SYSTEM

Hand Bones in the Skeletal System Quiz

Hand bones in the skeletal system quiz: structure, classification, topography, and anatomical relationships of the carpal bones, metacarpals, and phalanges.

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1. How many bones comprise the wrist (carpus) in an adult?

6

The wrist consists of 8 short cancellous bones, arranged in two rows of 4 bones each.
8

The wrist consists of 8 short cancellous bones, arranged in two rows of 4 bones each.
10

The wrist consists of 8 short cancellous bones, arranged in two rows of 4 bones each.
12

The wrist consists of 8 short cancellous bones, arranged in two rows of 4 bones each.
I find it difficult to answer

The wrist consists of 8 short cancellous bones, arranged in two rows of 4 bones each.

2. Which carpal bone is the largest and occupies a central position in the distal row?

Trapezium

Os capitatum (capitate bone) is the largest carpal bone; it is located in the center of the distal row and articulates with os lunatum and os scaphoideum.
Os trapezoideum

Os capitatum (capitate bone) is the largest carpal bone; it is located in the center of the distal row and articulates with os lunatum and os scaphoideum.
Os capitatum

Os capitatum (capitate bone) is the largest carpal bone; it is located in the center of the distal row and articulates with os lunatum and os scaphoideum.
Os hamatum

Os capitatum (capitate bone) is the largest carpal bone; it is located in the center of the distal row and articulates with os lunatum and os scaphoideum.
I find it difficult to answer

Os capitatum (capitate bone) is the largest carpal bone; it is located in the center of the distal row and articulates with os lunatum and os scaphoideum.

3. The proximal row of carpal bones comprises the following bones (in the radioulnar direction):

Scaphoid, lunate, triquetrum, pisiform

The proximal row of the wrist (from the radial to the ulnar side): scaphoid, lunate, triquetral, and pisiform bones.
Trapezium, trapezoid, capitate, hamate

The proximal row of the wrist (from the radial to the ulnar side): scaphoid, lunate, triquetral, and pisiform bones.
Scaphoid, trapezium, capitate, pisiform

The proximal row of the wrist (from the radial to the ulnar side): scaphoid, lunate, triquetral, and pisiform bones.
Lunate, triquetrum, hamate, trapezoid

The proximal row of the wrist (from the radial to the ulnar side): scaphoid, lunate, triquetral, and pisiform bones.
I find it difficult to answer

The proximal row of the wrist (from the radial to the ulnar side): scaphoid, lunate, triquetral, and pisiform bones.

4. Which carpal bone is sesamoid and lies within the tendon of m. flexor carpi ulnaris?

Os triquetrum

Os pisiforme (pisiform bone) is the only sesamoid bone of the wrist; it is located in the flexor carpi ulnaris tendon and articulates only with the triquetral bone.
Os pisiforme

Os pisiforme (pisiform bone) is the only sesamoid bone of the wrist; it is located in the flexor carpi ulnaris tendon and articulates only with the triquetral bone.
Os hamatum

Os pisiforme (pisiform bone) is the only sesamoid bone of the wrist; it is located in the flexor carpi ulnaris tendon and articulates only with the triquetral bone.
Os lunatum

Os pisiforme (pisiform bone) is the only sesamoid bone of the wrist; it is located in the flexor carpi ulnaris tendon and articulates only with the triquetral bone.
I find it difficult to answer

Os pisiforme (pisiform bone) is the only sesamoid bone of the wrist; it is located in the flexor carpi ulnaris tendon and articulates only with the triquetral bone.

5. Which bone forms the hook (hamulus), which is a medial landmark of the carpal tunnel?

Trapezium

Os hamatum (uncinate bone) comprises a characteristic bony process—the hamulus ossis hamati—which forms the medial wall of the carpal tunnel.
Os capitatum

Os hamatum (uncinate bone) comprises a characteristic bony process—the hamulus ossis hamati—which forms the medial wall of the carpal tunnel.
Os trapezoideum

Os hamatum (uncinate bone) comprises a characteristic bony process—the hamulus ossis hamati—which forms the medial wall of the carpal tunnel.
Os hamatum

Os hamatum (uncinate bone) comprises a characteristic bony process—the hamulus ossis hamati—which forms the medial wall of the carpal tunnel.
I find it difficult to answer

Os hamatum (uncinate bone) comprises a characteristic bony process—the hamulus ossis hamati—which forms the medial wall of the carpal tunnel.

6. Tuberculum ossis scaphoidei is a landmark of which border of the carpal tunnel?

Medial

The tubercle of the scaphoid bone (tuberculum ossis scaphoidei) and the crest of the trapezium form the lateral wall (lateral border) of the carpal tunnel.
Lateral

The tubercle of the scaphoid bone (tuberculum ossis scaphoidei) and the crest of the trapezium form the lateral wall (lateral border) of the carpal tunnel.
Proximal

The tubercle of the scaphoid bone (tuberculum ossis scaphoidei) and the crest of the trapezium form the lateral wall (lateral border) of the carpal tunnel.
Distal

The tubercle of the scaphoid bone (tuberculum ossis scaphoidei) and the crest of the trapezium form the lateral wall (lateral border) of the carpal tunnel.
I find it difficult to answer

The tubercle of the scaphoid bone (tuberculum ossis scaphoidei) and the crest of the trapezium form the lateral wall (lateral border) of the carpal tunnel.

7. How many metacarpal bones (ossa metacarpi) are present in the skeleton of the hand?

4

The metacarpus is formed by 5 tubular bones—ossa metacarpi I–V—each of which comprises a base, body, and head.
5

The metacarpus is formed by 5 tubular bones—ossa metacarpi I–V—each of which comprises a base, body, and head.
6

The metacarpus is formed by 5 tubular bones—ossa metacarpi I–V—each of which comprises a base, body, and head.
7

The metacarpus is formed by 5 tubular bones—ossa metacarpi I–V—each of which comprises a base, body, and head.
I find it difficult to answer

The metacarpus is formed by 5 tubular bones—ossa metacarpi I–V—each of which comprises a base, body, and head.

8. Which part of a metacarpal bone articulates with the carpal bones?

Head

The base (basis) of a metacarpal bone articulates with the bones of the distal carpal row, forming the carpometacarpal joints (articulationes carpometacarpales).
Shaft

The base (basis) of a metacarpal bone articulates with the bones of the distal carpal row, forming the carpometacarpal joints (articulationes carpometacarpales).
Base

The base (basis) of a metacarpal bone articulates with the bones of the distal carpal row, forming the carpometacarpal joints (articulationes carpometacarpales).
Tuberosity

The base (basis) of a metacarpal bone articulates with the bones of the distal carpal row, forming the carpometacarpal joints (articulationes carpometacarpales).
I find it difficult to answer

The base (basis) of a metacarpal bone articulates with the bones of the distal carpal row, forming the carpometacarpal joints (articulationes carpometacarpales).

9. Which feature of the first metacarpal distinguishes it from the other metacarpal bones?

It is longer than all the others

The first metacarpal is shorter and more robust than the others; its proximal articular end comprises a saddle-shaped articular surface that enables extensive mobility of the thumb.
It comprises two saddle-shaped articular ends

The first metacarpal is shorter and more robust than the others; its proximal articular end comprises a saddle-shaped articular surface that enables extensive mobility of the thumb.
Its body is triangular in cross-section

The first metacarpal is shorter and more robust than the others; its proximal articular end comprises a saddle-shaped articular surface that enables extensive mobility of the thumb.
It does not comprise a base

The first metacarpal is shorter and more robust than the others; its proximal articular end comprises a saddle-shaped articular surface that enables extensive mobility of the thumb.
I find it difficult to answer

The first metacarpal is shorter and more robust than the others; its proximal articular end comprises a saddle-shaped articular surface that enables extensive mobility of the thumb.

10. How many phalanges does the thumb (pollex) have?

One

The thumb comprises only two phalanges—the proximal phalanx (phalanx proximalis) and distal phalanx (phalanx distalis)—unlike the other digits, which have three.
Two

The thumb comprises only two phalanges—the proximal phalanx (phalanx proximalis) and distal phalanx (phalanx distalis)—unlike the other digits, which have three.
Three

The thumb comprises only two phalanges—the proximal phalanx (phalanx proximalis) and distal phalanx (phalanx distalis)—unlike the other digits, which have three.
Four

The thumb comprises only two phalanges—the proximal phalanx (phalanx proximalis) and distal phalanx (phalanx distalis)—unlike the other digits, which have three.
I find it difficult to answer

The thumb comprises only two phalanges—the proximal phalanx (phalanx proximalis) and distal phalanx (phalanx distalis)—unlike the other digits, which have three.

11. What is the distal phalanx of a digit called in standard anatomical nomenclature?

Middle phalanx

According to Terminologia Anatomica, the distal phalanx is designated phalanx distalis. The term phalanx ungularis is an obsolete synonym.
Distal phalanx

According to Terminologia Anatomica, the distal phalanx is designated phalanx distalis. The term phalanx ungularis is an obsolete synonym.
Ungual phalanx

According to Terminologia Anatomica, the distal phalanx is designated phalanx distalis. The term phalanx ungularis is an obsolete synonym.
Terminal phalanx

According to Terminologia Anatomica, the distal phalanx is designated phalanx distalis. The term phalanx ungularis is an obsolete synonym.
I find it difficult to answer

According to Terminologia Anatomica, the distal phalanx is designated phalanx distalis. The term phalanx ungularis is an obsolete synonym.

12. Which part of a phalanx bears the articular fovea for articulation with the head of the proximally adjacent bone?

Head of phalanx

The base of a phalanx (basis phalangis) comprises an articular fovea (fovea articularis) that articulates with the head of a metacarpal bone or the proximally adjacent phalanx.
Shaft of phalanx

The base of a phalanx (basis phalangis) comprises an articular fovea (fovea articularis) that articulates with the head of a metacarpal bone or the proximally adjacent phalanx.
Base of phalanx

The base of a phalanx (basis phalangis) comprises an articular fovea (fovea articularis) that articulates with the head of a metacarpal bone or the proximally adjacent phalanx.
Tuberosity of distal phalanx

The base of a phalanx (basis phalangis) comprises an articular fovea (fovea articularis) that articulates with the head of a metacarpal bone or the proximally adjacent phalanx.
I find it difficult to answer

The base of a phalanx (basis phalangis) comprises an articular fovea (fovea articularis) that articulates with the head of a metacarpal bone or the proximally adjacent phalanx.

13. How many phalanges does the index finger have?

3 phalanges

The index finger comprises 3 phalanges—proximal, middle, and distal.
1 phalanx

The index finger comprises 3 phalanges—proximal, middle, and distal.
2 phalanges

The index finger comprises 3 phalanges—proximal, middle, and distal.
4 phalanges

The index finger comprises 3 phalanges—proximal, middle, and distal.
I find it difficult to answer

The index finger comprises 3 phalanges—proximal, middle, and distal.

14. According to anatomical classification, to which group of bones by shape do the carpal bones belong?

Long tubular bones

Carpal bones are classified as ossa brevia (short cancellous bones): they are approximately equal in all dimensions and contain cancellous bone covered by a thin cortical layer.
Flat bones

Carpal bones are classified as ossa brevia (short cancellous bones): they are approximately equal in all dimensions and contain cancellous bone covered by a thin cortical layer.
Short cancellous bones

Carpal bones are classified as ossa brevia (short cancellous bones): they are approximately equal in all dimensions and contain cancellous bone covered by a thin cortical layer.
Air-filled bones

Carpal bones are classified as ossa brevia (short cancellous bones): they are approximately equal in all dimensions and contain cancellous bone covered by a thin cortical layer.
I find it difficult to answer

Carpal bones are classified as ossa brevia (short cancellous bones): they are approximately equal in all dimensions and contain cancellous bone covered by a thin cortical layer.

15. With which carpal bones does os lunatum articulate?

With the radius, scaphoid, and triquetral bones, as well as the capitate and uncinate bones

Os lunatum articulates proximally with the radius and articular disc, laterally with the scaphoid, medially with the triquetral, and distally with the capitate and uncinate bones.
Only with the radius and scaphoid bone

Os lunatum articulates proximally with the radius and articular disc, laterally with the scaphoid, medially with the triquetral, and distally with the capitate and uncinate bones.
With the radius, ulna, scaphoid, and triquetral bones

Os lunatum articulates proximally with the radius and articular disc, laterally with the scaphoid, medially with the triquetral, and distally with the capitate and uncinate bones.
With the scaphoid, triquetral, and capitate bones, without articulation with the radius

Os lunatum articulates proximally with the radius and articular disc, laterally with the scaphoid, medially with the triquetral, and distally with the capitate and uncinate bones.
I find it difficult to answer

Os lunatum articulates proximally with the radius and articular disc, laterally with the scaphoid, medially with the triquetral, and distally with the capitate and uncinate bones.

16. Which carpal bone articulates with the first and second metacarpal bones and os trapezoideum?

Os hamatum

Os trapezium (trapezium bone) articulates distally with the first metacarpal bone (saddle joint), partially with the second metacarpal, and also with os trapezoideum and os scaphoideum.
Os capitatum

Os trapezium (trapezium bone) articulates distally with the first metacarpal bone (saddle joint), partially with the second metacarpal, and also with os trapezoideum and os scaphoideum.
Trapezium

Os trapezium (trapezium bone) articulates distally with the first metacarpal bone (saddle joint), partially with the second metacarpal, and also with os trapezoideum and os scaphoideum.
Os scaphoideum

Os trapezium (trapezium bone) articulates distally with the first metacarpal bone (saddle joint), partially with the second metacarpal, and also with os trapezoideum and os scaphoideum.
I find it difficult to answer

Os trapezium (trapezium bone) articulates distally with the first metacarpal bone (saddle joint), partially with the second metacarpal, and also with os trapezoideum and os scaphoideum.

17. Which joint is formed between os trapezium and the first metacarpal bone?

Ellipsoid joint

Articulatio carpometacarpalis pollicis is a typical saddle (sellaris) joint that permits abduction, adduction, flexion, extension, and opposition of the thumb.
Saddle joint

Articulatio carpometacarpalis pollicis is a typical saddle (sellaris) joint that permits abduction, adduction, flexion, extension, and opposition of the thumb.
Ball-and-socket joint

Articulatio carpometacarpalis pollicis is a typical saddle (sellaris) joint that permits abduction, adduction, flexion, extension, and opposition of the thumb.
Hinge joint

Articulatio carpometacarpalis pollicis is a typical saddle (sellaris) joint that permits abduction, adduction, flexion, extension, and opposition of the thumb.
I find it difficult to answer

Articulatio carpometacarpalis pollicis is a typical saddle (sellaris) joint that permits abduction, adduction, flexion, extension, and opposition of the thumb.

18. How many bones are present in total in the skeleton of the adult hand (manus), excluding sesamoid bones?

25

Skeleton of the hand: 8 carpal bones + 5 metacarpal bones + 14 phalanges (2 in the first digit and 3 in each of digits II–V) = 27 bones (excluding variable sesamoid bones).
27

Skeleton of the hand: 8 carpal bones + 5 metacarpal bones + 14 phalanges (2 in the first digit and 3 in each of digits II–V) = 27 bones (excluding variable sesamoid bones).
29

Skeleton of the hand: 8 carpal bones + 5 metacarpal bones + 14 phalanges (2 in the first digit and 3 in each of digits II–V) = 27 bones (excluding variable sesamoid bones).
32

Skeleton of the hand: 8 carpal bones + 5 metacarpal bones + 14 phalanges (2 in the first digit and 3 in each of digits II–V) = 27 bones (excluding variable sesamoid bones).
I find it difficult to answer

Skeleton of the hand: 8 carpal bones + 5 metacarpal bones + 14 phalanges (2 in the first digit and 3 in each of digits II–V) = 27 bones (excluding variable sesamoid bones).

19. Which of the following features is exclusive to os scaphoideum?

Presence of a hook-shaped process

The scaphoid comprises tuberculum ossis scaphoidei on its palmar surface and articulates with three bones of the distal row (trapezium, trapezoid, and capitate), as well as with the radius and lunate bone.
Presence of a tubercle on the palmar surface and articulation with three bones of the distal row

The scaphoid comprises tuberculum ossis scaphoidei on its palmar surface and articulates with three bones of the distal row (trapezium, trapezoid, and capitate), as well as with the radius and lunate bone.
Absence of articulation with the radius

The scaphoid comprises tuberculum ossis scaphoidei on its palmar surface and articulates with three bones of the distal row (trapezium, trapezoid, and capitate), as well as with the radius and lunate bone.
Articulation only with the lunate and triquetral bones

The scaphoid comprises tuberculum ossis scaphoidei on its palmar surface and articulates with three bones of the distal row (trapezium, trapezoid, and capitate), as well as with the radius and lunate bone.
I find it difficult to answer

The scaphoid comprises tuberculum ossis scaphoidei on its palmar surface and articulates with three bones of the distal row (trapezium, trapezoid, and capitate), as well as with the radius and lunate bone.

20. How many phalanges does the skeleton of the hand contain in total (all five digits)?

12

The thumb comprises 2 phalanges, and each of the other four digits comprises 3. Total: 2 + (4×3) = 14 phalanges in the skeleton of the hand.
14

The thumb comprises 2 phalanges, and each of the other four digits comprises 3. Total: 2 + (4×3) = 14 phalanges in the skeleton of the hand.
15

The thumb comprises 2 phalanges, and each of the other four digits comprises 3. Total: 2 + (4×3) = 14 phalanges in the skeleton of the hand.
16

The thumb comprises 2 phalanges, and each of the other four digits comprises 3. Total: 2 + (4×3) = 14 phalanges in the skeleton of the hand.
I find it difficult to answer

The thumb comprises 2 phalanges, and each of the other four digits comprises 3. Total: 2 + (4×3) = 14 phalanges in the skeleton of the hand.