Week 4

Question 1

Carpal arch constitutes the following bones

Answer 1

1. Pisiform
2. Triquetrum
3. Hamate
4. Capitate
5. Trapezoid
6. Trapezium
7. Tubercle

Question 2

What are the carpal bones, starting from the distal pinky end to the thumb?

Answer 2

1. Hamate
2. Hook of Hamate
3. Triquetrum
4. Pisiform
5. Capitate
6. Lunate
7. Trapezoid
8. Scaphoid
9. Tubercle of Scaphoid
10. Trapezium
11. Tubercle of Trapezium

Question 3

the wrist joint also known as radiocarpal joint is classified as

Answer 3

a synovial and condyloid joint

Question 4

articulating surfaces of the wrist, radiocarpal joint

Answer 4

distal end of radius and articular disc, with scaphoid, lunate and triquetrum

Question 5

ligaments of the wrist radiocarpal joint

Answer 5

• Radial collateral ligament; runs from the radius to the scaphoid and trapezium
• Ulnar collateral ligament; runs from the ulna to the triquetrum and pisiform
• Palmar and dorsal radiocarpal ligament

Question 6

movements of the wrist radiocarpal joint

Answer 6

flexion and extension
abduction and adduction
circumduction

Question 7

innervation of the wrist, radiocarpal joint

Answer 7

median, ulnar, and radial nerve

Question 8

classification of midcarpal joint

Answer 8

synovial and condyloid

Question 9

articulating surfaces of midcarpal joint

Answer 9

proximal row of carpal bones with distal row of carpal bones

Question 10

ligaments of midcarpal joint

Answer 10

palmar, dorsal and interosseous ligaments

Question 11

movements of midcarpal joint

Answer 11

flexion, extension, abduction, adduction; facilitate radiocarpal joint

Question 12

classification of carpometacarpal joints

Answer 12

Synovial and saddle

Question 13

articulating surfaces of carpometacarpal joints

Answer 13

trapezium and base of 1st metacarpal

Question 14

ligaments of carpometacarpal joints

Answer 14

joint capsule

Question 15

movements of carpometacarpal joints

Answer 15

flexion and extension
abduction and adduction
medial and lateral rotation
circumduction
combination of flexion, medial rotation and adduction= opposition

Question 16

classification of metacarpophalangeal joints

Answer 16

synovial, condyloid (2-5)
synovial, hinge (1)

Question 17

articulating surfaces of metacarpophalangeal joints

Answer 17

heads of metacarpals with bases of proximal phalanges

Question 18

ligaments of metacarpophalangeal joints

Answer 18

collateral ligaments
palmar ligaments
deep transverse metacarpal (2-5)

Question 19

movements of the metacarpophalangeal joints

Answer 19

MCP 1: flexion and extension
MCP 2-5: flexion and extension
abduction and adduction

Question 20

interphangeal joints can be

Answer 20

proximal or distal

Question 21

Proximla interphangeal joints

Answer 21

classification: synovial, hinge
articulating surfaces: heads of proximal phalanges 2-5 with bases of middle phalanges 2-5
ligaments: collateral ligaments (medial and lateral) palmar ligaments
movements: flexion and extension

Question 22

distal interphangeal joints

Answer 22

classification: synovial, hinge
articulating surfaces: heads of middle phalanges 2-5 with bases of distal phalanges 2-5
ligaments: collateral ligaments (medial and lateral) palmar ligaments
movements: flexion and extension

Question 23

thumb

Answer 23

classification: synovial hinge
articulating surfaces: head of proximal phalanx of thumb, base of distal phalanx of thumb
ligaments: collateral ligaments (medial and later) palmar ligaments
movements: flexion and extension

Question 24

intrinsic muscles of the hand

Answer 24

-Thenar muscles: abductor pollicis brevis, flexor pollicis brevis, opponens pollicis
-Hypothenar muscles: abductor digiti minimi, flexor digiti minimi, opponents digiti minimi
- dorsal interossei
-palmar interossei
- lumbricals
- adductor pollicis
- palmaris brevis

Question 25

palmaris brevis

Answer 25

origin: palmar aponeurosis, flexor retinaculum

insertion: skin

innervtaion: ulnar nerve

action: improves grip

Question 26

Innervation- median nerve

Answer 26

MEat LOAF
Lumbricals 1 and 2
Opponens pollicis
Abductor pollicis brevis
Flexor pollicis brevis

Question 27

thenar muscles; opponens pollicis

Answer 27

Innervation: median nerve
action: medial rotation of the thumb

Question 28

thenar muscles; abductor pollicis brevis

Answer 28

innervtaion: median nerve
action: abducts thumb at metacarpophalangeal joint

Question 29

thenar muscles; flexor pollicis brevis

Answer 29

innervation: median
action: flexes thumb at metacarpophalangeal joint

Question 30

hypothenar muscles; opponens digit minimi

Answer 30

innervation: ulnar nerve

action: lateral rotation of the little finger

Question 31

hypothenar muscles; abductor digiti minimi

Answer 31

innervation: ulnar nerve

action: abducts little finger at metacarpophalangeal joint

Question 32

hypothenar muscles; flexor digiti minimi brevis

Answer 32

innervation: ulnar nerve

action: flexes little finger, at metacarpophalangeal joint

Question 33

Adductor pollicis

Answer 33

innervation: ulnar nerve

action: adducts thumb

Question 34

lumbrical (1-4)

Answer 34

innervation: medial two - ulnar nerve
lateral two - median

action: flex MCP joint while extending interphalangeal joints

Question 35

palmar interossei

Answer 35

innervation: ulnar nerve

action: adduct thumb, index, ring and little fingers

Question 36

dorsal interossei

Answer 36

innervation: ulnar nerve

action: abduct index, middle, and ring fingers

Question 37

palmar aponeurosis

Answer 37

-facilitates grip
-protection

Question 38

flexor retinaculum

Answer 38

-forms roof of carpal tunnel
-limits anterior movement of long flexor tendons

Question 39

fibrous digital sheaths

Answer 39

-limits anterior and side to side movement of long flexor tendons of digits
-lined by synovial sheaths (synovial membranes), which facilitate movement

Question 40

extensor retinaculum

Answer 40

-holds long extensor tendons in place
-has extensions to bone which forms 6 separate tunnels for the passage of tendons
-tendons surrounded by synovial sheaths