Biceps brachii (left) (Musculus biceps brachii)
Educational content only — not medical advice.
Anatomy
The bulging anterior muscle of the arm with two heads (the long one crossing the shoulder). Famous for its shape, but its strongest action is actually supinating the forearm, alongside elbow flexion.
Origin & insertion
Origin: long head from the supraglenoid tubercle; short head from the coracoid process. Insertion: radial tuberosity and bicipital aponeurosis.
Action
Flexes the elbow and supinates the forearm; assists weakly in shoulder flexion.
Innervation
Musculocutaneous nerve (C5–C6)
Clinical notes
Long-head tendon rupture in older lifters produces the gathered 'Popeye' deformity with surprisingly little strength loss.
Related structures
Educational references
FAQ
What is the role of the Biceps brachii (left)?
The bulging anterior muscle of the arm with two heads (the long one crossing the shoulder). Famous for its shape, but its strongest action is actually supinating the forearm, alongside elbow flexion.
Why is the Biceps brachii (left) clinically important?
Long-head tendon rupture in older lifters produces the gathered 'Popeye' deformity with surprisingly little strength loss.
Source & license
BodyParts3D, © The Database Center for Life Science licensed under CC Attribution 4.0 International (https://creativecommons.org/licenses/by/4.0/). license details