Wrist & Hand - Joints & Ligaments Flashcards
Contents of triangular fibrocartilage complex? (7)
dorsal and palmar radioulnar ligaments
triangular fibrocartilage
ulnolunate and ulnotriquetral ligs
meniscus homolog
UCL
Scaphoid, lunate and triquetrium at RCJ are held together by what ligaments?
intercarpal interosseus ligs
RCL origin/insertion
O - radial styloid process
I - scaphoid and trapezium
RCL action
resist ulnar deviation (adduction) of RCJ
UCL origin/insertion
O - ulnar styloid process
I - triquetrium and pisiform
UCL action
resist radial deviation (abduction) of RCJ
UCL has 2 branches. What are they?
dorsal and volar
Palmar radiocarpal ligament origin/insertion
O - distal radius
I - proximal carpals (in two bands)
PRL function
oriented so that hand follows radius in supination of forearm
Dorsal radiocarpal ligament is stronger or weaker than palmar radiocarpal ligs?
DRL weaker than PRL
Function of DRL?
joins both collateral ligs
oriented so that hand follows radius in pronation of forearm
What ligaments holds the heads of the MC’s together?
deep transverse metacarpal ligaments
What ligaments reinforce the MCP joint capsules to the palmar aspect?
palmar ligaments
Each MCP joint has a _______ and _______
radial collateral lig
ulnar collateral lig
RCLs and UCLs of the MCP joints run from…
obliquely from dorsal aspect of MC head to palmar aspect of proximal phalange
MCP joint movements
flex/ext
add/abd
IP joint movements
flex/ext
A broad, flattened tendon
aponeurosis
What articulates at the DRUJ?
ulnar head and ulnar notch of radius
DRUJ movements
pronation
supination
DRUJ joint type
synovial
What is the wrist joint proper?
RCJ
What articulates at RCJ?
radius
TFCC
scaphoid, lunate, triquetrum
RCJ movements
flex/ext
add/abd
