In elbow flexion, which end of the biceps tendon is the origin?

In elbow flexion, which end of the biceps tendon is the origin?

• A. Tendon at moving end near elbow
• B. Tendon at non-moving end near shoulder
• C. Insertion at the radius
• D. On the clavicle

Answer: (B)

Understanding origin and insertion helps explain movement. The biceps brachii starts at the shoulder region, with its proximal tendons attaching to the scapula (long head from the supraglenoid tubercle and short head from the coracoid process). The end of the tendon near the shoulder is the origin. The other end of the muscle-tendon unit inserts on the radius at the radial tuberosity, and this is the end that moves as the elbow flexes. So, during elbow flexion, the proximal tendon near the shoulder remains fixed while the distal insertion on the radius moves toward it. The clavicle is not involved as the origin for this muscle.

Understanding origin and insertion helps explain movement. The biceps brachii starts at the shoulder region, with its proximal tendons attaching to the scapula (long head from the supraglenoid tubercle and short head from the coracoid process). The end of the tendon near the shoulder is the origin. The other end of the muscle-tendon unit inserts on the radius at the radial tuberosity, and this is the end that moves as the elbow flexes. So, during elbow flexion, the proximal tendon near the shoulder remains fixed while the distal insertion on the radius moves toward it. The clavicle is not involved as the origin for this muscle.