Anterior group:
1 Coracobrachialis m.
- O: Apex of cricoid process of the scapula.
- I: Medial side of the midshaft of the humerus.
- F: Flexes the arm
- B.S: Muscular br. of the brachial art.
2 Biceps brachii
I: The long and short heads converge to form a single tendon, which inserts onto the radial tuberosity.
As the tendon enters the forearm, a flat sheet of connective tissue (the bicipital aponeurosis) fans out from the medial side of the tendon to blend with deep fascia covering the anterior compartment of the forearm.
- Short head (medially)
- O: Coracoid process
- Long head stabilize the shoulder joint.
- O: as a tendon from the supraglenoid tubercle of the scapula.
- I: Radial tuberosity
- F: strong flexion & supination of the forearm.
- B.S: Brachial art.
N: Musculocutaneus n. (C5-C6)
3 Brachialis:
- O: Distal half of the anterior aspect of the humerus
- *Lies beneath the biceps brachii
- I: Tuberosity of the ulna.
- N: Musculocutaneus n. (small lateral part by Radial n.)
- F: Flexes the forearm at the elbow joint.
- B.S: Brachial, radial recurrent a.