Brachialis

• Brachialis:

  • Deep to biceps brachii in the anterior arm
  • Thick tendon insertion forms the floor of the cubital fossa

  
• O (origin):

  • Distal 2/3 of anterior humeral shaft
  • medial & lateral intermuscular septa

  A) Brachialis

  
• R (direction):

  • Downwards

  A) Brachialis

  
• I (insertions):

  • Rough triangular brachialis impression inferior to the tuberosity and coronoid process of the ulna
  • Some additional fibres attach to joint capsule

  A) Brachialis

  
• A (actions):

  • Flexor of elbow

  A) Brachialis

  
• NS (nerve supply):

  • Musculocutaneous nerve (C5 - C7)

  A) Brachialis