What does the posterior interosseous nerve innervate?
The posterior interosseous nerve is a motor nerve and sequentially innervates supinator, extensor carpi radialis brevis, extensor digitorum communis, extensor digiti minimi, extensor carpi ulnaris, abductor pollicis, extensor pollicis brevis, extensor pollicis longus, and extensor indicis.
Is the posterior interosseous nerve motor or sensory?
motor
The posterior interosseous nerve (PIN) is purely motor except for sensory fibers from the muscles it innervates and joint structures. The nerve can be traumatized in proximal fractures of the radius and ulna, but the more common etiology is compression of the nerve as it passes through the supinator muscle.
Where does the posterior interosseous nerve terminate?
Anatomy of Posterior Interosseous Nerve (PIN) It then passes over the abductor pollicis longus muscle origin to travel along the posterior interosseous membrane. At the wrist, it passes through the 4th extensor compartment to terminate on the dorsal wrist capsule.
What forearm muscles does the posterior interosseous nerve supply?
Supply. The posterior interosseous nerve supplies all the muscles of the posterior compartment of the forearm, except anconeus muscle, brachioradialis muscle, and extensor carpi radialis longus muscle.
Why is it called 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.
What is the leash of Henry?
Structures within the radial tunnel that can cause compression of the DBRN include, proximally, fibrous fascial bands coursing superficial to the radial head. the radial recurrent artery and its vena comitans, also known as the leash of Henry.
Does ulnar nerve entrapment require surgery?
If ulnar nerve compression does not improve with nonsurgical treatments, or if the condition causes persistent pain and numbness, your doctor may recommend surgery. NYU Langone doctors specialize in several surgical procedures to relieve pressure on the ulnar nerve at the elbow.
What is honeymooners palsy?
Noun. honeymoon palsy (uncountable) (informal) Saturday night palsy caused by the pressure of one’s partner’s head during sleep.
Is ulnar nerve entrapment serious?
While ulnar nerve entrapment is usually not serious, it can have permanent consequences without prompt treatment, including paralysis and loss of feeling in the affected hand or arm. However, with proper diagnosis and treatment, most people with ulnar nerve entrapment can make a full recovery.