Anterior Compartment

• Coracobrachialis
  • Bony Attachments:
    • 1: Coracoid process of the scapula.
    • 2: medial mid-shaft humerus.
  • Innervation: Musculocutaneous nerve (C5,6).
  • Arterial Supply: Brachial a.
  • Action: Flexes and adducts the arm.
• Biceps Brachii
  • Bony Attachments:
    • 1: Short head : tip of the coracoid process of the scapula;
          Long head: supraglenoid tubercle of the scapula.
    • 2: Tuberosity of the radius.
  • Innervation: Musculocutaneous nerve (C5,6).
  • Arterial Supply: Brachial a.
  • Action: Flexes the forearm, flexes arm (long head), supinates.
• Brachialis
  • Bony Attachments:
    • 1: Anterior surface of the lower one-half of the humerus and the associated intermuscular septum.
    • 2: Coronoid process of the ulna.
  • Innervation: Musculocutaneous nerve (C5,6).
  • Arterial Supply: Brachial a., radial recurrent a.
  • Action: Flexes the forearm.