hip arthrology-exam 2

Question 1

mm. origin and insertion:
1. glute max (2)
2. rectus femoris
3. glute med/min
4. hamstrings
5. adductor magnus
6. TFL on pelvis

Answer 1

1. o: pos. ilium; i: gluteal tuberosity
2. o: ASIS; i: tibial tuberosity
3. o: ilium; i: greater trochanter
4. o: ischial tub.; i: tibia
5. o: inf. pubic ramus; i: gluteal tuberosity
6. o: ASIS; i: tubercle of iliotibial tract

Question 2

coxa vara the hip bend ________
<______º

coxa valga the hip bend ________
> _________º

Answer 2

inward; <125º
outward >125º

Question 3

Anteversion is excessive______ rotation and can be seen in pts. w/

Answer 3

internal rotation; coxa vara; genu valgum

Question 4

Retroversion is excessive ____ rotation

Answer 4

ERot

Question 5

deep cup-like socket:

Answer 5

acetabulum

Question 6

Acetabular notch ___-___º opening
Acetabular fossa is the_______ of the fossa, no_________, no ______
filled w/ _________(5)

Answer 6

60-70º
floor; no cartilage, no contact
fat/blood, vessels/synovial membrane/ lig

Question 7

The femoral head normally contacts the acetabulum ONLY along ____________

Answer 7

lunate surface

Question 8

lunate surface is covered in ____________ and thickest along _____ region matching area of highest joint ________

Answer 8

articular cartilage; sup-ant. region; force

Question 9

Forces 13% swing to ______% BW in midstance
The area of joint contact increases from about _____% of lunate surface during the _______ phase to about ________% during __________ phase

Answer 9

300%
20%; swing phase, 98% mid-stance

Question 10

acetabular labrum:

Answer 10

strong, flexible ring of fibrocartilage rim of the acetabulum
provides mechanical stability ‘grip’ and deepens the socket
mechanical seal keeps negative pressure, fluid sealed
poorly vascularized but well innervated (pain & proception)

Question 11

Capsule contains synovial membrane T or F?

Answer 11

True

Question 12

Which ligaments reinforce the external capsule iliocapsularis, glutes minimus, and rectus femoris

Answer 12

lliofemoral, pubofemoral, ischiofemoral

Question 13

iliofemoral ligament:

Answer 13

thick strong upside down “Y” med and lat: AIIS/rim of acetabulem to introchaneric line, full hip ext also full Erot elongates it

Question 14

Pubofemoral ligament:

Answer 14

taught in hip aBd/ext and a bit in Erot.

Question 15

Ischiofemoral ligament:

Answer 15

post. spirals, taught in Irot and aBd

Question 16

Osteokinematics: Femoral-on-Pelvic

Answer 16

femur about a fixed pelvis

Question 17

Osteokinematics: Pelvic-on-Femoral

Answer 17

rotation of the pelvic over fixed femurs

Question 18

Pelvic on Femoral and Femoral on Pelvic may often occur simultaneously. T or F

Answer 18

True

Question 19

Capsular Pattern CPP:

Answer 19

the greatest simultaneous stretch to many structures: full ext (20º)/ slight Irot and aBd
-least amount of joint “play”
-hip has no max joint congruency
– which is 90º flx, / mod. aBd and Erot
—(femoral head seated best)

Question 20

Femoral-on-Pelvic: Sagittal Plane

Hip Flexion _____-______º and after usually leads to into _______ and ______
With LE extended ____-____º (________ tension)
Hip extension: _____-_____º

Answer 20

120-140º; posterior pelvic tilt; lumbar flexion
70-80º ; hamstring
18-30º

Question 21

Femoral-on-Pelvic: Frontal Plane
aBd: ____-____º limited by _______ lig and ______mm’s
aDd: ____-_____º limited by _____,______,______mm’s

Answer 21

40-55º; pubofemoral; adductor
20-25º; aBd/piriformis/ITB

Question 22

Femoral-on-Pelvic: Transverse Plane
IRot: ____-_____º and ERot ____-____º

Answer 22

30-45º
32-50º (> than IR)

Question 23

What are the two types of lumbopelvic rhythm:

Answer 23

ipsidirectional and Contradirectional

Question 24

Ipsidirectional:

Answer 24

lumbar spine and pelvis move in the same direction; maximizing angular displacement of the entire trunk.

Question 25

Contradirrectional:

Answer 25

lumbar spine and pelvis move in opposite directions, supra lumbar (above L1) can stay nearly stationary used in walking where head and eyes need to be still.

Question 26

Pelvic rotation in contradirectional: Sagittal Plane
motions:

Answer 26

hip flx/ ant. pelvic tilt/ lumbar spine ext
hip ext/post. pelvic tilt/ lumbar spine flex

Question 27

Pelvic rotation in contradirectional: Frontal Plane

-aBd support hip __________—–> opposite iliac crest ______—-> opposite side spine _________
- aDd is _______
-structures that limit aBd/aDd

Answer 27

-in standing; hikes; lateral flexion (SB)
-opposite
-aBd: (adductors/ pubofemoral lig)
-aDd: (ITB/piriformis/ aBductors)

Question 28

What pelvic rhythm occurs when walking?

Answer 28

contradirectional

Question 29

What is happening in the osteokinematics of a soccer kick?

Question 30

what is occuring at the hip when the non support LE rotates forward?

Answer 30

internal rotation of the hip

Question 31

what is occuring when the non support LE rotates backward?

Answer 31

external rotation of the hip

Question 32

in NWB/open chain hip adduction, what are the arthrokinematics?

Answer 32

convex on concave
femoral head rolls medial and glides lateral

Question 33

in WB/closed chain hip adduction, what are the arthrokinematics?

Answer 33

concave on convex
acetabulum/pelvis roll medial and glide medial

Question 34

malformed, does not fully cover the femoral head

Answer 34

dysplastic acetabulum

Question 35

Acetabular Alignment:
the degree to which it faces anteriorly -

Answer 35

acetabular anteversion angle