Superficial chest muscles

• Pectoantibrachialis

  O: Manubrium

  I: Flat tendon on the fascia of the forearm

  A: Draws the arm toward the chest
• Pectoralis major

  O: Sternum and median ventral raphe

  I: Humerus

  A: Draws the arm toward the chest
• Pectoralis minor

  O: Sternum

  I: Humerus

  A: Draws the arm toward the chest
• Xiphihumeralis

  O: Xiphoid process of sternum

  I: Humerus covered by a mass of fat in the axilla

  A: Draws the arm toward the chest