The biceps brachii is a muscle in the anterior compartment of the upper arm. Although the majority of its mass is located anteriorly to the humerus, it has no attachment to the bone itself.
- Attachments: Long head originates from the supraglenoid tubercle of the scapula, and the short head originates from the coracoid process of the scapula. Both heads insert distally into the radial tuberosity and the fascia of the forearm via the bicipital aponeurosis.
- Function: Supination of the forearm, flexion at the elbow and shoulder.
- Innervation: Musculocutaneous nerve.
- Blood supply: Brachial artery.
By TeachMeSeries Ltd (2024)
Fig 1 – The coracobrachialis, biceps brachii and brachialis muscles of the anterior upper arm.