Where does the long head of the biceps brachii originate?

Where does the long head of the biceps brachii originate?

• A. Coracoid Process
• B. Intertubercular Groove
• C. Radial Tuberosity
• D. Supraglenoid Tubercle

Answer: (D)

The long head of the biceps brachii begins at the supraglenoid tubercle of the scapula, a bump just above the glenoid cavity. From there its tendon traverses the shoulder joint capsule, then travels down the humerus in the intertubercular (bicipital) groove to insert on the radial tuberosity. The coracoid process is where the short head (and coracobrachialis) attaches; the intertubercular groove is the path the tendon takes, not an origin; and the radial tuberosity is the distal insertion. So, the supraglenoid tubercle is the origin.

The long head of the biceps brachii begins at the supraglenoid tubercle of the scapula, a bump just above the glenoid cavity. From there its tendon traverses the shoulder joint capsule, then travels down the humerus in the intertubercular (bicipital) groove to insert on the radial tuberosity. The coracoid process is where the short head (and coracobrachialis) attaches; the intertubercular groove is the path the tendon takes, not an origin; and the radial tuberosity is the distal insertion. So, the supraglenoid tubercle is the origin.