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Despite the bulk of the muscle body being visible from the anterior aspect of the forearm, the brachioradialis is a posterior compartment muscle and consequently is innervated by the radial nerve. [5] Of the muscles that receive innervation from the radial nerve, it is one of only four that receive input directly from the radial nerve.
The brachioradialis, flexor of the elbow, is unusual in that it is located in the posterior compartment, but it is actually a muscle of flexor / anterior compartment of the forearm. The anconeus, assisting in extension of the elbow joint, is by some considered part of the posterior compartment of the arm.
The lateral intermuscular septum extends from the lower part of the crest of the greater tubercle of the humerus, along the lateral supracondylar ridge, to the lateral epicondyle; it is blended with the tendon of the deltoid muscle, gives attachment to the triceps brachii behind, and to the brachialis, brachioradialis, and extensor carpi radialis longus muscles in front.
The brachioradialis, flexor of the forearm, is unusual in that it is located in the posterior compartment, but it is actually in the anterior portion of the forearm. The anconeus is considered by some as a part of the posterior compartment of the arm .
The mobile wad (or mobile wad of Henry) is a group of the following three muscles found in the lateral compartment of the forearm: [1]. brachioradialis; extensor carpi radialis brevis
Radial nerve of the right axilla, posterior view. The radial nerve originates as a terminal branch of the posterior cord of the brachial plexus. [1] It goes through the arm, first in the posterior compartment of the arm, and later in the anterior compartment of the arm, and continues in the posterior compartment of the forearm.
lateral head: posterior humerus (above radial sulcus) medial head: posterior humerus - (below radial sulcus) olecranon of ulna: deep artery of arm: radial nerve: extends forearm, adducts shoulder (long head). medial head does not function at shoulder. biceps brachii, brachialis: 2 1 articularis cubiti: Upper Limb, Arm, Posterior compartment ...
The posterior muscular branch, of large size, arises from the nerve in the groove between the triceps brachii and the humerus. It divides into filaments, which supply the medial and lateral heads of the triceps brachii and the anconæus muscles.