Muscles in the Posterior Compartment of the Forearm. The muscles in the posterior compartment of the forearm are commonly known as the extensor muscles. The general function of these muscles is to produce extension at the wrist and fingers. They are all innervated by the radial nerve.Consequently, which muscles are innervated by the radial nerve?
The radial nerve (and its deep branch) provides motor innervation to the muscles in the posterior compartment of the arm and forearm, which are mostly extensors.
- Extensor digitorum.
- Extensor digiti minimi.
- Extensor carpi ulnaris.
- Abductor pollicis longus.
- Extensor pollicis brevis.
- Extensor pollicis longus.
- Extensor indicis.
Similarly, what nerve is most prone to injury in the forearm? The radial nerve is most susceptible to injury in the distal one-third of the arm [3,7].
Also know, what does deep radial nerve innervate?
The radial nerve innervates the muscles located in the posterior arm and posterior forearm. In the arm, it innervates the three heads of the triceps brachii, which acts to extend the arm at the elbow. A terminal branch of the radial nerve, the deep branch, innervates the remaining muscles of the posterior forearm.
What nerve affects the tricep?
The radial nerve runs down the underside of your arm and controls movement of the triceps muscle, which is located at the back of the upper arm. The radial nerve is responsible for extending the wrist and fingers.
What happens if the radial nerve is damaged?
Radial Nerve Palsy. This nerve controls movement and sensation in the arm and hand and extension of the elbow, wrist and fingers. Radial nerve palsy is a condition that affects the radial nerve and if damage to this nerve occurs, weakness, numbness and an inability to control the muscles served by this nerve may resultHow do you treat radial nerve damage?
If a radial nerve injury is diagnosed, treatment is usually conservative and include wrist splinting to maintain function, pain management with nonsteroidal anti-inflammatory drugs (NSAIDs), and physical therapy. In extreme cases, a nerve block may be recommended.How do you test for radial nerve damage?
To diagnose a radial nerve injury, a doctor will perform a physical assessment. They will move each joint in the upper arm and ask the person to report any sensation of stretching, tingling, or pain.How do you test radial nerve function?
Then, ask the patient to resist your attempts to squeeze the fingers together. Median motor function >> Ask patient to touch the distal tip of the thumb to the distal tip of the fifth finger and hold it. Then, attempt to pull the two fingers apart and ask patient to resist.What appendage is the radial nerve located?
The radial nerve passes through the humerus spiral groove and the arch formed by the attachment of the humerus and triceps. It also passes through the lateral intermuscular septum and the Arcade of Frohse. This is located below the elbow but above the supinator.What is Saturday night palsy?
THE TERM Saturday night palsy has become synonymous with radial nerve compression in the arm resulting from direct pressure against a firm object. It typically follows deep sleep on the arm, often after alcohol intoxication. The commonly accepted origin of the phrase is the association of Saturday night with carousing.How deep is the radial nerve?
The deep branch of the radial nerve winds to the back of the forearm around the lateral side of the radius between the two planes of fibers of the Supinator, and is prolonged downward between the superficial and deep layers of muscles, to the middle of the forearm.Where can the radial nerve be compressed?
Compression or entrapment can occur at any location within the course of the nerve distribution, but the most frequent location of entrapment occurs in the proximal forearm. This most common location is typically in proximity to the supinator and often will involve the posterior interosseous nerve branch.What is Wartenberg's syndrome?
Wartenberg's syndrome is a specific mononeuropathy, caused by entrapment of the superficial branch of the radial nerve. Symptoms include numbness, tingling, and weakness of the posterior aspect of the thumb. Also called Cheiralgia paresthetica.What are the branches of the radial nerve?
The muscular branches of the radial nerve supply the Triceps brachii, Anconæus, Brachioradialis, and Extensor carpi radialis longus, and are grouped as medial, posterior, and lateral.What causes claw hand?
An ulnar claw, also known as claw hand, or 'Spinster's Claw' is a deformity or an abnormal attitude of the hand that develops due to ulnar nerve damage causing paralysis of the lumbricals.Where is the Subcostal nerve located?
Anatomical terms of neuroanatomy The subcostal nerve (anterior division of the twelfth thoracic nerve) is larger than the others; it runs along the lower border of the twelfth rib, often gives a communicating branch to the first lumbar nerve, and passes under the lateral lumbocostal arch.What is the radial tunnel?
Radial Tunnel Syndrome, also known as Radial Nerve Entrapment, is a condition that occurs when the radial nerve that runs beside the bones and muscle of the forearm and elbow becomes compressed. It can also result in a tingling sensation in the forearm and hand.Why does my pinky finger go numb?
Carpal tunnel syndrome affects the median nerve in the arm, but ulnar nerve entrapment affects the ulnar nerve that runs on the little finger's side of the arm. This most commonly causes numbness in the pinkie and ring fingers. Less common causes of finger numbness can include: Guillain-Barré syndrome.Where does the radial nerve cross the humerus?
The radial nerve arises from the posterior cord of the brachial plexus. The nerve, along with accompanying vessels, crosses medial to lateral obliquely over the posterior surface of the humerus in the spiral groove.What is the anatomical snuff box?
The anatomical snuffbox (also known as the radial fossa), is a triangular depression found on the lateral aspect of the dorsum of the hand. It is located at the level of the carpal bones, and best seen when the thumb is extended.Where is the radial groove?
The radial sulcus ( also known as the musculospiral groove, radial groove, or spiral groove) is a broad but shallow oblique depression for the radial nerve and deep brachial artery. It is located on the center of the lateral border of the humerus bone. 
