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Human Skeletal Biology > Quiz 6: Wrist and Hand > Flashcards

Quiz 6: Wrist and Hand Flashcards

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1
Q

Short, thick metacarpal with single proximal articulation

A

MC1 (Thumb)

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2
Q

MC1 articulates with (1)

A

Trapezium

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3
Q

How to side MC1

A
  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
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4
Q

Longest metacarpal, blade-like wedge (butt)

A

MC2

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5
Q

MC2 Articulations (4)

A

Trapezium, trapezoid, capitate, MC3

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6
Q

How to side MC2

A
  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
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7
Q

Styloid process, second longest metacarpal, base has sharp projection

A

MC3

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8
Q

Articulations of MC3 (3)

A

Capitate, MC2, MC4

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9
Q

How to side MC3

A
  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
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10
Q

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

A

MC4

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11
Q

Articulations of MC4 (3)

A

Hamate, MC3, MC5

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12
Q

How to side MC4

A
  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
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13
Q

Shortest (besides MC1), slender metacarpal

A

MC5

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14
Q

Articulations of MC5 (2)

A

Hamate, MC4

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15
Q

How to side MC5

A
  1. Only one articular facet = MC 4 = Lateral
  2. Non-articular side = Medial, away from MC4
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16
Q

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

A

Triangular to square

17
Q

Which two metacarpals have a rounded, square base

A

MC1 and MC 5

18
Q

Proximal row

A

Scaphoid, Lunate, Triquestral, Pisiform

19
Q

Distal Row

A

Trapezium, Trapezoid, Capitate, Hamate

20
Q

Which two carpals articulate with the radius

A

Scaphoid, Lunate

21
Q

Trapezium articulates with which metacarpal(s)

A

MC 1 and 2

22
Q

Trapezoid articulates with which metacarpal

A

MC 2

23
Q

Capitate articulates with which metacarpal(s)

A

MC 2 and 3 (sometimes 4)

24
Q

Hamate articulates with which metacarpal(s)

A

MC 4 and 5

25
Q

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

A

Scaphoid

26
Q

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

A

Scaphoid tubercle

27
Q

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

A

Lunate

28
Q

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

A

Triquetral

29
Q

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

A

Pisiform

30
Q

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

A

Trapezium

31
Q

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

A

Trapezial ridge

32
Q

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

A

Trapezoid

33
Q

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

A

Capitate

34
Q

______ of capitate articulates proximally with scaphoid and lunate

A

head

35
Q

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

A

Hamate

36
Q

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

A

hamulus

37
Q

All attachments for flexor retinaculum muscle

A

Scaphoid, trapezium, pisiform, hamate

Human Skeletal Biology (6 decks)

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