General pelvis Flashcards

1
Q

where is the pelvis located?

A

below abdomen

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2
Q

pelvis contains support and protects ?

A

bladder, rectum and reproductive organs

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3
Q

bones of pelvis provides attachments to some muscles of ?

A

trunk and lower limb

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4
Q

illium + ishium + pubis =

A

hip bone

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5
Q

hip bone + sacrum =

A

pelvic girdle

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6
Q

what bone is the bone that we sit on

A

ishium

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7
Q

lower back pain can come from which joint?

A

sacroilliac joint

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8
Q

head of femur sits on which structure?

A

acetabulum

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9
Q

whats a promontory

A

junction between L5 and S1

bulges inward

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10
Q

pelvic inlet boundaries

A

anterior: pubic crest
lateral: pecten pubis, arcuate line and margin ala
posterior: promontory of sacrum

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11
Q

pelvic outlet borders

A

anterior: inferior margin of pubic symphysis
lateral: ischial tuberosity and ischiopubic ramus
post. lateral: inferior margin of sacrotuberous lig
inferior: anterior border of the coccyx

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12
Q

why is it called a false pelvis

A

because its found in the abdominal cavity (colon is found there)

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13
Q

inlet diameters

A

antero posterior -> between sacral promontory and upper border of pubic symphysis (10cm)

transverse -> between opposite sides of pelvic brim (12.5cm)

oblique diameter -> between illiopubic eminence and opposite sacroiliac joint (11.5 cm)

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14
Q

outlet diameters

A

antero-posterior -> distance from the pubis to the sacrococcygeal joint (12.5 cm)

transverse -> ischial tuberosities along the plane passing through anus (10cm)

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15
Q

diagonal conjugate

A

most useful measurment
called the birth canal
from the lower border of the pubis to the sacral promontory
12.5cm

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16
Q

what makes the diagonal conjugate important and most useful?

A

Estimates pelvis size, if it is smaller than normal, the fetus will not pass through and will require a c section

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17
Q

compare male and female pelvis: general structure

A

females: light and thin
males: heavy and thick

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18
Q

compare male and female pelvis: false pelvis

A

females: shallow
males: deep

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19
Q

compare male and female pelvis: pelvic inlet

A

females: larger and more oval
males: smaller and heart shaped

20
Q

compare male and female pelvis: acetabellum

A

females: small and faces anteriorlly
males: large and faces laterally

21
Q

compare male and female pelvis: obturator foramen

A

female: oval
male: round

22
Q

compare male and female pelvis: pubic arch

A

females: greater than 90 degree angle
males: less than 90 degrees angle

23
Q

ilium parts

A
iliac crest
iliac tubercle
ASIS
anterior inferior iliac spine (AIIS)
PSIS
PIIS
greater sciatic notch
24
Q

Ischium parts

A

ischial spine (between greater and lesser sciatic notch)
ischial tuberosity
ischial ramus
lesser sciatic notch

25
Q

pubic bone

A

superior ramus of pubis
pubic tubercle
body of pubis
ischiopubic ramus

26
Q

what passes through sacral canal

A

nerves

27
Q

parts of sacrum with explanation (if needed):

A

sacral promontory (btwen l5 to s1)
anterior sacral foramina (bigger size than posteior)
posterior sacral foramina
transverse ridges (where sacral vertebra join)
lateral sacral crest
median sacral crest
sacral hiatus (termination of sacral canal)
coccyx (tail bone)

28
Q

what convert lesser sciatic and greater sciatic notches to formaina

A

sacrospinous ligament and sacrotuberous ligament

29
Q

what runs down the anterior surface of the spine

A

anterior Longitudinal ligament

30
Q

what links hip bones

A

pubic symphysis

31
Q

contents of greater sciatic foramen

A

Sciatic nerve
superior gluteal and inferior gluteal nerve
posterior femoral cutaneous nerve

superior and inferior gluteal artery and vein

piriformis muscle

32
Q

contents of lesser sciatic foramen

A

pudendal nerve
pudendal artery and vein
obturator internus muscle

33
Q

anterior pelvic wall

A

posterior surface of the bodies of pubic bones

34
Q

posterior pelvic wall

A

sacrum and coccyx, piriformis muscle and parietal pelvic fascia

35
Q

lateral pelvic wall

A

hip bone, obturator membrane, sacrotuberous and sacrospinous ligament and obturator internus muscles with its fascia

36
Q

pelvic floor or inferior pelvic wall

A

pelvic diaphragm

37
Q

what does pelvic diaphragm consist of?

A

levitator ani and coccygeous muscle

38
Q

piriformis: origin, insertion, actions, and nerve

A

origin: sacrum
insertion: greater trocanter
actions: external rotator of the thigh
nerve: nerve to the piriformis (L5, S1 and S2)

39
Q

obturator internus: origin, insertion, actions, an nerve

A

origin: the inner surface of the obturator membrane and adjoining part of the hip bone
insertion: greater trochanter
function: lateral rotator of hip joint
Nerve to obturator internus from sacral plexus of nerves

40
Q

levator ani parts

A

pubococcygeal muscle

iliococcygeus muscle

41
Q

another word for ischiococcygeus muscle

A

coccygeal muscle

42
Q

levator ani nerve supply

A

s4 and pudendal nerve

43
Q

leviator ani function

A

prevents prolapse
supports pelvic organs
forms a sphincter around the anorectal junction and vagina

44
Q

levator ani origin and insertion

A

orgin: body of pubis, fascia obterator internus and spine of ischium
inserstion: perineal body, anococcygeal body, walls of prostate, vagina, rectum and anal canal

45
Q

attachments of coccygeus muscle

A

spine of ischium to lower end of sacrum, coccyx

46
Q

nerve supply and function of coccygeus muscle

A

s4-s5

function: assists levator ani to support pelvic viscera

47
Q

damage of pelvic floor can lead to

A

urinary incontinence: (unintentional passage of urine)

pelvic organ prolapse: (slip down of pelvic organs from their original position)