Radial Tunnel Syndrome - Etiology


The theory is that the radial nerve becomes irritated and/or inflamed from friction caused by compression by muscles in the forearm.

Some speculate that Radial Tunnel Syndrome is a type of repetitive strain injury (RSI), but there is no detectable pathophysiology and even the existence of this disorder is questioned.

The term "radial tunnel syndrome" is used for compression of the posterior interosseous nerve, a division of the radial nerve, at the lateral intermuscular septum of arm, while "supinator syndrome" is used for compression at the arcade of Frohse.

The "radial tunnel" is the region from the humeroradial joint past the proximal origin of the supinator muscle. Some scientists believe the radial tunnel extends as far as the distal border of the supinator. The radial nerve is commonly compressed within a 5 cm region near the elbow, but it can be compressed anywhere along the forearm if the syndrome is caused by injury (e.g. a fracture that puts pressure on the radial nerve). The radial nerve provides sensation to the skin of posterior arm, posterior and lateral forearm and wrist, and the joints of the elbow, wrist and hand. The nerve also provides sensory branches that travel to the periosteum of the lateral epicondyle, the anterior radiohumeral joint, and the annular ligament. It provides motor function through innervation to most extensor muscles of the posterior arm and forearm. Therefore, it is extremely important in upper body extremity movement and can cause significant pain to patients presenting with radial tunnel syndrome. Unlike carpal tunnel syndrome, radial tunnel syndrome does not present tingling or numbness, since the posterior interosseous nerve mainly affects motor function.

This problem is often caused by: bone tumors, injury (specifically fractures of the forearm), noncancerous fatty tumors (lipomas), and inflammation of surrounding tissue.

Read more about this topic:  Radial Tunnel Syndrome

Other articles related to "etiology":

Symptomatic Treatment
... its etiology ... for cough Antihistaminics, for allergy Cerebral shunts, to alleviate hydrocephalus When the etiology for the disease is known, then specific treatment may be instituted, but it is generally ... and in fact it may be outright dangerous, because it may mask the presence of an underlying etiology which will then be forgotten or treated with great delay ...
Mental Disorders Diagnosed In Childhood - Elimination Disorders - Etiology
... Enuresis The cause of Enuresis is thought to be unclear and usually is attributed to many factors ... Genetic- there is a genetic component within Enuresis and it tends to run in families ...
Etiology - Medicine
... In medicine, etiology refers to the many factors coming together to cause an illness ... The etiology of scurvy is a good example ...
Gastric Antral Vascular Ectasia - Etiology or Pathogenesis
... from 1953 through 2010, often cited that the etiology or pathogenesis of watermelon disease are unknown ... Gender has some relationship to the etiology ...