Wrist & Hand 1

Question 1

Proximal Carpal Row

Answer 1

Scaphoid, Lunate, Triquetrum, Pisiform

• Bones are loosely joined by ligaments

Question 2

Distal Carpal Row

Answer 2

Trapezium, Trapezoid, Capitate Hamate

• Bones are tightly bound by ligaments which provide a rigid and stable base for articulation with the metacarpal bones

Question 3

Radius Bony Landmarks

Answer 3

Radial Styloid Process
Lister’s Tubercle
Ulnar Notch (DRUJ)
Carpal Articular Surface

Question 4

Ulna Bony Landmarks

Answer 4

Ulnar Styloid Process
Ulnar Head (DRUJ)

Question 5

Radiocarpal Joint

Answer 5

Synovial - ellipsoid joint
Between Radius, Scaphoid, & Lunate

Question 6

Radiocarpal Joint (DOF)

Answer 6

2 degrees

Question 7

Radiocarpal Joint (Motions)

Answer 7

Flexion & Extension
Radial Deviation
Ulnar Deviation

Question 8

Midcarpal Joint

Answer 8

Synovial - ellipsoid joint
Between Proximal Carpal Row and Distal Carpal Row

Question 9

Midcarpal Joint (DOF)

Answer 9

2 degrees

Question 10

Midcarpal Joint (Motions)

Answer 10

Flexion & Extension
Radial Deviation
Ulnar Deviation

Question 11

Intercarpal Joints

Answer 11

Synovial - irregular plane joints between adjacent carpal bones

Question 12

Intercarpal Joints (contributes)

Answer 12

contributes to gliding between carpals during radoiocarpal & midcarpal bones

Question 13

What dictates radoiocarpal motion?

Answer 13

The shape of the distal radius

Question 14

The distal end of the radius has a:

Answer 14

25 degree ulnar tilt - ulnar dev > rad dev
10 degree palmar tilt - flexion > extension

Question 15

What consists of a Ray?

Answer 15

Metacarpal + phalanges for each digit

Question 16

What type of joint is the CMC joint at the Thumb I?

Answer 16

Saddle Joint

Question 17

How many degrees of freedom is the CMC joint at the Thumb I?

Answer 17

2 degrees

Question 18

What are the primary and secondary motions of the CMC joint at the Thumb I?

Answer 18

Primary:
- Flexion & Extension
- Abduction & Adduction
Secondary:
- Opposition & Reposition

Question 19

What type of joint is the CMC joint at digits II and III (index and long)?

Answer 19

Complex Saddle Joint
- rigid, stable central pillar
- very little movement

Question 20

What type of joint is the CMC joint at digits IV & V (ring and small)?

Answer 20

Saddle Joint

Question 21

What type of motion does digit IV produce at the CMC joint?

Answer 21

slight flexion & extension

Question 22

How many degrees of freedom does digit IV have at the CMC joint?

Answer 22

1 degree

Question 23

What type of motion does digit V have at the CMC joint?

Answer 23

slight flexion & extension
opposition & reposition

Question 24

How many degrees of freedom does digit V have at the CMC joint?

Answer 24

2 degrees

Question 25

What is the definition of the saddle joint?

Answer 25

articular surfaces of both bones are convex and concave - allows motion in saggital, frontal, and transverse planes

Question 26

What does the saddle shape of the CMC thumb joint allow for?

Answer 26

Extensive joint motions

Question 27

Thumb joints move in planes -- to planes of digits II-V

Answer 27

Perpendicular

Question 28

Opposition:

Answer 28

Combination of thumb CMC abduction, flexion, and medial rotation

Question 29

Reposition:

Answer 29

Combination of thumb CMC adduction, extension, and lateral rotation

Question 30

What is the correct order of joints from proximal to distal? - PIP, CMC, MCP, DIP

Answer 30

CMC, MCP, PIP, DIP

Question 31

What would happen if thumb opposition was not possible?

Answer 31

Thumb would flex to touch the sides of four fingers

Question 32

Thumb opposition allows for...

Answer 32

improvement of stable grasp and dexterity

Question 33

Wrist Stability is provided by...

Answer 33

1. Bony configurations of joints 2. Ligament (static) stabilizers 3. Dynamic Stabilizers - Wrist Muscles - Extrinsic Finger Muscles

Question 34

Wrist Extensor Muscles 1. 2. 3.

Answer 34

1. Extensor Carpi Radialis Longus 2. Extensor Carpi Radialis Brevis 3. Extensor Carpi Ulnaris

Question 35

Wrist Flexor Muscles 1. 2. 3.

Answer 35

1. Flexor Carpi Radialis 2. Flexor Carpi Ulnaris 3. Palmaris Longus

Question 36

Thumb MCP joint is what kind of joint?

Answer 36

Hinge Joint 1 degree

Question 37

Digits II-V MCP joints are what kind of joints?

Answer 37

Condyloid Joints 2 degrees

Question 38

All IP joints are what kind of joints?

Answer 38

Hinge Joints 1 degree

Question 39

Arches of the hand describe what?

Answer 39

Natural concavity of palmar surface of hand

Question 40

Longitudinal Arch is along what ray?

Answer 40

3rd Ray

Question 41

What is the keystone of the Longitudinal Ray?

Answer 41

2nd and 3rd MCP Joints

Question 42

Where is the Proximal Arch located?

Answer 42

Level of CMC joints - fixed arch

Question 43

What is the keystone of the Proximal Arch?

Answer 43

Capitate

Question 44

Where is the keystone of the Distal Transverse Arch?

Answer 44

2nd and 3rd MCP joints

Question 45

Where is the Distal Transverse Arch located?

Answer 45

Level of MCP joints - mobile arch

Question 46

Arch framework is supported by what?

Answer 46

Intrinsic Hand Muscles