Biceps Brachii - Muscle Physiology & Functional Anatomy


Biceps Brachii Muscle




  • Long Head

    • Supra- glenoid tubercle of scapula.

  • Short head

    • Coracoid process of scapula (with coracobrachialis)


  • Posterior border of radial tuberosity (over bursa) & bicipital aponeurosis to deep fascia & subcutaneous ulna

Major Arteries:

  • Brachial artery


Neural Innervation:

  • Musculocutaneous nerve (C5-C7)


Trigger Points:

Trigger points of the Biceps Brachii




Concentric Functions:

  • Elbow flexion

  • Forearm supination

  • Shoulder flexion (weak)


Eccentric Functions:

  • Deceleration of elbow extension & pronation

  • Shoulder extension


Isometric Function:

  • Assists in dynamically stabilizing the gleno-humeral joint and radioulnar joint during functional movements


Related Muscles

  • Brachialis

  • Brachioradialis


  • Triceps Brachii
  • Pronator Teres
  • Pronator Quadratus




More Images of the Biceps Brachii Muscle


Biceps Brachii Muscle & superficial musculature

Biceps Brachii & Deep musculature

Biceps Brachii

More Information about the Biceps Brachii Muscle

The biceps brachii muscle is considered to be triarticulate meaning it produces movement at 3 different joints.  In the case of the biceps brachii, it supinates (laterally rotates) the forearm, flexes the elbow and has a small roll in shoulder flexion when the joint is in certain positions

The biceps brachii is a stronger elbow flexor when the forearm (radioulnar joint) is supinated.


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