Flexor carpi ulnaris muscle

Changed by Andrew Murphy, 2 Jul 2020

Updates to Article Attributes

Body was changed:

Flexor carpi ulnaris (FCU) is a muscle of the first layer of the anterior compartment of the forearm. It is one of the extrinsic muscles of the hand.

Summary

  • origin
    • humeral head: medial epicondyle of the humerus
    • ulnar head: medial border of olecranon and posterior border of ulna
  • insertion: base of 5th metacarpal; hook of hamate, pisiform
  • arterial supply: posterior ulnar recurrent artery and ulnar artery
  • innervationulnar nerve (C8-T1)
  • action: flexion and adduction of the wrist joint
  • pathology:calcific tendinitis which occurs at the insertion into pisiform
  • variability: muscle can be doubled - accessory flexor carpi ulnaris, which can be often accompanied by concomitant variants.Kunc's classification desribes three types and two subtypes based on the level of duplication and its insertion.3
  • -<strong>variability: </strong>muscle can be doubled - accessory flexor carpi ulnaris, which can be often accompanied by concomitant variants.<sup> </sup>Kunc's classification desribes three types and two subtypes based on the level of duplication and its insertion.<sup>3</sup>
  • +<strong>variability: </strong>muscle can be doubled - accessory flexor carpi ulnaris, which can be often accompanied by concomitant variants <sup>3</sup>

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