nucleus...

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The anterior perforated substance is an irregularly quadrilateral area in front of the optic tract

Optic tract

The optic tract is a part of the visual system in the brain.It is a continuation of the optic nerve and runs from the optic chiasm to the lateral geniculate nucleus....

 and behind the olfactory trigone

Olfactory trigone

The olfactory trigone is a small triangular area in front of the anterior perforated substance.Its apex, directed forward, occupies the posterior part of the olfactory sulcus, and is brought into view by throwing back the olfactory tract....

, from which it is separated by the fissure prima; medially and in front, it is continuous with the subcallosal gyrus; it is bounded laterally by the lateral stria of the olfactory tract

Olfactory tract

The olfactory tract is a bundle of axons connecting the mitral and tufted cells of the olfactory bulb to several target regions in the brain, including piriform cortex, amygdala, and entorhinal cortex...

 and is continued into the uncus

Uncus

The anterior extremity of the Parahippocampal gyrus is recurved in the form of a hook, the uncus, which is separated from the apex of the temporal lobe by a slight fissure, the incisura temporalis....

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Its gray substance is confluent above with that of the corpus striatum, and is perforated anteriorly by numerous small bloodvessels that supply such areas as the internal capsule.

External links

- "Interpeduncular fossa

Interpeduncular fossa

The Interpeduncular fossa is a somewhat lozenge-shaped area of the base of the brain, limited in front by the optic chiasma, behind by the antero-superior surface of the pons, antero-laterally by the converging optic tracts, and postero-laterally by the diverging cerebral peduncles.The structures...

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• Photo at umdnj.edu
• NIF Search - Anterior perforated substance via the Neuroscience Information Framework
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  The Neuroscience Information Framework is a repository of global neuroscience web resources, including experimental, clinical, and translational neuroscience databases, knowledge bases, atlases, and genetic/genomic resources.-Description:...