Interosseous membrane of forearm

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Interosseous membrane of forearm
The Supinator. (Interosseous membrane labeled at center.)
Latin membrana interossea antebrachii
Nerve Lymph =
Anatomical terminology

The interosseous membrane of the forearm (rarely middle or intermediate radioulnar joint) is a fibrous sheet that connects the radius and the ulna. It is the main part of the radio-ulnar syndesmosis, a fibrous joint between the two bones.

The Role of the Interosseous Membrane:

The interosseus membrane divides the forearm into anterior and posterior compartments, serves as a site of attachment for muscles of the forearm, and transfers forces from the radius, to the ulna, to the humerus.

Movement from supination to pronation

As the forearm moves from Pronation to Supination the Interosseous membrane fibres change from a relaxed state, then become tense in the neutral position and then once again become relaxed as the forearm enters Supination.

See also[edit]