Biceps brachii

Dr Craig Hacking and Dr Jeremy Jones et al.

The biceps brachii muscle (also known simply as biceps) is a two-headed muscle in the anterior compartment of the arm that flexes at the elbow and supinates the forearm.


  • origin
    • short head: coracoid process of the scapula
    • long head: supraglenoid tubercle of the scapula
  • insertion: radial tuberosity of the proximal radius
  • innervation: musculocutaneous nerve
  • action
    • shoulder joint
      • long head: arm abduction
      • short head: arm adduction and ventral flexion
    • elbow joint
      • supination of the pronated forearm
      • flexion of the supinated forearm

Variant anatomy

  • duplicated long head of biceps tendon: can mimic longitudinal tear 1
Upper limb anatomy
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Article information

rID: 23204
Section: Anatomy
Synonyms or Alternate Spellings:
  • Biceps brachii muscle

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Cases and figures

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    Figure 1: anterior arm anatomy (Gray's illustration)
    Drag here to reorder.
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