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The posterior interosseous nerve (or dorsal interosseous nerve/deep radial nerve) is a nerve in the forearm. It is the continuation of the deep branch of the radial nerve, after this has crossed the supinator muscle. It is considerably diminished in size compared to the deep branch of the radial nerve.
The arcade of Frohse is a site of interosseous posterior nerve entrapment, [2] and is believed to play a role in causing progressive paralysis of the posterior interosseous nerve, both with and without injury. The arcade of Frohse was named after German anatomist, Fritz Frohse (1871–1916). [citation needed]
The increased pressure in the synovial sheath is known to directly or indirectly compress the posterior interosseous nerve of radial nerve. [14] Also, the extra pressure causes synovitis which results in pain in the dorsal part of the wrist.
Unlike carpal tunnel syndrome, radial tunnel syndrome does not present tingling or numbness, since the posterior interosseous nerve mainly affects motor function. [5] This problem is often caused by: bone tumors, injury (specifically fractures of the forearm), noncancerous fatty tumors (lipomas), and inflammation of surrounding tissue. [5]
The abductor pollicis longus muscle is innervated by the posterior interosseous nerve, which is a continuation of the deep branch of the radial nerve after it passes through the supinator muscle. Abductor pollicis longus lies close to the radial nerve. [4] The posterior interosseous nerve is derived from spinal segments C7 & C8. [5]
A branch of the median nerve, the anterior interosseous nerve (AIN) can be affected by either direct penetrating injury, possibly compression in a fashion similar to carpal tunnel syndrome, but most commonly an idiopathic inflammatory process (referred to an Anterior Interosseous Syndrome). As might be expected, the symptoms involve weakness in ...
Anterior interosseous syndrome or Kiloh-Nevin syndrome I is a medical condition in which damage to the anterior interosseous nerve; Deep branch of radial nerve, also known by the Latin term nervus interosseus dorsalis; Posterior interosseous nerve, or dorsal interosseous nerve, is a nerve in the forearm
Middle third of posterior surface of ulna, interosseous membrane: Insertion: Thumb, distal phalanx: Artery: Posterior interosseous artery: Nerve: Posterior interosseous nerve (branching from the radial nerve) Actions: Extension of the thumb (metacarpophalangeal and interphalangeal) Antagonist: Flexor pollicis longus muscle, flexor pollicis ...