Wrist/hand BM

Question 1

Distal radio-ulnar joint

Answer 1

Convex head of ulna on concave radius

Question 2

Osteokinematics of DRUJ

Answer 2

Pronation/supination

Distal radius over distal ulna

Question 3

Pronation/supination of forearm

Answer 3

Simultaneous motion at three joints:

• humero-ulnar
• distal radio-ulnar
• proximal radio-ulnar

Question 4

Pronation/supination arthrokinematics

Answer 4

• HRJ:radial fovea spins on capitulum
• PRUJ: radial head spins within ulnar notch
• DRUJ: radius rolls and glides in same direction on ulna

Question 5

Wrist complex

Answer 5

• distal radio-ulnar joint
• radiocarpal j
• midcarpal j
• Intercarpal j

Question 6

Radiocarpal Joint

Answer 6

Concave radius and ulna/TFCC

Convex proximal carpals (scaphoid, lunate, traquetrum

Question 7

Where is the axial loading concentrated on the carpals

Answer 7

Scaphoid and lunate

Question 8

Midcarpal joint

Answer 8

Joint separating proximal and distal rows

Question 9

ROM for midcarpal joint

Answer 9

Extension > flexion

UD > RD

Question 10

Extrinsic ligaments: palmar

Answer 10

Palmar ulnocarpal

Palmar radiocarpal

Question 11

Palmar ulnocarpal

Answer 11

part of TFCC

Tightens with extension and ulnar deviation

Question 12

Palmar radiocarpal

Answer 12

Tighten with extension

Stronger and thicker than dorsal radiocarpal ligaments

Question 13

Extrinsic ligaments: dorsal

Answer 13

Radial collateral

Ulnar collateral dorsal radiocarpal

Question 14

Radial collateral

Answer 14

• Styloid process to scaphoid and trapezium
• Thicker on palmar side
• Taut in ulnar deviation and extension

Question 15

Ulnar collateral

Answer 15

• styloid process if the ulna

- tightens with radial deviation

Question 16

Dorsal radiocarpal

Answer 16

• radius to scaphoid, lunate & triquetrum

- taut In flexion

Question 17

Intrinsic ligaments: palmar

Answer 17

Palmar intercarpal

Question 18

Palmar intercarpal

Answer 18

• Capitate to scaphoid and triquetrum

- help guide arthrokinematics

Question 19

Intrinsic ligaments: dorsal

Answer 19

Dorsal intercarpal

Question 20

Dorsal intercarpal

Answer 20

Transverse stability

Question 21

TFCC

Answer 21

Triangular Fibrocartilagr complex

Question 22

TFCC components

Answer 22

Capsular ligaments of distal radio-ulnar joint; & ulnar collateral lig

Question 23

Radiocarpal osteokinematics

Answer 23

Flex/ext

Radial/ ulnar deviation

Question 24

Radiocarpal arthrokinematics (not well understand)

Answer 24

Double joint system

Synchronous convex on concave at both radiocarpal and midcarpal

Look at pic

Question 25

Primary wrist extensors

Answer 25

ECRL, ECRB, ECU

Question 26

Secondary wrist extensors

Answer 26

ED, EI, EDM, EPL, EPB, APL

Question 27

Wrist extensor function

Answer 27

Position wrist for finger flexion and gripping activities

Question 28

Primary wrist flexors

Answer 28

FCR, FCU, PL

Question 29

Secondary wrist flexor

Answer 29

Finger flexors (FDS, FDP) and FPL

Question 30

Carpometacarpal joints 2-5 | CMC

Answer 30

2&3: stability 4&5: mobility 2,3,4: one DOF 5: two DOF

Question 31

Metacarpophalangeal joints 2-5 | MCP

Answer 31

Convex metacarpal head | Concave base of proximal phalanx

Question 32

Function of volar plates

Answer 32

Resists hyperextension Protect joint Increase joint congruence

Question 33

MCP ligaments

Answer 33

Collateral: core & accessory | Deep transverse metacarpal lig

Question 34

2-5 MCP DF

Answer 34

Flex/ext | Abd/add

Question 35

MCP arthrokinematics

Answer 35

- Roll and glide in same direction | * *Concave prox. Phalanx on convex metacarpal

Question 36

Intrinsic muscles

Answer 36

Interossei & lumbricales

Question 37

Palmar interossei

Answer 37

Adduct 1,2,4,5 | PAD

Question 38

Dorsal interossei

Answer 38

Abduct 2, 3, 4 | DAB

Question 39

Lumbricales

Answer 39

Flex MCP

Question 40

IP joints: fingers

Answer 40

Convex proximally | Concave distally

Question 41

IP joints DF

Answer 41

Flex/ext

Question 42

Extensor mechanism function

Answer 42

Isolated EDC contraction will only extend MCP joint Interossei & lumbricals must extend PIP & DIP

Question 43

1st CMC

Answer 43

1st metacarpal & trapezium | Saddle joint

Question 44

1st CMC joint DF

Answer 44

Flex/ext | Ab/AD

Question 45

First CMC arthrokinematics flexion/ext

Answer 45

Glide and roll same direction

Question 46

Arches of hand function

Answer 46

Gripping objects

Question 47

Arches

Answer 47

Proximal transverse: distal row of carpals | Distal transverse: through MCP joints

Question 48

5 types of grips

Answer 48

``` Power grips Precision grip Power pinch Pretension pinch Hook grip ```