A Proposal for a New Classification of the Supernumerary Heads of the Biceps Brachii Muscle

Figure 2

Type II of the biceps brachii. (a) Type IIa of biceps brachii. Right arm: CBM coracobrachialis muscle; shBB short head of the biceps brachii; lhBB long head of the biceps; thBB third head of the biceps brachii. (b) Type IIb of biceps brachii. Right arm: shBB short head of the biceps brachii; lhBB long head of the biceps brachii; thBB third head of the biceps brachii. (c) Type IIc of the biceps brachii. Right arm: shBB short head of the biceps brachii; lhBB long head of the biceps brachii; thBB third head of the biceps brachii; PM tendon of the pectoralis major muscle d Type IId of the biceps brachii. Left arm: CP coracoid process; GT greater tubercle; lhBB long head of the biceps brachii; shBB short head of the biceps brachii; thBB third head of the biceps brachii.

(a)

(b)

(c)

(d)