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Flexor carpi ulnaris




Flexor carpi ulnaris - anterior view
Flexor carpi ulnaris - anteromedial view
Flexor carpi ulnaris - posterior view
Flexor carpi ulnaris - medial view

General information

  • This section is strictly limited to anatomy, you might be looking for clinical relevant information which is found under the clinical chapters -- muscles section, click here to go to that page
  • Is a part of the lower arm's anterior superficial group


  • Superficial


  • Medial epicondyle humerus
  • Medial surface of olecranon
  • Posterior aspect of proximal 2/3 of ulna


  • Os pisiforme
  • Os hamatum
  • Base of 5. metacarpal

Main function

  • Wrist
    • Flexion
    • Ulnar deviation

Secondary function

  • Elbow
    • Flexion

Nerve innervation

  • Segmental
    • C7-Th1
  • Peripheral
    • Ulnaris nerve

Arterial supply

  • Ulnar artery


  • Patient position
    • Sitting or supine
  • Place a hand on the palmar aspect of the patient's wrist
  • Ask the patient to flex and ulnar deviate the wrist
  • Feel for the tendon at the ulnar side of the palmar aspect of the wrist
  • The patient should keep the fingers extended to seperate between flexor carpi ulnaris and flexor digitorum superficialis

Strength test

  • Patient position
    • Sitting or supine
  • Ask the patient to hold the lower arm in full supination
  • Give resistance towards the palmar aspect of the hand in direction of extension and radial deviation so that the patient is giving force towards flexion and ulnar deviation