anterior arm muscles (flexors)

• Biceps Brachii:

  O: Long head: supraglenoid tubercle of scapula

  Short Head: apex of coracoid process of scapula (along with coracobrachialis)

  R: Downwards (muscle bellies merge mid-humerus)

  I: Posterior aspect of radial tuberosity on radius via flat tendon and bicipital aponeurosis

  A: Elbow flexor, powerful supinator (with flexed elbow), Flexor of Glenohumeral joint (GHJ)

  NS: Musculocutaneous nerve (C5,6,7)
• Brachialis:

  O: Distal 2/3 of anterior humeral shaft & medial & lateral intermuscular septa

  R: Downwards

  I: Rough triangular brachialis impression inferior to the tuberosity and coronoid process of the ulna, some additional fibres attach to joint capsule

  A: Flexor of elbow

  NS: Musculocutaneous nerve (C5,6,7)
• Brachioradialis:

  O: Upper 2/3 of the front of the lateral supracondylar ridge and adjacent lateral intermuscular septum

  R: Downwards to form a long narrow tendon mid-forearm

  I: Lateral surface of radius just proximal to the styloid process

  A: Flexor, returns forearm to the mid-position from extremes of pronation and supination

  NS: Radial nerve (C5, 6, 7, 8, T1)