1how many joints are in the wrist?
bones?
primary muscles?
secondary muscles?
joints: multiple
bones: 10
primary muscles: 6
secondary muscles: 9
2what is the wrists function in occupations
vital structure
3what is the wrists role in hand motion
stability
4what are the motions of the wrist
flexion
extension
radial deviation
ulnar deviation
circumduction (not true circumduction of the wrist, just the 4 motions combined)
5what does the distal radius articulate with
carpal bones: scaphoid and lunate
6what is the key feature of the distal radius
concavity which allow for articulation with the carpal bones
7what are the palpable structures of the distal ulna
ulnar head
ulnar styloid
8which carpal bones are in the proximal row
scaphoid
lunate
triquetrum
pisiform
9which carpal bones are in the distal row
trapezium
trapezoid
capitate
hamate
10what is the neumonic to remember the carpal bones
some lovers try positions that they can't handle
scaphoid
lunate
triquetrum
pisiform
trapezium
trapezoid
capitate
hamate
11what are the motions present at the radiocarpal joint
flexion/extension
radial deviation/
ulnar deviation
12what is the function of the ulnocarpal joint
force absorption
13what is the function of the midcarpal joint
gliding vital for wrist flexion/extension
14what is the function of the interarpal joints
gliding and sliding between carpals
15what are the motions present at the distal radioulnar joint
supination/pronation
16what is the structure of the triangular fibrocartilage complex (TFCC)
cartilaginous disc and ligamentous structure
17what are the functions of the TFCC
stabalize DRUJ
load transmission with weight bearing
18what is the force transmission of the wrist
80% through radiocarpal joint
20% through TFCC and ulnar head
19what is the wrist flexion mechanism for the carpal bones
distal carpal row flexes
proximal row glides dorsal
20what is the wrist extension mechanism for the carpal bones
distal carpal row extends
proximal row glides volar
21what is Dart Thrower's motion
functional position or the hand and wrist - position the wrist is most often in
22what is the function of dart thrower's motion
stabilizes proximal row of carpals
stability for forced grasp