Substantia innominata

Substantia innominata
Coronal MRI slice with cross-hairs indicating location of the substantia innominata
Identifiers
MeSH	A08.186.211.577.820
NeuroNames	hier-256
NeuroLex ID	Substantia innominata
TA	A14.1.09.426
FMA	61885
Anatomical terms of neuroanatomy []

The substantia innominata (literally "unnamed substance") 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. The gross anatomical structure is called the anterior perforated substance because, to the naked eye, it appears to be perforated by many holes (which are actually blood vessels). It is part of the basal forebrain and includes the nucleus basalis.

It consists of three layers, superior, middle, and inferior.

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