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

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.

It has superficial and deep layers, which are separate on the radial aspect, containing the tendon of flexor carpi radialis.


Variant anatomy

  • radial aspect of the flexor retinaculum may be pierced by the median nerve
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