Flexor retinaculum

The flexor retinaculum (also known as the transverse carpal ligament) is a rectangular-shaped fibrous band located at the ventral aspect of the wrist.

Gross anatomy

On the radial side, it attaches to the scaphoid tubercle and the ridge of the trapezium. On the ulnar side, it attaches to the pisiform and the hook of the hamate.

The flexor retinaculum encloses and forms the roof of the carpal tunnel. The ulna aspect of the flexor retinaculum forms the floor of Guyon's canal

Attachments
  • proximally: deep fascia of the forearm
  • distally: palmar aponeurosis
Relations

Variant anatomy

  • radial aspect of the flexor retinaculum may be pierced by the median nerve 2
Upper limb anatomy
Share article

Article Information

rID: 33033
Section: Anatomy
Tags: anatomy, wrist
Synonyms or Alternate Spellings:
  • Transverse carpal ligament
  • Flexor retinaculum at the wrist

Support Radiopaedia and see fewer ads

Cases and Figures

  • 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.