Extensor Carpi Ulnaris

• O (origin):

  • Common extensor origin
  • posterior border of ulna

  A) Extensor Carpi Ulnaris

  
• R (direction):

  • Distally and then tendon runs in a groove between head of ulna and its styloid process

  A) Extensor Carpi Ulnaris

  
• I (insertion):

  • Tubercle on medial side of base of 5th metacarpal

  A) Extensor Carpi Ulnaris

  
• A (actions):

  • Extension and ulnar deviation of wrist

  A) Extensor Carpi Ulnaris

  
• NS (nerve supply):

  • Posterior interosseous branch of radial nerve (C5 - T1)

  A) Extensor Carpi Ulnaris