Anatomical Relations
The interosseous membrane of the forearm joins the shafts of the radius and ulna, forming a syndesmosis. The membrane attaches to the prominent interosseous borders located on the medial and lateral surface of the radius and ulna, respectively.
Distally, the membrane contains an oval aperture, which conducts the anterior interosseous artery from the anterior forearm to the posterior compartment. The posterior interosseous artery passes through a gap between the proximal border of the membrane and the oblique cord of the interosseous membrane.
Anteriorly, the flexor pollicis longus, flexor digitorum profundus, and pronator quadratus muscles attach to the interosseous membrane, while the supinator, abductor pollicis longus, and extensor pollicis brevis, longus, and indicis muscles attach posteriorly.
Related parts of the anatomy
Structure
The interosseous membrane of the forearm is a thin, broad, fibrous membrane that extends between the shafts of the radius and ulna, uniting the two bones in a syndesmosis, or fibrous joint. Its fibers course distomedially.
Function
The interosseous membrane of the forearm provides attachment sites for the deep muscles of the forearm. Additionally, it acts in stabilizing the forearm, preventing migration of the radius from the ulna.
