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Substantia innominata of Meynert

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Brain: Substantia innominata of Meynert
[[Image:|250px|center|]]
[[Image:|250px|center|]]
Latin '
Gray's subject #189 837
Part of
Components
Artery
Vein
BrainInfo/UW hier-256
MeSH A08.186.211.577.820

The substantia innominata (literally "unnamed substance") of Meynert is a stratum consisting partly of gray and partly of white substance, which lies below the anterior part of the thalamus and lentiform nucleus. It is part of the basal forebrain.

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

  • The superior layer is named the ansa lentiformis, and its fibers, derived from the medullary lamina of the lentiform nucleus, pass medially to end in the thalamus and subthalamic region, while others are said to end in the tegmentum and red nucleus.
  • The inferior layer forms the main part of the inferior stalk of the thalamus, and connects this body with the temporal lobe and the insula.

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This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.

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