- Discussion:
- transverse carpal ligament, is a heavy band of fibers which runs between
hamate &
pisiform
medially to scaphoid and
trapezium laterally, and forms fibrous sheath which contains
carpal tunnel anteriorly within fibro-osseous tunnel;
- posteriorly, tunnel is bordered by carpal bones, and transports
median nerve & finger flexor tendons from forearm to hand;
- Landmarks:
- distal volar flexion crease crosses proximal end of the scaphoid &
pisiform & identifies proximal
edge of the transverse carpal ligament;
-
pisiform is palpable and just laterally will identify entry of
ulnar nerve and artery into hand;
- all thenar & hypothenar muscles, except the abductor minimi, originate partly from the transverse carpal ligament.
- Kaplan's Line:
- Kaplan oblique line (line drawn from apex of interdigital fold between thumb and index
finger, toward ulnar side of hand, parallel w/ proximal palmar crease, & passing
4-5 mm distal to
pisiform bone;
The transverse carpal ligament. An important component of the digital flexor pulley system.
Transverse carpal ligament reconstruction in surgery for carpal tunnel syndrome: a new technique [see comments.
