Origin (2 heads):
Long head: Supraglenoid tubercle of glenoid and labrum
Short head: Corocoid process (with coracobrachialis)
Course and relations:
2 heads unite 7 cm proximal fo the elbow joint
Has no tendon sheath (similar to Achillis)
Insertion:
Posterior rough part of radial tuberosity
Biceptial aponeurosis (Lacertus fibrosis) passes medially to blend with the fascia covering common flexor origin
Nerve supply:
Musculocutaneous N
Actions:
Supination
Flexion
