The brachioradialis, flexor of the anconeus, assisting in extension of the elbow joint, is by some considered part of the posterior compartment of the arm.
22.
With the insertion of the muscle so far from the fulcrum of the elbow, the brachioradialis does not generate as much joint torque as the brachialis or the biceps.
23.
After the injury, the fracture is subject to deforming forces including those of the brachioradialis, pronator quadratus, and thumb extensors, as well as the weight of the hand.
24.
Flexion in the humeroulnar joint is produced by the action of the biceps brachii and brachialis, assisted by the brachioradialis, with a tiny contribution from the muscles arising from the medial epicondyle of the humerus.
25.
The forearm contains many muscles, including the flexors and extensors of the digits, a flexor of the elbow ( brachioradialis ), and pronators and supinators that turn the hand to face down or upwards, respectively.
26.
For example : a patient has sensation of 8 mm in thumb and index pulpa, and has a good brachioradialis, extensor carpi radialis longus and brevis and a pronator teres ( all of M4 ) but no Triceps.
27.
For high median nerve palsy, the brachioradialis or the extensor carpi radialis longus transfer is more appropriate to restore lost thumb flexion and side-to-side transfer of the flexor digitorum profundus of the index finger are generally sufficient.
28.
It ascends between the branches of the radial nerve, lying on the supinator muscle and then between the brachioradialis muscle and the brachialis muscle, supplying these muscles and the elbow-joint, and anastomosing with the terminal part of the profunda brachii.
29.
The biceps brachii, brachialis, and brachioradialis ( which attaches distally ) act to flex the elbow . ( The biceps do not attach to the humerus . ) The triceps brachii and anconeus extend the elbow, and attach to the posterior side of the humerus.
