Anterior compartment of the forearm

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Anterior Compartment of the Forearm

The anterior compartment of the forearm is a key anatomical region that contains muscles primarily involved in the flexion and pronation of the wrist and fingers. This compartment is delineated by the flexor retinaculum and the antebrachial fascia, and is divided from the posterior compartment of the forearm by the ulna and radius, the bones of the forearm.

Anatomy[edit | edit source]

The anterior compartment is separated from the posterior compartment by the interosseous membrane and is further divided into superficial and deep layers based on the muscles contained within each.

Superficial Layer[edit | edit source]

The superficial layer includes the following muscles:

Deep Layer[edit | edit source]

The deep layer contains:

Blood Supply and Innervation[edit | edit source]

The anterior compartment is primarily supplied by the ulnar artery and the radial artery. The median nerve and the ulnar nerve are responsible for the innervation of the muscles in this compartment, with the exception of the flexor carpi ulnaris and the medial half of the flexor digitorum profundus, which are innervated by the ulnar nerve.

Clinical Significance[edit | edit source]

Conditions affecting the anterior compartment of the forearm include carpal tunnel syndrome, which is caused by compression of the median nerve, and pronator teres syndrome, a condition that mimics carpal tunnel syndrome but involves entrapment of the median nerve at the forearm. Understanding the anatomy of the anterior compartment is crucial for diagnosing and treating these conditions.

See Also[edit | edit source]

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Contributors: Prab R. Tumpati, MD