Substantia innominata

Substantia innominata

Coronal MRI slice with cross-hairs indicating location of the substantia innominata
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.


Micrograph showing the substantia innominata (bottom), globus pallidus (top-right), putamen (top-left). LFB-HE stain.

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)

This article is issued from Wikipedia - version of the 6/29/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.