Lec. 9: kinesiology of hip and pelvis

Question 1

CPP, CP, and typ. dislocation of hip

Answer 1

CPP: ext, IR, ABD
CP: IR, FLEX, ABD
tpy. dislocation: POST, usually d/t major trauma (MVA- knees into dashboard)

Question 2

iliofemoral lig limits what

Answer 2

hyperext, POST pelvic tilt during relaxed standing

Question 3

pubofemoral lig limits what

Answer 3

hyperext, ER, abd

Question 4

ischiofemoral lig limits what

Answer 4

hyperext, IR, abd, hyperflex

Question 5

what is the angle of inclination of femur

Answer 5

an angle measured b/w the anatomic axis passing through the shaft of the femur and the axis passing through the femoral HD and NK, occurs in frontal plane

Question 6

occurs when the angle of inclination of the femur is <125 degrees

Answer 6

coxa varum

Question 7

occurs when the angle of inclination of the femur is >135 degrees

Answer 7

coxa valgum

Question 8

occurs when the angle of torsion of the femoral Nk is >15 degrees

Answer 8

femoral anteversion

Question 9

femoral anteversion results in what compensation at the toes

Answer 9

toe-in stance

Question 10

occurs when the angle or torsion of the femoral nk is <15 degrees

Answer 10

femoral retroversion

Question 11

femoral retroversion results in what compensation at the toes

Answer 11

toeing-out stance

Question 12

the ___ mms are generally stronger than the ___ mms d/t longer moment arm about the hip

Answer 12

adductors, abductors

Question 13

IR at hip limits ___ and ___ b/c the greater trochanter abuts the acetabular rim

Answer 13

FLEX and ABD

Question 14

arthrokin at hip in OKC

Answer 14

roll and glide in opposite directions

Question 15

arthrokin at hip in CKC

Answer 15

roll and glide in same direction

Question 16

ANT pelvic tilt is accompanied by lumbar ___ and POST pelvic tilt is accompanied by lumber ___

Answer 16

EXT, FLEX

Question 17

during R hip hiking, what is occurring at surrounding jts

Answer 17

-L hip becomes pivot point
-LAT lumbar flex to R side (unsupported side)
- slight vertebral body ROT to R
- hip ADD on R side
- hip ABD on L side

Question 18

DIST femur is ___ w/ coxa valga

Answer 18

ADD

Question 19

coxa valga of one leg can cause a longer leg, to accommodate this hip hiking of the longer leg occurs. Tightness of which mms follows

Answer 19

ITB and abductors of opposite side

Question 20

during R pelvic drop, what is occurring at surrounding jts

Answer 20

-L hip becomes pivot point
-ABD at R hip
-ADD at L hip
-L LAT FLEX of lumbar spine

Question 21

w/ coxa vara the DIST femur is ___

Answer 21

ABD

Question 22

coxa vara can result in a shorter leg, to accommodate this you may see ___ ___ on the short leg. This may result in patellar tracking issues and chronic knee pain

Answer 22

pelvic drop

Question 23

if the L side of pelvis anteriorly rotates (protracts, occurs w/ walking) the R hip becomes the ___ ___.
What mvts at surrounding jts occur.

Answer 23

pivot point
-IR at R hip
-ER at L hip
- L ROT of L/SP to keep eyes facing fwd

Question 24

lumbopelvic motion during full trunk (TR) FLEX involves what

Answer 24

FLEX of L/SP, and ANT pelvic tilt

Question 25

lumbopelvic motion during full hip ABD involves what

Answer 25

LAT FLEX of L/SP towards abducting side and LAT pelvic tilt

Question 26

synergistic action of the contralateral ___ and ___ keeps the pelvis symmetrical. Necessary for our bilateral stance

Answer 26

abductors and adductors

Question 27

in single leg standing (SLS) why is the compressive force in the hip greater than what would be expected from just supporting body weight

Answer 27

the abductors of the weight-bearing hip create compressive force pulling femoral HD into acetabulum in attempt to keep the pelvis neutral

Question 28

in SLS the abductors of the weight-bearing hip create compressive force pulling femoral HD into acetabulum in attempt to keep the pelvis neutral. What is this called

Answer 28

X-component of abductor force vector

Question 29

compressive force in hip during SLS is ~ ___x body weight. This increases to ~ ___x body weight during running

Answer 29

3, 10

Question 30

primary flexor of femur and TR, only mm able to continue flexing past 90 degrees (sitting)

Answer 30

iliopsoas

Question 31

mm that's relatively resistant to active insufficiency during simultaneous hip and knee flexion; external rotation of the hip is offset by internal rotation by TFL to achieve pure hip flexion

Answer 31

sartorius

Question 32

mm may become actively insufficient during full knee EXT and hip FLEX

Answer 32

rectus femoris

Question 33

order of firing of mms during hip EXT

Answer 33

hamstrings ipsilateral glute max contralateral lumbar erector spinae

Question 34

greatest force of contraction of hamstrings occurs at ~___ degrees hip flexion

Answer 34

35

Question 35

hamstrings may become actively insufficient during hip ___ and 90 degree ___ ___

Answer 35

EXT, knee FLEX

Question 36

flinging of the leg in the swing portion of gait could be a dysfunction of which mms

Answer 36

hamstrings

Question 37

forced anterior pelvic rotation on the side of weakness to swing leg forward could be a dysfunction of which mms

Answer 37

weak hip flexors (excluding iliopsoas), sartorius and rectus femoris

Question 38

order mm contractions during full hip ABD

Answer 38

glute med and min, TFL, quadratus lumborum

Question 39

if you observe contralateral pelvic drop in gait, “Trendelenburg lurch”, this could be dysfunction of which mms

Answer 39

glute med and min

Question 40

excessive hip flexion on heel–strike in gait, thus patient will move trunk posteriorly to accommodate (walks w/ pelvis pushed fwd) is a dysfunction of what mm

Answer 40

glute max

Question 41

fairly common injury usually involving the musculotendonous origin; imbalance between adductors and abductors

Answer 41

"groin pull" , strain of adductors

Question 42

if abdominal strength is insufficient to maintain trunk flexion against iliopsoas action, psoas major will cause what

Answer 42

lumbar extension rather than general trunk flexion