Nerve Interosseous Palmar Forearm

The palmar interosseous nerve (nervus interosseus volaris) is a small nerve that is located on the lateral surface of the forearm, between the radius and ulna bones. This nerve is responsible for sensation and movement of the muscles of the palm and fingers.

The palmar interosseous nerve is part of a branch of the ulnar nerve that passes through the interosseous membrane (the membrane between the radius and ulna). This membrane contains many small nerves that provide sensation to the skin and muscles of the palm.

When the palmar interosseous nerve of the forearm is damaged, it can lead to loss of sensation and muscle weakness in the palm and fingers. In addition, nerve damage can cause numbness and pain in the palm and fingers, as well as difficulty moving and supporting the fingers.

Various techniques are used to diagnose volar interosseous nerve injury, including electromyography, ultrasound, and computed tomography. Treatment for volar interosseous nerve injuries may include surgery to repair the nerve, medication to reduce pain and numbness, and physical therapy to restore muscle function.

The interosseous palmobrachial branch of the radial nerve is formed from the lateral and medial nerves of the forearm. It then passes through the interosseous membrane along the carpal fossa and continues into the skin of the palm, where it innervates the skin and the median digital nerve. This branch of the nerve supplies the skin of the sternum, deltoid muscle, biceps, tendon, tibia, medial surface of the forearm and palmar surface of the wrist, as well as the base of the thumb.