hip arthrology-exam 2 Flashcards
mm. origin and insertion:
1. glute max (2)
2. rectus femoris
3. glute med/min
4. hamstrings
5. adductor magnus
6. TFL on pelvis
- o: pos. ilium; i: gluteal tuberosity
- o: ASIS; i: tibial tuberosity
- o: ilium; i: greater trochanter
- o: ischial tub.; i: tibia
- o: inf. pubic ramus; i: gluteal tuberosity
- o: ASIS; i: tubercle of iliotibial tract
coxa vara the hip bend ________
<______º
coxa valga the hip bend ________
> _________º
inward; <125º
outward >125º
Anteversion is excessive______ rotation and can be seen in pts. w/
internal rotation; coxa vara; genu valgum
Retroversion is excessive ____ rotation
ERot
deep cup-like socket:
acetabulum
Acetabular notch ___-___º opening
Acetabular fossa is the_______ of the fossa, no_________, no ______
filled w/ _________(5)
60-70º
floor; no cartilage, no contact
fat/blood, vessels/synovial membrane/ lig
The femoral head normally contacts the acetabulum ONLY along ____________
lunate surface
lunate surface is covered in ____________ and thickest along _____ region matching area of highest joint ________
articular cartilage; sup-ant. region; force
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
300%
20%; swing phase, 98% mid-stance
acetabular labrum:
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)
Capsule contains synovial membrane T or F?
True
Which ligaments reinforce the external capsule iliocapsularis, glutes minimus, and rectus femoris
lliofemoral, pubofemoral, ischiofemoral
iliofemoral ligament:
thick strong upside down “Y” med and lat: AIIS/rim of acetabulem to introchaneric line, full hip ext also full Erot elongates it
Pubofemoral ligament:
taught in hip aBd/ext and a bit in Erot.
Ischiofemoral ligament:
post. spirals, taught in Irot and aBd
Osteokinematics: Femoral-on-Pelvic
femur about a fixed pelvis
Osteokinematics: Pelvic-on-Femoral
rotation of the pelvic over fixed femurs
Pelvic on Femoral and Femoral on Pelvic may often occur simultaneously. T or F
True
Capsular Pattern CPP:
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)
Femoral-on-Pelvic: Sagittal Plane
Hip Flexion _____-______º and after usually leads to into _______ and ______
With LE extended ____-____º (________ tension)
Hip extension: _____-_____º
120-140º; posterior pelvic tilt; lumbar flexion
70-80º ; hamstring
18-30º
Femoral-on-Pelvic: Frontal Plane
aBd: ____-____º limited by _______ lig and ______mm’s
aDd: ____-_____º limited by _____,______,______mm’s
40-55º; pubofemoral; adductor
20-25º; aBd/piriformis/ITB
Femoral-on-Pelvic: Transverse Plane
IRot: ____-_____º and ERot ____-____º
30-45º
32-50º (> than IR)
What are the two types of lumbopelvic rhythm:
ipsidirectional and Contradirectional
Ipsidirectional:
lumbar spine and pelvis move in the same direction; maximizing angular displacement of the entire trunk.
Contradirrectional:
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.
Pelvic rotation in contradirectional: Sagittal Plane
motions:
hip flx/ ant. pelvic tilt/ lumbar spine ext
hip ext/post. pelvic tilt/ lumbar spine flex
Pelvic rotation in contradirectional: Frontal Plane
-aBd support hip __________—–> opposite iliac crest ______—-> opposite side spine _________
- aDd is _______
-structures that limit aBd/aDd
-in standing; hikes; lateral flexion (SB)
-opposite
-aBd: (adductors/ pubofemoral lig)
-aDd: (ITB/piriformis/ aBductors)
What pelvic rhythm occurs when walking?
contradirectional
What is happening in the osteokinematics of a soccer kick?
what is occuring at the hip when the non support LE rotates forward?
internal rotation of the hip
what is occuring when the non support LE rotates backward?
external rotation of the hip
in NWB/open chain hip adduction, what are the arthrokinematics?
convex on concave
femoral head rolls medial and glides lateral
in WB/closed chain hip adduction, what are the arthrokinematics?
concave on convex
acetabulum/pelvis roll medial and glide medial
malformed, does not fully cover the femoral head
dysplastic acetabulum
Acetabular Alignment:
the degree to which it faces anteriorly -
acetabular anteversion angle
