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Flashcards in pelvis and hip (brian) Deck (74)
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1

when does trirardiate cartilage fuse?

14-16yo

2

what type of joint is the pubic symphysis?

non-synovial amphiarthroidal joint

has fibrocartilagenous disc

3

what are the pubic symphysis ligaments? which is strongest?

superior pubic ligament (strongest)

inferior (arcuate) pubic ligament

4

coccyx points which way?

men: anteriorly

women: vertically

5

signs of sacral dysmorphism? clinical relevance?

sacralization of L5

lumbarization of S1

mamillary processes

oval/oblong foramina

tongue-in-groove sign

narrowed S1 tunnel (for SI screws)

 

recessed sacral ala puts L5 nerve root at risk when XRays appear to show intraosseous screws

6

what type of joint is the SI joint? when does it fuse?

diarthroidal, gliding synovial

 

fuses by age 50

7

list the SI joint ligaments

anterior SI ligs

posterior SI ligs

interosseous SI ligs

8

what ligament runs from:

sacrum to ischial spine

sacrum to ischial tuberosity

iliac crest to L5 transverse process

sacrospinous

sacrotuberous

iliolumbar

9

boundaries of greater sciatic notch?

ischial spine

ilium

sacrospinous ligament

10

greater sciatic notch contents SUPERIOR to piriformis muscle

superior gluteal n and a (and v, vena comitantes)

11

contents of greater sciatic notch INFERIOR to piriformis muscle

POPS IQ

 

pudendal n and internal pudendal a (and v, vena comitantes)

nerve to Obturator internus

posterior femoral cutaneous n

sciatic n

inferior gluteal n and a (and v, vena comitantes)

nerve to Quadratus femoris

12

boundaries of the lesser sciatic notch

ischial spine

ischial tuberosity

sacrospinous lig

sacrotuberous lig

13

contents of lesser sciatic notch

obturator internus

nerve to obturator internus

pudendal n

internal pudendal a (and v)

14

what is the obturator canal and what does it contain?

opening at superior end of obturator membrane

obturator n,a,v pass thru it

15

normal femoral anteversion as adult and at birth?

15 deg.  30-40deg at birth

16

normal neck shaft angle of femur of adult and at birth?

127 deg.  150 at birth.

17

acetabular anteversion?

15 deg

18

name the ligaments that make up the hip capsule.   What is strongest?

anterior:

iliofeoral lig (Y-lig of bigelow) - strongest lig in body.  from AIIS to intertroch line

pubofemoral lig

 

posterior: 

ischiofemoral lig

19

what is the zona orbicularis?

circular fibres forming a collar at femoral neck - like its own "annular ligament"

20

acetabular labrum is ____ with the cartilage posteriorly and _____ anteriorly

continuous, marginally attached

21

acetabular labrum functions: name 2

deepens socket by 30%

seals fluid - protects cartilage

22

adequate AP pelvis xray: list criteria

coccyx in-line with symphysis

symmetrical teardrops, obturator foramina, iliac wings

symphysis to sacro-coccygeal junction vertical distance (difficult to see): 32mm men, 47mm women

 

sympysis to tip of cocyx: 1-3cm

23

what is the utility of frog-leg lateral xray of hip?

profile of head/neck junction

see subtle SCFEs

24

How is the Dunn view taken?

what is its utility?

hip flexed to 45 or 90

20 deg abduction, neutral rotation

beam shot straight down at hip

utility: profiles head/neck junction to check alpha angle for FAI (<55 deg=CAM)

25

how do you take a false profile xray?

 

what is its utility?

standing patient

ER body relative to cassette 65 deg

beam centred on fem head

 

utility: for anterior CEA: <20=dysplasia, >40=pincer

26

what spinal level is the aortic bifurcation?

 

common iliac bifurcation?

L4, S1

27

name the internal iliac artery branches

obturator

superior gluteal

inferior gluteal

internal pudendal

vesicular

lateral sacral

28

what is the corona mortis and where is it?

anatomic variant

anastomosis between obturator artery and either external iliac or inf epigastric artery

 

ocurs variable distance from symphysis, behind sup pub ramus (40-96mm from symphysis)

29

what two major arteries supply the proximal femur?

they are branches of what?

MFCA and LFCA

branch of profunda femoris

30

describe the path of the superficial femoral artery

(start from external iliac artery)

external iliac artery crosses under inguinal ligament into femoral triangle

becomes common femoral artery

divides into profunda femoris and superficial femoral artery

SFA runs along anteromedial thigh under sartorius

in hunter's canal

between vastus med and adductor longus

exits through adductor hiatus

goes through adductor hiatus and becomes popliteal artery