Week 7: Wrist and Hand

Question 1

Actions (2) of ECRL

Answer 1

1. Extension

2. Radial deviation of hand at the wrist

Question 2

Origin of ECRL

Answer 2

Lateral supracondylar ridge of the humerus

Question 3

Insertion of ECRL

Answer 3

Base of 2nd metacarpal

Question 4

Innervation of ECRL

Answer 4

Radian N

c6-c7

Question 5

Actions (2) of ECRB?

Answer 5

1. Extension

2. Radial deviation of hand at the wrist

Question 6

Origin of ECRB?

Answer 6

Lateral epicondyle of the humerus via the common extensor tendon

Question 7

Insertion of ECRB?

Answer 7

base of 3rd metacarpal

Question 8

Innervation of ECRB?

Answer 8

Radial N

C7-C8

Question 9

Actions (2) of ECU?

Answer 9

1. Extension

2. Ulnar deviation of the hand at the wrist

Question 10

Origin of ECU?

Answer 10

Lateral epicondyle of the humerus via the common extensor tendon

Question 11

Insertion of ECU?

Answer 11

base of 5th metacarpal

Question 12

Innervation of ECU?

Answer 12

Radial N.

C7-C8

Question 13

Action of PL?

Answer 13

flexion of hand @ wrist

Question 14

Origin of PL?

Answer 14

Medial epicondyle of the humerus via the common flexor tendon

Question 15

Insertion of PL?

Answer 15

Palmar aponeurosis

Question 16

Innervation of PL?

Answer 16

Median Nerve C7-C8

Question 17

Actions (2) of FCR?

Answer 17

1. Flexion

2. Radially Deviation of the hand at the wrist

Question 18

Origin of FCR?

Answer 18

Medial epicondyle of the humerus via the common flexor tendon

Question 19

Insertion of FCR?

Answer 19

base of the 2nd metacarpal

Question 20

Innervation of FCR?

Answer 20

Median N.

C6-C7

Question 21

Actions (2) of FCU

Answer 21

1. Flexion

2. Ulnar deviation of the hand at the wrist

Question 22

Origin of FCU

Answer 22

Medial epicondyle of the humerus via the common flexor tendon

Question 23

Insertion of FCU

Answer 23

Pisiform Bone

Question 24

Innervation of FCU

Answer 24

Ulnar N. (C7-C8)

Question 25

What part bones of the hand does the distal ulna articulate with?

Answer 25

none, it does not connect directly; there is a fibrocartilage disk that separates them

Question 26

What bones (2) of the hand does the distal radius articulate with?

Answer 26

lunate | scaphoid

Question 27

Which carpal bone does not have 4 articulating surfaces?

Answer 27

pisiform

Question 28

This carpal bone is located by the distal styloid process of the radius and comes out during UD?

Answer 28

Scaphoid

Question 29

This carpal bone is located near the capitate and can be seen with PROM when the hand is flexed?

Answer 29

Lunate

Question 30

This carpal bone is pea shaped

Answer 30

Pisiform

Question 31

This carpal bone is proximal to the 1st metacarpal joint and joint space

Answer 31

Trapezium

Question 32

This carpal bone is the hardest to palpate in the hand?

Answer 32

Trapezoid

Question 33

This carpal bone is in line with the middle finger and is known for its slight depression

Answer 33

Capitate

Question 34

This carpal bone can be very tender and can be found near the palm of the hand

Answer 34

Hamate

Question 35

These 4 carpal bones make up the "proximal" row of the hand

Answer 35

scaphoid lunate triquetrium pisiform

Question 36

These 4 carpal bones make up the "distal" row of the hand

Answer 36

trapezium trapezoid capitate hamate

Question 37

What 3 tendons make up the anatomical snuff box?

Answer 37

extensor pollicis longus extensor pollicis brevis abductor pollicis longus

Question 38

the radiocarpal joint connects what structures?

Answer 38

distal end of radius to proximal surfaces of scaphoid and lunate

Question 39

what 2 actions can occurs at the radiocarpal joint?

Answer 39

wrist flexion/extension | UD/RD

Question 40

at the midcarpal joint, what three carpal bones articulate with the scaphoid?

Answer 40

trapezium trapezoid capitate

Question 41

at the midcarpal joint, which carpal bone articulates with the lunate?

Answer 41

capitate

Question 42

at the midcarpal joint, which carpal bone articulates with the triquetrium?

Answer 42

hamate

Question 43

what 2 actions can occurs at the midcarpal joint?

Answer 43

wrist flexion/extension | UD/RD

Question 44

What structures are connected at the ulnarcarpal articulation?

Answer 44

Distal radius and styloid process of the ulna to the Triquetrium of the hand

Question 45

What structure functions to keep things together and absorb shock within the ulnarcarpal articulation?

Answer 45

Triangular fibrocartilage complex (TFCC)

Question 46

What is the function of the extrinsic ligaments of the wrist?

Answer 46

connect radius, ulna, or metacarpal bones to the carpal bones

Question 47

What is the function of the intrinsic ligaments of the wrist?

Answer 47

connect carpal bones only

Question 48

Name the ligaments (3) that are responsible for keeps the radius and carpal bones connected

Answer 48

Volar radiocarpal ligaments (VRCL) Dorsal radiocarpal ligaments (DRCL) Radial collateral ligaments

Question 49

4 ligaments that make up the VRCL?

Answer 49

radioscaphoid lunate radiolunate radioscaphoid capitate radiotriquetrium

Question 50

Which ligament of the the VCRL is the strongest?

Answer 50

radiotriquetrium

Question 51

Which ligament is most important for motion and stability of the wrist (esp. during rotation?

Answer 51

VCRL

Question 52

Which ligaments provide passive control for the radiocarpal motion?

Answer 52

radial and ulnar collateral ligaments

Question 53

What structure forms the border of the carpal tunnel?

Answer 53

flexor retinaculum

Question 54

What 5 structures make up the carpal tunnel?

Answer 54

``` FDT FDS FCR FPL Median N. ```

Question 55

This provides the origin site for the thumb?

Answer 55

flexor retinaculum

Question 56

This superficial ligament spans the carpal arch and maintains the arch on the palmar side of the wrist?

Answer 56

flexor retinaculum

Question 57

What does the flexor retinaculum attach?

Answer 57

hook of hamate and pisiform to the scaphoid and trapezoid

Question 58

What does the extensor retinaculum attach?

Answer 58

trapezium to the lateral side of radius

Question 59

Radial N, APL, and EPB make up which compartment of the ER?

Answer 59

1st

Question 60

ECU makes up which compartment of the ER?

Answer 60

6th

Question 61

EDM makes up which compartment of the ER?

Answer 61

5th

Question 62

ECRL and ECRB make up which compartment of the ER?

Answer 62

2nd

Question 63

EPL makes up which compartment of the ER?

Answer 63

3rd

Question 64

EI and EDC make up which compartment of the ER?

Answer 64

4th