Muscles in the Anterior Compartment of the Forearm (Anterior Flexor compartment): Upper limb Anatomy

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Muscles in the Anterior Compartment of the Forearm (Anterior Flexor compartment): Upper limb Anatomy

There are many muscles in the forearm. In the anterior compartment, they are split into three categories: superficial, intermediate, and deep.

In general, muscles in the anterior compartment of the forearm perform flexion at the wrist and fingers, and pronation.

Superficial Compartment
The superficial muscles in the anterior compartment are the flexor carpi ulnaris, palmaris longus, flexor carpi radialis and pronator teres. They all originate from a common tendon, which arises from the medial epicondyle of the humerus.

Intermediate Compartment
The flexor digitorum superficialis is the only muscle of the intermediate compartment. It can sometimes be classed as a superficial muscle, but in most individuals, it lies between the deep and superficial muscle layers.

The muscle is a good anatomical landmark in the forearm – the median nerve and ulnar artery pass between its two heads and then travel posteriorly.

Deep Compartment
There are three muscles in the deep anterior forearm: flexor digitorum profundus, flexor pollicis longus, and pronator quadratus

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