Wrist and Hand Complex Bony/True Joints

Question 1

radiocarpal joint articulating surfaces

Answer 1

biconcave distal end of the radius and the radioulnar articular disc to biconvex scaphoid, lunate, and triquetrium

Question 2

radiocarpal joint type of joint

Answer 2

synovial biaxial ellipsoid joint

Question 3

radiocarpal joint movements

Answer 3

flexion (volar flexion) and extension (hyperextension)
radial deviation (abduction) and ulnar deviation (adduction)

Question 4

radiocarpal joint flexion-extension plane and axis

Answer 4

sagittal plane (x-axis)

Question 5

radiocarpal joint radial-ulnar deviation plane and axis

Answer 5

frontal plane (z-axis)

Question 6

radiocarpal joint OPP

Answer 6

neutral, slight ulnar deviation

Question 7

radiocarpal joint CPP

Answer 7

full extension, radial deviation

Question 8

midcarpal joint (transverse carpal joint) articulating surfaces

Answer 8

between proximal and distal rows of carpal bones

scaphoid to trapezium and trapezoid
capitate to lunate
capitate and triquetrium to hamate

Question 9

midcarpal joint (transverse carpal joint) type of joint

Answer 9

synovial planar joint

Question 10

midcarpal joint (transverse carpal joint) movements

Answer 10

gliding

Question 11

midcarpal joint (transverse carpal joint) OPP

Answer 11

neutral, slight flexion and ulnar deviation

Question 12

midcarpal joint (transverse carpal joint) CPP

Answer 12

full extension

Question 13

wrist flexion kinematics

Answer 13

radiocarpal joint: 50°
midcarpal joint: 35°

Question 14

wrist extension kinematics

Answer 14

radiocarpal joint: 35°
midcarpal joint: 50°

Question 15

wrist ulnar deviation kinematics

Answer 15

radiocarpal joint: rest of motion
midcarpal joint: 1/3 of motion

Question 16

wrist radial deviation kinematics

Answer 16

radiocarpal joint: rest of motion
midcarpal joint: 1/2 of motion

Question 17

wrist extension arthrokinematics

Answer 17

radiocarpal joint: dorsal roll, palmar slide
midcarpal joint: dorsal roll, palmar slide

Question 18

wrist extension muscles

Answer 18

primary
- extensor carpi radialis longus
- extensor carpi radialis brevis
- extensor carpi ulnaris
secondary
- extensor digitorum (only when digits are extended)
- extensor indicis
- extensor digiti minimi
- extensor pollicis longus

Question 19

wrist flexion arthrokinematics

Answer 19

radiocarpal joint: palmar roll, dorsal slide
midcarpal joint: palmar roll, dorsal

Question 20

wrist flexion muscles

Answer 20

primary
- flexor carpi ulnaris
- flexor carpi radialis
secondary
- palmaris longus (most centrally located)
- flexor digitorum profundus
- flexor digitorum superficialis
- flexor pollicis longus
- abductor pollicis longus

Question 21

wrist ulnar deviation arthrokinematics

Answer 21

radiocarpal joint: ulnar roll, radial slide
midcarpal joint: ulnar roll, radial slide

Question 22

wrist ulnar deviation muscles

Answer 22

extensor carpi ulnaris and flexor carpi ulnaris

Question 23

wrist radial deviation arthrokinematics

Answer 23

radiocarpal joint: radial roll, ulnar slide
midcarpal joint: radial roll, ulnar slide

Question 24

wrist radial deviation muscles

Answer 24

primary
- extensor carpi radialis longus
- extensor carpi radialis brevis
- flexor carpi radialis
secondary
- extensor pollicis brevis
- extensor pollicis longus
- extensor indicis
- flexor pollicis longus