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Arm Muscles
Origins, Insertions and Action of Arm Muscles
Muscle Name | Origin | Insertion | Action |
---|---|---|---|
Biceps Brachii | Short Head:Coracoid Process of Scapula, Long Head: Supraglenoid Tubercle of Scapula | Tuberosity of Radius and Aponeurosis of Bicep Brachaii | Flex Elbow, Suppinate Elbow, Flex Shoulder |
Brachialis | Distal 1/2 of Anterior Surface of Humerus | Tuberosity and Coronoid Process of Ulna | Flex Elbow |
Brachioradialis | Lateral Supraconsylar Ridge of Humerus | Styloid Process of Raidus | Flex Elbow, Assists in Pronation and Supination of Forearm when movement is resisted |
Triceps Brachii | Long Head: Infraglenoid Tubercle of Scapula, Lateral Head: Posterior Surface of Proximal 1/2 of Humerus, Medial Head: Posterior Surface of Distal 1/2 of Humerus | Olecranon Process of Ulna | All Heads: Extend Elbow, Long Head: Extend Shoulder, Adduct Shoulder |
Supinator | Lateral Epicondyle of Humerus, Radial Collaterial Ligament, Annular Ligament | Lateral Surface Proximal Shaft of Radius | Supinate Forearm |
Pronator Teres | Medial Epicoyle of Humerus, Common Flexor Tendon, Coronoid Process of Ulna | Middle Lateral Surface of Radius | Pronates arm, Assists in Flexion of Elbow |
Pronator Quadratus | Medial, Anterior Surface of Distal Ulna | Lateral, Anterior Surface of Distal Ulna | Pronate Forearm |
Anconeus | Lateral Epicondyle of Humerus | Olecranon Process and Lateral Edge of Ulnar Shaft | Extend Elbow |