What is the innervation of the radial nerve?
Table of Contents
What is the innervation of the radial nerve?
Motor Functions 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.
Is the arcade of Frohse the radial tunnel?
The radial tunnel is a musculo-aponeurotic furrow which extends from the lateral epicondyle of humerus to the distal edge of the supinator muscle. The superficial head of the supinator muscle forms a fibrous arch, the arcade of Frohse (AF), which is the most common site of compression of the radial nerve motor branch.
What is the arcade of Frohse?
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.
What are the branches of radial nerve?
The radial nerve and its branches provide innervation the following muscles (See Structure and Function for specific nerve branch innervations and muscle actions)[7]:
- Abductor pollicis longus.
- Anconeus.
- Brachioradialis.
- Extensor carpi radialis brevis.
- Extensor carpi radialis longus.
- Extensor carpi ulnaris.
What is Frohse arcade?
Where is the arcade of Struthers?
19 The arcade of Struthers was defined as a fibrous canal on the medial side of the middle- and lower-third of the arm formed by an expansion of the medial head of the triceps muscle and its aponeurotic expansion, which extends to the intermuscular septum and the internal brachial ligament and covers part of the ulnar …
What does anterior interosseous nerve innervate?
Introduction. Anterior Interosseous Nerve (AIN) is a motor branch from the Median nerve and runs deep in the forearm along with the anterior interosseous artery. It innervates three muscles in the forearm; an isolated palsy of these muscles is known as AIN Syndrome.
How do you remember the branches of the radial nerve?
Mnemonic: Radial nerve supplies BEAST muscles….Motor
- Brachialis, Brachioradialis.
- Extensor muscles of the forearm.
- Anconeus.
- Supinator.
- Triceps.
Does everyone have an arcade of Struthers?
Al-Qattan and Murray[1] in their anatomical studies reported the existence of an arcade of Struthers in 68% of cadaveric specimens (17 of 25 specimens), which is similar to the 70% incidence reported by Kane et al. [14] and the 67% incidence reported by Gonzalez et al.
What is the million dollar nerve?
The recurrent branch of the median nerve is also colloquially called the “Million Dollar Nerve”, because injury to this nerve during carpal tunnel surgery can lead to a million dollar lawsuit. Injury to this nerve can lead to loss of function of the thumb.
Why is it called mobile wad of Henry?
The mobile wad of Henry is a surgical term used to describe the radial muscles of the posterior compartment of the forearm that flex the elbow. The group of muscles is relatively mobile as a unit and can be retracted in surgery.
What is ape hand?
Ape hand is a physical deformity in humans causing an inability to abduct or oppose the thumb thereby causing the thumb little or no abduction and opposition. Abduction of the thumb is the ability to move the perpendicular (90°) away from the plane of the palm.
What is pin nerve?
Anatomy of Posterior Interosseous Nerve (PIN) It is a branch of the radial nerve. It passes between the two heads of the supinator and comes to lie intimately with the proximal radius. It then passes over the abductor pollicis longus muscle origin to travel along the posterior interosseous membrane.
