Flexor carpi radialis

Flexor carpi radialis (FCR) is a muscle found in the first layer of the anterior compartment of the forearm. It does not pass through the carpal tunnel, but rather by itself in a small separate tunnel between the superficial and deep layers of the flexor retinaculum along the scaphoid and trapezium.

Summary

  • origin: medial epicondyle of the humerus, antebrachial fascia
  • insertion: base of the 2nd and 3rd metacarpals, small slip to trapezial tuberosity
  • innervation: median nerve (C6-7)
  • action: flexion and extension of the wrist joint
Upper limb anatomy
Share article

Article information

rID: 23239
Section: Anatomy
Synonyms or Alternate Spellings:
  • Flexor carpi radialis muscle
  • FCR

Support Radiopaedia and see fewer ads

Cases and figures

  • Drag
    Case 1: x-ray
    Drag here to reorder.
  • Drag
    Case 1: ultrasound
    Drag here to reorder.
  • Drag
    Figure 1: carpal tunnel diagram
    Drag here to reorder.
  • Updating… Please wait.
    Loadinganimation

    Alert accept

    Error Unable to process the form. Check for errors and try again.

    Alert accept Thank you for updating your details.