Forearm

The forearm is the structure on the upper limb, between the elbow and the wrist. This term is used in anatomy to distinguish it from the arm (or upper arm).

Related Topics:
Upper limb - Elbow - Wrist - Anatomy

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The forearm contains two long bones, the radius and the ulna. These bones are connected by the interosseous membrane. Ultimately, the forearm is covered by skin, the anterior surface usually being less hairy than the posterior surface.

Related Topics:
Bone - Radius - Ulna

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The forearm contains many muscles, including the flexors and extensors of the digits, a flexor of the elbow (brachioradialis), and pronators and supinators that turn the hand to face upwards or down.

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In cross-section the forearm can be divided into two fascial compartments. The posterior compartment contains the extensors of the hands, which are supplied by the radial nerve.

Related Topics:
Fascial compartment - Radial nerve

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The anterior compartment contains the flexors, and is mainly supplied by the median nerve. The ulnar nerve also runs the length of the forearm.

Related Topics:
Median nerve - Ulnar nerve

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The radial and ulnar arteries, and their branches, supply the blood to the forearm. These usually run on the anterior face of the radius and ulna down the whole forearm.

Related Topics:
Radial - Ulnar arteries

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The main superficial veins of the forearm are the cephalic vein, the median antebrachial and the basilic vein. These veins can be used for cannularisation or venipuncture, although the cubital fossa is a preferred site for getting blood.

Related Topics:
Cephalic vein - Median antebrachial - Basilic vein - Venipuncture - Cubital fossa

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