Nerve Interosseous Dorsal Forearm

The interosseous nerve of the dorsal forearm (lat. Nervus interosseus dorsi antebrachii) is a branch of the ulnar nerve (C5-C7), innervating the dorsum of the forearm and the back surface of the little finger.

The ulnar nerve starts from the lateral epicondyle of the humerus, bends around it from above and passes into the intermuscular space between the brachial and radial muscles.

The nerve then passes behind the lateral groove of the ulna and emerges from under the muscles of the forearm. At the level of the pisiform bone, it is divided into two branches: the superficial interosseous and the deep interosseous.

The superficial interosseous branch runs along the lateral surface of the radius and innervates the skin of the dorsum of the forearm, as well as the muscles located on the lateral surface of the forearm: brachioradialis, pronator quadratus, flexor digitorum superficialis, flexor pollicis longus and flexor pollicis brevis.

The deep interosseous branch emerges from the intermuscular space in the medial direction and innervates the wrist joint, as well as the skin of the palmar surface of the wrist and the dorsum of the little finger and half of the ring finger.

The interosseous nerve of the dorsal forearm (n. Interosseus Dorsalis) is one of the many nerves that pass through the wrist and forearm. It plays an important role in controlling the movements of the hand and fingers.

The interosseous nerve of the dorsum of the forearm passes through the carpal tunnel, which is located between the bones of the wrist. It starts from the extensor muscles of the palm and passes to the extensor muscles of the fingers. This nerve controls the movements of the fingers and hand, allowing us to perform various activities such as writing, drawing, playing musical instruments and much more.

Problems with the interosseous nerve in the dorsum of the forearm can lead to problems with movement of the fingers and hand. This may be due to injury, illness, or other factors affecting the functioning of the nervous system. If you have problems with finger or hand movement, you may need to see a specialist for diagnosis and treatment.