Interthalamic adhesion

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Brain: Interthalamic adhesion
Dissection showing the ventricles of the brain. (Interthalamic adhesion labeled as Massa Intermedia at center right.)
Coronal section of brain through intermediate mass of third ventricle.
Latin	adhesio interthalamica
Gray's	subject #
Part of	thalamus
Components
Artery
Vein
BrainInfo/UW	hier-284
MeSH	[1]

The medial surface of the thalamus constitutes the upper part of the lateral wall of the third ventricle, and is connected to the corresponding surface of the opposite thalamus by a flattened gray band, the Interthalamic adhesion (massa intermedia, middle commissure, gray commissure).

This mass averages about 1 cm. in its antero-posterior diameter: it sometimes consists of two parts and occasionally is absent. The interthalamic adhesion is found in 70-80% of humansneed citation. When absent in development, no noticable deficit has been observed.

It contains nerve cells and nerve fibers; a few of the latter may cross the middle line, but most of them pass toward the middle line and then curve lateralward on the same side.

External links

• Atlas of anatomy at UMich n1a8p6
• Image at harvard.edu
• Diagram at csuchico.edu (labeled as Massa intermedia)
• Roche Lexicon - illustrated navigator, at Elsevier 13048.000-3

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 As such, some of the information contained herein may be outdated.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.