Pelvic Girdle - Class #2 Flashcards

1
Q

the two bones that make up the pelvic girdle

A

innominate bones

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2
Q

the bony pelvis is made up of what 3 things?

A

1) sacrum
2) Coccyx
3) innominates

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3
Q

What are the 3 functions of the pelvis?

A

1) protection (abdomen and reproductive organs)
2) weight bearing
3) locomotion

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4
Q

what is the superior part of the innominate bone?

A

ilium

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5
Q

what is the inferior and posterior part of the innominate bone?

A

ischium

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6
Q

what is the inferior and anterior part of the innominate bone?

A

pubis

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7
Q

three bones meet at a large depression called the ______

A

acetabulum

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8
Q

3 facts about the acetabulum?

A

1) where 3 bones fuse
2) found on the external surface of the innominates
3) “socket” of the hip joint

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9
Q

fossa

A

hollow/depressed

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10
Q

tuberosity

A

large rounded elevation

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11
Q

notch

A

indentation at the end of bone

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12
Q

where is the attachment for the iliac muscle?

A

iliac fossa

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13
Q

spine

A

thorn-like projection

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14
Q

tubercle

A

small, raised part of bone (for ligament attachment)

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15
Q

ramus

A

bar of bone

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16
Q

foramen

A

hole or passageway through bone

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17
Q

acetabulum

A

where ilium, ischium and pubis meet

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18
Q

what surface of the innominate bone is the acetabulum found on?

A

external

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19
Q

which bony landmark is covered by the acetabular labrum

A

lunate surface

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20
Q

4 ways to identify the orientation of innominate bone

A

1) superiorly - iliac crest
2) inferiorly - obturator foramen
3) posteriorly - sciatic notch
4) laterally - acetabulum

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21
Q

crest

A

ridge of bone

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22
Q

line

A

linear elevation

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23
Q

5 fused vertebral bones, form the triangular shaped _____

A

sacrum

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24
Q

where is the sacrum located

A

posteriorly, between the innominate bones

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25
Q

is the sacrum convex or concave posteriorly

A

convex

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26
Q

the base of the sacrum articulates with what?

A

the disc of lumbar vertebrae #5

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27
Q

where is the sacral promontory located

A

directly under the base of the sacrum (on the anterior side)

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28
Q

where are the exits for nerves and blood vessels on the anterior surface of the sacrum?

A

anterior sacral foramina

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29
Q

auricular surface

A

ear shaped

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30
Q

what is analogous to spinous processes of vertebrae?

A

medial sacral crest

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31
Q

_____ is the enclosed passageway of the sacrum that houses nerves

A

sacral canal

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32
Q

what is the better name for the “tailbone”

A

coccyx

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33
Q

_____ is inferior to the sacrum

A

coccyx

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34
Q

___ fused vertebral bones make up the coccyx

A

4

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35
Q

why is the bony pelvis made up of large and heavy bones?

A

for weight bearing and locomotion

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36
Q

what complete shape does the bony pelvis form and why

A

complete circle and protects internal organs

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37
Q

inlet

A

brim

38
Q

pelvic inlet

A

superior opening

39
Q

what is the pelvic inlet delineated by

A

iliopectineal line and sacral promontory

40
Q

pelvic outlet

A

inferior opening

41
Q

true pelvis

A

inferior to pelvic inlet

42
Q

false pelvis

A

superior to pelvic inlet

43
Q

differences between inlet shape of bony pelvis in men and women

A

men -circular/heart

women - oval/wider

44
Q

differences between inlet width of bony pelvis in men and women

A

men - narrower

women - wider

45
Q

differences between sacral width of bony pelvis in men and women

A

men - narrower

women - wider (to accomodate space)

46
Q

differences between sacral curve of bony pelvis in men and women

A

men - curved in and under

women - less curved

47
Q

differences between pubic arch of bony pelvis in men and women

A

men - “v” shaped

women - “u” shaped

48
Q

the sacroiliac joint is the articulation between the _______ of the ilium and the __________ of the sacrum

A

articular surface of the ilium and the auricular surface of the sacrum

49
Q

what type of joint is the sacroiliac joint?

A

synovial - plane joint

50
Q

___ strong ligaments support the sacroiliac joint

A

5

51
Q

the weight of the upper body is transferred to the lower body through the _______ joint

A

sacroiliac joint

52
Q

what are the 5 ligaments of the sacroiliac joint?

A

1) anterior sacroiliac ligament
2) posterior sacroiliac ligament
3) iliolumbar ligament
4) sucrospinous ligament
5) sucrotuberous ligament

53
Q

what are the attachment points of the anterior sacroiliac ligament?

A

anterior sacrum to iliac fossa

54
Q

what are the attachment points of the posterior sacroiliac ligament?

A

sacral tuberosity to iliac tuberosity

55
Q

what are the attachment points of the iliolumbar ligament?

A

5th lumbar vertebrae to iliac crest

56
Q

what are the attachment points of the sacrospinous ligament?

A

posterior aspect of the sacrum to ischial spine

57
Q

what are the attachment points of the sacrotuberous ligament?

A

posterior aspect of the sacrum to ischial tuberosity

58
Q

what is the purpose of the anterior sacroiliac ligament, the posterior sacroiliac ligament and the iliolumbar ligament?

A

to resist the pulling apart of the innominate bones

59
Q

what is the purpose of the sacrospinous ligament and the sacrotuberous ligament?

A

resists tilting of the sacrum into pelvis

60
Q

which two ligaments cross to create the greater and lesser sciatic foramen

A

sacrospinous an sacrotuberous

61
Q

the symphysis pubis is the articulation between the ______ of each pubic bone

A

symphyscal surface

62
Q

what kind of joint is the symphysis pubis?

A

cartilaginous

63
Q

what gives the symphysis pubis slight, but minimal movement

A

dense fibrocartilage disc

64
Q

_______ cartilage is on the ends of the articulating surfaces of the symphysis pubis?

A

hyaline cartilage

65
Q

why does the dense fibrocartilage disc (and the sacroiliac joint) of the symphysis soften during pregnancy

A

for expansion of the birth canal (due to the hormone relaxin)

66
Q

what is the longest and heaviest bone in the body?

A

femur

67
Q

Angle of the femur

A

quadriceps “q” angle

68
Q

why does the femur have a q angle?

A

to support bipedal posture (obliquely angled towards the midline)

69
Q

increased angle of femur = what?

A

increase stress on knees = increased risk of injury to knee structures

70
Q

what are the degrees of the femur angle in men? women?

A

men - 14 degrees

women - 17 degrees

71
Q

which bony landmark provides blood supply to the head of the femur?

A

fovea capitis

72
Q

which condyle of the femur is longer and why?

A

medial condyle is longer than lateral – important for knee mechanics

73
Q

what is the difference between condyles and epicondyles

A

larger than epicondyle and participate in the joint

74
Q

3 ways to identify the orientation of the femur?

A

1) superiorly -head
2) anteriorly - patellar surface
3) posteriorly - condyles

75
Q

what type of joint is the hip joint

A

synovial - ball and socket - multi-axial

76
Q

what articulates n the hip joints

A

the acetabulum of the innominate bone articulates with the head of the femur

77
Q

______ of the acetabulum deepens “socket” of hip joint

A

labrum

78
Q

what are the 2 attachment points for the ligament of the head of the femur?

A

fovea capitis and acetabular notch

79
Q

what is another name for the ligament of the head of the femur?

A

ligamentum teres of the femur

80
Q

what are the 3 capsular ligaments that reinforce the hip joint and prevent excessive extension (hyperextension)

A

1) iliofemoral ligament
2) ischiofemoral ligament
3) pubofemoral ligament

81
Q

attachment points for the iliofemoral ligament

A

anterior inferior iliac spine to greeater trochanter and intertrochanteric lin

82
Q

attachment points for the ischiofemoral ligament

A

posterior acetabular margin (ischium) to greater trochanter and intertrochanteric line

83
Q

attahcment points for the pubofemoral ligament

A

body of pubis to neck of femur

84
Q

iliofemoral ligament restrictuon

A

hip hyperextension and external rotation

85
Q

ischiofemoral ligament restriction

A

hip hyperextension and medial rotation

86
Q

pubofemoral ligament restriction

A

hip hyperetenion and abduction

87
Q

reinforcement of iliofemoral ligament?

A

reinforces joint capsule anteriorly

88
Q

reinforcement of ischiofemoral ligament?

A

reinforces joint capsule superiorly and posteriorly

89
Q

reinforcement of pubofemoral ligament?

A

reinforces joint capsule inferiorly

90
Q

true or false: proximal attachment of ischiofemoral ligament is posterior while distal attachment is anterior

A

true