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3 Anatomy > Anatomy of the Bony Pelvis > Flashcards

Anatomy of the Bony Pelvis Flashcards

1
Q

bony pelvis consists of what 4 structures?

A

2 innominate bones
saccrum
coccyx

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2
Q

what 3 bones make up the innominate bones?

A

ilium
ischium
pubis

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3
Q

most anterior component of the innominate bones?

A

pubis

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4
Q

anterior connection of the innominate bones?

A

pubic symphysis

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5
Q

posterior connection of the innominate bones?

A

sacrum

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6
Q

where is the ileal tubercle located?

A

5cm posterior to ASIS

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7
Q

what GI organ sits in the left iliac fossa

A

sigmoid colon

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8
Q

what muscle exists in the iliac fossa?

A

iliacus

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9
Q

posterior muscle attachment to gluteal side of the ileum?

A

gluteus medius

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10
Q

what nerve runs around the ischial spine?

A

pudental

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11
Q

what muscle group originates from the ischial tuberosity?

A

hamstrings

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12
Q

what structure divides the greater and lesser sciatic notches?

A

ischial spine

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13
Q

attachment for external genitalia on pelvis?

A

ischiopubic ramus

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14
Q

what part of the pubic ramus forms part of the ischiopubic ramus?

A

inferior pubic ramus

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15
Q

what part of the pelvis can be used to differentiate males from females?

A

pubic arch (Flares out more in female, thicker in male)

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16
Q

what kind of joint is the pubic symphysis?

A

secondary cartilaginous

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17
Q

the sacroiliac joint is very mobile T or F

A

F, very stable

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18
Q

sacroiliac joint has a/an ___ ligament going through it

A

interosseus (all symphyses are)

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19
Q

why is there a cartilaginous joint in the pelvis?

A

allows for flexibility

allows for pregnancy

20
Q

inguinal ligament attaches between…

A

ASIS and pubic tubercle

21
Q

top of iliac crests is at what vertebral level?

A

L4

22
Q

how can you bimanually palpate the ischial spines?

A

finger depth into the vagina at about 4 and 8 o’clock

23
Q

where is the pubic tubercle in relation to the pubic symphysis?

A

inferolateral

24
Q

what foramen separates the ischiopubic ramus and the pubis?

A

obturator foramen

25
Q

name the 2 main ligaments of the pelvis? name their origins and insertions?

A

sacrotuberous (sacrum to PT)

sacrospinous (ischial spine to sacrum)

26
Q

what nerves exit through the greater sciatic foramen?

A

sciatic

pudental

27
Q

what nerve enters via the lesser sciatic foramen?

A

pudental

28
Q

main role of the pelvic ligaments?

A

ensure the inferior sacrum is not pushed superiorly when weight is transferred vertically eg during jumping/late pregnancy

29
Q

pelvic ligaments contract/relax during late pregnancy

A

relax

30
Q

name the components of the pelvic inlet

A

sacral promontory
ilium
superior pubic ramus
pubic symphysis

31
Q

name the components of the pelvic outlet

A 
pubic symphysis
ischiopubic ramus
ischial tuberosities
sacrotuberous ligaments
coccyx
32
Q

the pelvic inlet/outlet is composed completely of bone

A

inlet

33
Q

what muscle divides the pelvic cavity from the perineum?

A

levator ani (the pelvic floor)

34
Q

weakest point of the pelvis?

A

anterior area

35
Q

main worry about pelvic bleeding?

A

its very internal so you cant see it superficially

36
Q

main difference in the pelvis between males and females?

A

AP and transverse diameters larger in F;
pubic arch + suprapubic angle are larger in F;
shallower pelvic cavity in F

37
Q

what suture separates the frontal bones of the foetus?

A

myopic suture

38
Q

what suture separates the frontal and parietal bones of the foetus?

A

coronal suture

39
Q

bulging fontanelles indicate..

A

increase ICP

40
Q

sunken fontanelles indicate…

A

malnutrition and dehydration

41
Q

anterior fontanelle closes between…

A

9 and 18 months

42
Q

what suture separates the parietal bones of a foetus?

A

sagittal

43
Q

in the pelvic inlet the babys head should be facing…

A

right or left

44
Q

in the pelvic outlet the babys head should be facing…

A

occipitoanterior position (occipital bone facing vertically, ie face down)

45
Q

what are the 2 diameters of the foetal skull and where they lie?

A

occpitofrontal

biparietal

46
Q

what diameter is longer in the foetus?

A

occipitofrontal and in extension (because babys head is longer than it is wide)

47
Q

what is the “station”?

A

distance of the foetal head from the ischial spines

3 Anatomy (20 decks)

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