What does the interosseous nerve innervate?
The anterior interosseous nerve (AIN) is a purely motor branch of the median nerve (Fig. 81.8). It innervates the pronator quadratus, the flexor pollicis longus, and the flexor digitorum profundus to the index finger. The nerve branches off from the median nerve about 6 cm below the lateral epicondyle.
What muscles are innervated by the anterior interosseous nerve?
The AIN innervates three muscles in the forearm: flexor pollicis longus (FPL), pronator quadratus (PQ), and the radial half of flexor digitorum profundus (FDP).
What muscles does the radial nerve innervate?
Radial nerve gives out muscular branches to supply the long head, medial head, and lateral head of triceps brachii muscles before and during its course in the radial sulcus. After it emerges out from the radial sulcus, it supplies the brachialis, brachioradialis and extensor carpi radialis longus.
Where does posterior interosseous nerve get entrapped?
The posterior interosseous nerve is susceptible to entrapment as it passes through the supinator muscle immediately below the tip of the lateral epicondyle. Following pain in the elbow and forearm, weakness appears in the extensors of the wrist, fingers, and thumb.
What is anterior and posterior interosseous nerve?
The posterior interosseous artery is the principle artery supplying the middle third of the posterior compartment of the forearm. The posterior interosseous artery is eventually replaced by the anterior interosseous artery that pierces the interosseous membrane at the proximal aspect of the pronator quadratus muscle.
Which nerve innervates the muscles of the posterior compartment of the forearm?
Radial nerve
Superficial posterior forearm muscles
| Definition and function | A group of muscles situated in the superficial posterior compartment of the forearm that produce movements of the forearm, hand and fingers |
|---|---|
| Innervation | Radial nerve |
| Blood supply | Deep brachial artery, radial artery, common interosseous artery |
What is the interosseous membrane made up of?
connective tissue
The interosseous membrane is a thick dense fibrous sheet of connective tissue that spans the space between two bones forming a type of syndesmosis joint. In the upper limb, the interosseous membrane is between the radius and ulna.
What nerve Innervates pronator?
The pronator teres is innervated by the median nerve.
What is the function of the posterior interosseous nerve?
The posterior interosseous nerve, also known as the dorsal interosseous nerve, is the continuation of the deep branch of the radial nerve after it penetrates the supinator muscle. It carries fibers from the C7 and C8 spinal nerves and supplies the majority of the muscles in the posterior compartment of the forearm.
Is the posterior interosseous nerve a major peripheral nerve?
The posterior interosseous nerve (or dorsal interosseous 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….
| Posterior interosseous nerve | |
|---|---|
| Latin | nervus interosseus antebrachii posterior |
| TA98 | A14.2.03.055 |
| TA2 | 6437 |
| FMA | 77559 |