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The musculocutaneous nerve is a mixed branch of the lateral cord of the brachial plexus derived from cervical spinal nerves C5-C7. It arises opposite the lower border of the pectoralis major. It provides motor innervation to the muscles of the anterior compartment of the arm: the coracobrachialis, biceps brachii, and brachialis. [ 1 ]
The pronator teres is a muscle (located mainly in the forearm) that, along with the Pronator quadratus muscle pronator quadratus, serves to pronate the forearm (turning it so that the palm faces posteriorly when from the anatomical position). It has two origins, at the medial humeral supracondylar ridge and the medial side of the coronoid ...
Erb's palsy is a paralysis of the arm caused by injury to the upper group of the arm's main nerves, specifically the severing of the upper trunk C5–C6 nerves. These form part of the brachial plexus, comprising the ventral rami of spinal nerves C5–C8 and thoracic nerve T1. [1][2][3] These injuries arise most commonly, but not exclusively ...
Triangular fibrocartilage disc. The triangular fibrocartilage disc (TFC) is an articular discus that lies on the pole of the distal ulna. It has a triangular shape and a biconcave body; the periphery is thicker than its center. The central portion of the TFC is thin and consists of chondroid fibrocartilage; this type of tissue is often seen in ...
38485. Anatomical terms of muscle. [edit on Wikidata] The brachioradialis is a muscle of the forearm that flexes the forearm at the elbow. [1][2] It is also capable of both pronation and supination, depending on the position of the forearm. [2] It is attached to the distal styloid process of the radius by way of the brachioradialis tendon, and ...
The patient needs to be in a seated position with the elbow flexed to 90°, forearm pronated (palm facing the ground), and the arm stabilized against the thorax. [2] [3] [4] The examiner places the stabilizing hand on the proximal portion of the humerus near the bicipital groove, and the resistance hand on the distal forearm and wrist. [1] [2]
The flexor carpi radialis is one of four muscles in the superficial layer of the anterior compartment of the forearm. This muscle originates from the medial epicondyle of the humerus as part of the common flexor tendon. It runs just laterally of flexor digitorum superficialis and inserts on the anterior aspect of the base of the second ...
The anconeus muscle (or anconaeus / anconæus) is a small muscle on the posterior aspect of the elbow joint. Some consider anconeus to be a continuation of the triceps brachii muscle. [1][2][3] Some sources consider it to be part of the posterior compartment of the arm, [4] while others consider it part of the posterior compartment of the forearm.