5. Hand (Bones)

Question 1

3 classification of Hand bones

Answer 1

1. Carpus (wrist bone)
2. Metacarpus
3. Phalanges

Question 2

8 Carpus Bones

“So long To Pinky (distal), Here Comes The Thumb (proximal)

Answer 2

1. Scaphoid
2. Lunate
3. Triquetrum
4. Pisiform
5. Trapezium
6. Trapezoid
7. Capitate
8. Hamate

Question 3

Wrist Joint articulation

Answer 3

Scaphoid + Lunate articulate with Radius

Question 4

Mid-Carpal Joint

Answer 4

Proximal Carpal articulate with distal row

Question 5

Inter-carpal Joints

Answer 5

Both row + with each other (+ Mid-Carpal Joint)

Question 6

Scaphoid

• palpable tubercle
• most fractured carpal bone (80% retrograde)

Answer 6

retrograde blood supply - distal to proximal

Question 7

Hamate

• Hook on Palmar surface
• Groove lateral to Hook: tunnel for piso-hamate ligament

Answer 7

Deep branch of Ulnar nerve passes through the canal

Question 8

Piso-Hamate ligament importance

Answer 8

Deep branch of Ulnar nerve

Question 9

Parts of Metacarpal (5)

Answer 9

• Body/shaft
• Base/carpal end
• Head/phalangeal end

Question 10

Characteristics of Metacarpals

Answer 10

• 1st: shorter, thicker, base articulate with Trapezium
• 2-5: articulate with respective distal carpals, base articulates with each other, head articulates with bases of proximal phalanges

Question 11

Parts of Phalanges (14)

Answer 11

2 for thumb, 3 for each finger

• Shaft
• Base
• Head

Question 12

Metacarpo-phalangeal joints (MP)

Answer 12

Base articulate with head of Metacarpals

Question 13

Interphalangeal Joint (Thumb)
Proximal Interphalageal Joint
Distal Interphalangeal Joint

Answer 13

Proximal, Middle, Distal Phalanges