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Flexor digiti minimi brevis



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 hypothenar muscle group


  • Superficial


  • Flexor retinaculum
  • Os hamatum


  • Baes of proximal phalanx of the little finger, ulnar side

Main function

  • Little finger MCP
    • Flexion

Nerve innervation

  • Segmental
    • C8-Th1
  • Peripheral
    • Ulnar nerve

Arterial supply

  • Ulnar artery


  • Patient position
    • Sitting or supine
  • Place your fingers laterally on the hypothenar eminence
  • Ask the patient to perform a flexion movement with the little finger at the MCP-joint
    • Feel for the contraction of the muscle

Strength test

  • Patient position
    • Sitting or supine
  • Ask the patient to hold the little finger in a flexed position of the MCP-joint, while keeping the IP-joint extended
  • Give resistance towards the palmar surface of the proximal phalanx in direction of extension, so that the patient is giving force towards flexion