Biceps brachii muscle

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.

Summary

• 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 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
• bifid/bifurcated insertion: anatomic variant that arises from persistent division between the short head and long head of the distal biceps brachii tendon
• accessory head of long head of biceps tendon

Siehe auch:

• Musculus biceps brachii, Caput longum

und weiter:

• Processus coracoideus
• Oberarmmuskulatur
• Ellenbogengelenksmuskulatur
• Ursprung lange Bizepssehne