Quiz 6: Wrist and Hand

Question 1

Short, thick metacarpal with single proximal articulation

Answer 1

MC1 (Thumb)

Question 2

MC1 articulates with (1)

Answer 2

Trapezium

Question 3

How to side MC1

Answer 3

1. Crest = Lateral
2. Shaft meets base, flared slightly lateral
3. Lateral palmar surface = larger and more excavated
4. Viewed dorsally w/ distal end up = Axis of max length skewed toward the side the bone is from

Question 4

Longest metacarpal, blade-like wedge (butt)

Answer 4

MC2

Question 5

MC2 Articulations (4)

Answer 5

Trapezium, trapezoid, capitate, MC3

Question 6

How to side MC2

Answer 6

1. Blade-like wedge = palmar, ulnar, and medial
2. Double articular facet for MC3 is medial
3. Single-side articular facet for trapezium is radial and lateral

Question 7

Styloid process, second longest metacarpal, base has sharp projection

Answer 7

MC3

Question 8

Articulations of MC3 (3)

Answer 8

Capitate, MC2, MC4

Question 9

How to side MC3

Answer 9

1. Styloid process is dorsal, radial, lateral
2. Double articular facet for MC2 is lateral
3. Articulation with MC4 (medial) is also a double facet but is separate circles

Question 10

Slender and gracile metacarpal, two circle facets on one side and flat facet on the other

Answer 10

MC4

Question 11

Articulations of MC4 (3)

Answer 11

Hamate, MC3, MC5

Question 12

How to side MC4

Answer 12

1. Two circles facet (art. for MC3) = Lateral
2. Single, long facet (art. for MC5) = Medial
3. Proximal and medial basal facets form a right angle

Question 13

Shortest (besides MC1), slender metacarpal

Answer 13

MC5

Question 14

Articulations of MC5 (2)

Answer 14

Hamate, MC4

Question 15

How to side MC5

Answer 15

1. Only one articular facet = MC 4 = Lateral
2. Non-articular side = Medial, away from MC4

Question 16

MC 2-5 proximal (basal) articulations go from _______ shape to ________ shape if you go medially (ulnar) and get smaller

Answer 16

Triangular to square

Question 17

Which two metacarpals have a rounded, square base

Answer 17

MC1 and MC 5

Question 18

Proximal row

Answer 18

Scaphoid, Lunate, Triquestral, Pisiform

Question 19

Distal Row

Answer 19

Trapezium, Trapezoid, Capitate, Hamate

Question 20

Which two carpals articulate with the radius

Answer 20

Scaphoid, Lunate

Question 21

Trapezium articulates with which metacarpal(s)

Answer 21

MC 1 and 2

Question 22

Trapezoid articulates with which metacarpal

Answer 22

MC 2

Question 23

Capitate articulates with which metacarpal(s)

Answer 23

MC 2 and 3 (sometimes 4)

Question 24

Hamate articulates with which metacarpal(s)

Answer 24

MC 4 and 5

Question 25

Boat shaped carpal, articulates with radius (radial facet) and capitate

Answer 25

Scaphoid

Question 26

Palmar and lateral attachment site for flexor retinaculum muscle on the scaphoid

Answer 26

Scaphoid tubercle

Question 27

Moon shaped carpal, 5 art. facets, concave/distal side articulates with capitate, convex/proximal side art. with radius

Answer 27

Lunate

Question 28

Triangular-shaped carpal, third from the thumb, 3 articular surfaces for the Hamate, Lunate, and pisiform

Answer 28

Triquetral

Question 29

Pea-shaped, small carpal, most medial in proximal row, sesamoid bone, attachment site for flexor retinaculum muscle, single art. facet with triquetral

Answer 29

Pisiform

Question 30

Most lateral of the distal row carpals, saddle-shaped art. facet for MC1 and smaller facet for MC2

Answer 30

Trapezium

Question 31

Prominent, raised ridge of bone on palmar surface, attachment site for flexor retinaculum on Trapezium

Answer 31

Trapezial ridge

Question 32

Boot shaped carpal, smallest in distal row, only articulates with MC2 (in terms of MC's)

Answer 32

Trapezoid

Question 33

Head shaped carpal, large, articulates with MC3 and MC2 (lesser)

Answer 33

Capitate

Question 34

______ of capitate articulates proximally with scaphoid and lunate

Answer 34

head

Question 35

Wedge-shaped carpal, 5 art. facets, most medial of distal row

Answer 35

Hamate

Question 36

Prominent hook shaped bony projection on palmar side of hamate, attachment site for flexor retinaculum

Answer 36

hamulus

Question 37

All attachments for flexor retinaculum muscle

Answer 37

Scaphoid, trapezium, pisiform, hamate