What is Frohse arcade?

What is Frohse arcade?

The arcade of Frohse (pronounced “\ˈfʁoːzə \”) is also known as the supinator arch. The arcade is formed by a fibrous band between the two heads of the supinator muscle. The deep branch of the radial nerve passes beneath the arcade accompanied by vessels known as the leash of Henry.

How is posterior interosseous nerve syndrome treated?

Treatment of a PIN syndrome consists of either conservative or surgical management. Initially, wrist and/or elbow splints may be used, physical therapy, use of NSAIDs, or a corticosteroid injection in order to reduce local inflammation and swelling around the nerve (Hyde and Gengenbach, 2007).

How does radial nerve entrapment happen?

Pathophysiology. This condition is typically a result of nerve injury secondary to compression, traction, or direct trauma, causing a process of local swelling, edema, or even partial or complete laceration.

Where can the median nerve get entrapped?

The median nerve can be entrapped at four locations around the elbow: distal hu- merus by the ligament of Struthers; proximal elbow by a thickened biceps aponeurosis; el- bow joint between the superficial and deep heads of the pronator teres muscle, which is the most common cause of median nerve compression; and …

What is the difference between radial tunnel syndrome and posterior interosseous nerve syndrome?

Motor dysfunction is not a feature in radial tunnel syndrome. In contrast, posterior interosseous nerve entrapment is always associated with motor weakness. There may be a history of episodic forearm pain followed by progressive weakness of the extensors of the digits as well as extensor carpi radialis brevis.

Is posterior interosseous nerve sensory?

The posterior interosseous nerve provides sensory fibers to the dorsal aspect of the wrist capsule, arising in a separate fascicle sheath from the deep radial aspect in the fourth extensor compartment. The nerve does not provide cutaneous branches.

What do you call the entrapment of the median nerve in between the two pronator heads?

Pronator teres syndrome (also called pronator syndrome) is one of three common median nerve entrapment syndromes; the other two being anterior interosseous nerve syndrome and the far more common carpal tunnel syndrome. Signs and symptoms result from compression of the median nerve in the upper forearm 1.

What is the significance of the arcade of Frohse?

The arcade of Frohse is a site of radial nerve entrapment, and is believed to play a role in causing progressive paralysis of the posterior interosseous nerve, both with and without injury.

Where does the radial nerve pass through the arcade of Frohse?

Normally the deep branch of the radial nerve dives into the posterior forearm through the heads of supinator to emerge as the posterior interosseous nerve. Anatomical variants include the deep radial nerve passing through the Arcade of Frohse to become the posterior interosseous nerve. This variant can increase susceptibility to impingement.

Where does compression occur in posterior interosseous nerve entrapment?

In the case of a posterior interosseous nerve entrapment, the compression occurs within the musculo-tendinous radial tunnel. In 69.4%, the nerve is compressed by the fibrous arcade of Frohse(5) (Level of Evidence: 3B). In a normal situation the nerve dives under the arcade of Frohse (proximal edge of the supinator).

What is the clinical presentation of nerve entrapment syndrome?

Characteristics/Clinical presentation. Symptoms of nerve entrapment syndromes are generally involving pain, sensory and motor changes, sensations of popping, paresthesias, and paresis. Posterior interosseous nerve syndrome is characterized by motor deficits in the distribution of the posterior interosseous nerve.