Biceps brachii
Biceps · Arms
- Origin
- Long head: supraglenoid tubercle; short head: coracoid process
- Insertion
- Radial tuberosity and bicipital aponeurosis
- Action
- Flexes the elbow and supinates the forearm
The two-headed muscle on the front of the upper arm. It bends the elbow and turns the palm up, which is why supinated curls and chin-ups hit it hardest.