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