Biceps Brachii

Joe Muscolino

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Biceps-Brachii_HR

Anterior view of the right biceps brachii. The coracobrachialis and cut distal end of brachialis are ghosted in. Permission Joseph E. Muscolino.

The biceps brachii is composed of two heads: long head and short head

ATTACHMENTS:

  • The biceps brachii attaches from the supraglenoid tubercle of the scapula (long head) and coracoid process of the scapula (short head) to the radial tuberosity and the bicipital aponeurosis.

 

ACTIONS:

  • Flexes the forearm at the elbow joint
  • Supinates the forearm at the radioulnar joints
  • Flexes the arm at the glenohumeral joint
  • Abducts the arm at the glenohumeral joint (long head)
  • Adducts the arm at the glenohumeral joint (short head)
  • Flexes the arm at the elbow joint (reverse closed-chain action)

 

TRIVIA NOTE:

  • The biceps brachii is one of the three “B”s of elbow joint flexion. The other two are the brachialis and brachioradialis.
  • The distal tendon of the long head of the biceps brachii travels (intra-articularly) through the glenohumeral joint to reach the supraglenoid tubercle of the scapula.