mid carpal joint Flashcards
(17 cards)
classification
complex synovial joint
axes of movement
2
articular surfaces
lateral part
scaphoid with trapezium and trapezoid
medial
scaphoid, lunate and triquetral with capitate and hamate
3 features of capsule
fibrous capsule attached to two rows of carpals
strengthened by palmar and dorsal intercarpal ligaments
strengthened by collateral ligaments
ligaments
dorsal intercarpal
palmar intercarpal
radial collateral
ulnar collateral
dorsal intercarpal - where and function
between bones of proximal and distal rows of carpals
reinforces capsule and stabilises joint
palmar intercarpal - where and function
from bones of proximal row predominantly to capitate
reinforces capsule and stabilises joint
radial collateral - where and function
scaphoid -> trapezium (continuation of radial collateral carpal lig)
reinforces capsule and stabilises joint
ulnar collateral - where and function
triquetral -> hamate, continuation of ulnar collateral carpal lig
reinforces capsule and stabilises joint
flexion ROM at RC and MC
RC 50
MC 35
Total 85
extension ROM at RC and MC
RC 35
MC 50
Total 85
ulnar deviation ROM at RC and MC
RC 30
MC 15
Total 45
radial deviation ROM at RC and MC
RC 7
MC 8
Total 15
what limits flexion
dorsal radiocarpal lig
posterior capsule
wrist and finger extensors
aposition of proximal carpal against radius
what limits extension
palmar radiocarpal and ulnocarpal ligaments
anterior capsule
wrist and finger flexors
apposition carpal and radius
what limits ulnar deviation
radial collateral ligament
what limits radial deviation
ulnar collateral ligament
bony opposition of scaphoid against radial styloid
