Carpal Bones Quiz
Questions: 16 · 10 minutes
1. Which sequence lists the proximal carpal row from the thumb side toward the little-finger side?
Pisiform, triquetrum, lunate, scaphoid
Scaphoid, lunate, triquetrum, pisiform
Trapezium, trapezoid, capitate, hamate
Scaphoid, trapezium, lunate, triquetrum
2. On a posteroanterior wrist image, a proximal-row bone sits between the scaphoid on the thumb side and the triquetrum on the little-finger side. Which bone is it?
Lunate
Pisiform
Trapezoid
Capitate
3. How many carpal bones are normally present in one wrist?
Eight
Seven
Nine
Ten
4. Which proximal-row carpal bone is separated from the ulna by the articular disc of the triangular fibrocartilage complex rather than articulating directly with the ulna?
Scaphoid
Capitate
Trapezium
Triquetrum
5. A cyclist develops ulnar-sided hand symptoms from pressure near Guyon's canal. Which pair of carpal landmarks forms important boundaries of this canal?
Scaphoid and trapezium
Trapezoid and triquetrum
Lunate and capitate
Pisiform and hook of hamate
6. A student confuses the trapezium with the trapezoid. Which relationship correctly identifies the trapezium?
It is the central distal bone aligned with the third metacarpal
It is on the little-finger side of the hamate and articulates with the fifth metacarpal
It lies in the proximal row between the lunate and pisiform
It is on the thumb side of the trapezoid and articulates with the first metacarpal
7. At the radiocarpal joint, the distal radius directly articulates with which pair of carpal bones?
Lunate and triquetrum
Scaphoid and trapezium
Scaphoid and lunate
Lunate and capitate
8. During palpation of the palm-side wrist, you identify a small, pea-shaped bone within the tendon of flexor carpi ulnaris. Which bone is it?
Triquetrum
Pisiform
Hamate
Lunate
9. A fracture through the scaphoid waist can threaten blood supply to its proximal fragment. What best explains this concern?
The proximal pole receives blood only through the flexor retinaculum
Much of the scaphoid's blood supply enters distally and travels toward the proximal pole
The scaphoid normally lacks vessels after skeletal maturity
Its blood supply comes primarily through the pisiform
10. On a well-aligned wrist image, which carpal bone lies centrally in the distal row and aligns mainly with the third metacarpal?
Trapezium
Trapezoid
Hamate
Capitate
11. After a fall on an outstretched hand, a person has tenderness in the anatomical snuffbox. Which carpal bone is most strongly associated with this finding?
Triquetrum
Lunate
Scaphoid
Trapezoid
12. A racket-sport athlete develops ulnar-sided palm pain after repeated gripping. Imaging reveals a fracture of a prominent hook-shaped carpal projection. Which bone is injured?
Capitate
Triquetrum
Hamate
Trapezium
13. In cross-section, how do the carpal bones and flexor retinaculum relate to the carpal tunnel?
The carpal bones form the roof, while the retinaculum forms the floor
The carpal bones and retinaculum form only the tunnel's side walls
The carpal arch forms the floor and sides, while the flexor retinaculum forms the roof
The retinaculum completely surrounds the tunnel without bony boundaries
14. Which carpal bone is classically the most commonly dislocated?
Scaphoid
Lunate
Pisiform
Capitate
15. Which carpal bone articulates with the first metacarpal at the thumb's carpometacarpal joint?
Trapezium
Trapezoid
Scaphoid
Capitate
16. Which is the largest carpal bone?
Capitate
Lunate
Hamate
Scaphoid