Biceps Brachii

The Biceps brachii crosses both the elbow and shoulder joints. Its action on the shoulder joint is very weak flexion. The Biceps brachii works most efficiently in flexing the elbow joint when the forearm is supinated (palm facing up). The bicep curl is the most commonly used exercise to strengthen this muscle.

Origin

• Long head - top of the glenoid fossa
  
  
• Short head - coracoid process

Insertion

• Bicipital tuberosity of the radius
  
  
• Bicipital aponeurosis into the deep fascia of the forearm.

Actions

• Elbow flexion
  
  
• Supination of the forearm

Innervation

• Musculocutaneus nerve

Daily uses

• Picking up a shopping bag

Example strengthening exercises

• Biceps curl using a resistance band

Example stretches

• Bicep stretch

Related injuries

• Biceps tendon inflammation

Related muscles

• Brachioradialis
  
  
• Brachialis