Wrist - Main Ligaments and Carpal Tunnel Flashcards
palmar radiocarpal ligament
runs between distal radius and the scaphoid, lunate, and triquetrum on the palmar aspect of the wrist
radial collateral ligament
connects the radial styloid process to the side of the scaphoid
limits ulnar deviation
ulnar collateral ligament
runs from the ulnar styloid process and divides to attach to the triquetrum and to the pisiform
limits radial deviation
dorsal radiocarpal ligament
runs between the distal radius and the scaphoid, lunate and triquetrum on the dorsal aspect of the wrist
distal radioulnar ligament (palmer and dorsal)
wraps around the distal end of the ulna to connect to the radius
flexor retinaculum
or
transverse carpal ligament
attachments:
- medially: pisiform and hook of the hamate
- laterally: scaphoid and trapezium
forms the covering over the carpal tunnel
extensor retinaculum attachments
attachments:
- radius
- pisiform
- triquetrum
palmar aponeurosis
a triangular condensation of deep fascia that covers the palm and is anchored to the skin in distal regions
palmaris aponeurosis attachments
- originates from the flexor retinaculum and the palmaris longus
- inserts at the base of the metacarpophalangeal joint into the transverse metacarpal ligament
palmar aponeurosis functions
- serves as an attachment for muscles, improves grip, and protects deep tendons and vessels
extensor retinaculum function
holds the extensor tendons in place and protects them
extensor retinaculum surgical use
used as a graphs for finger injuries that are not able to be repaired themselves
carpal tunnel
forms anteriorly at the wrist by a deep arch formed by the carpal bones and the flexor retinaculum
carpal tunnel boarders
flexor retinaculum and the carpal arch
laterally: scaphoid tubercle, trapezium tubercle
medially: hook of hamate, pisiform
carpal tunnel contains what muscles
flexor digitorum profundus tendons (4)
flexor pollicis longus tendon
flexor digitorum superficialis tendons (4)
median nerve
