1. The bicipital aponeurosis originates from the distal insertion of the biceps brachii . 2. A cell from the biceps brachii muscle may contain 100, 000 sarcomeres. 3. Muscles which do this are the biceps brachii , the brachialis and the brachioradialis. 4. Two muscles lie underneath the biceps brachii . 5. The anterior compartment contains three muscles; the biceps brachii , the brachialis and the coracobrachialis. 6. The brachioradialis is synergistic with the brachialis and biceps brachii ; the triceps brachii and anconeus are antagonistic. 7. When pronated, the brachioradialis is more active during elbow flexion since the biceps brachii is in a mechanical disadvantage. 8. Skeletal muscle is arranged in discrete muscles, an example of which is the " biceps brachii ". 9. In training the biceps brachii , it is important to distinguish between the long head and the short head of the biceps. 10. At its apex is a slight elevation, the supraglenoid tuberosity, to which the long head of the biceps brachii is attached.
