hip part 1

Question 1

what are the osteokinematic motions in the sagittal plane?

Answer 1

flexion 0-120º
extension 0-20º

Question 2

in OKC what is moving?

Answer 2

femur moving on relatively fixed pelvis

Question 3

what are the osteokinematic motions in the frontal plane?

Answer 3

abduction 0-45º
adduction 0-30º

Question 4

what is the only adductor muscle that crosses 2 joints?

Answer 4

gracilis (primary adductor also knee flexor- limited with knee extension)

Question 5

what are the osteokinematic motions in the transverse plane?

Answer 5

IR from anatomic neutral 0-55º
IR from flexion 0-45º
ER from anatomic neutral 0-55º
ER from flexion 0-45º

Question 6

why is there a 10º difference in the transverse plane between anatomic neutral and flexion (short sit) position?

Answer 6

because the posterior capsule becomes taut with and greater tension

Question 7

what are the normal osteokinematic ranges of the femur at the hip for gait?

Answer 7

flexion 30º
extension 10º
abd/add 5º each
IR/ER 5º each

Question 8

what are the arthrokinematic motions of the femur at the hip joint for OKC abduction?

Answer 8

superior roll and inferior glide

Question 9

what are the arthrokinematic motions of the femur at the hip joint for OKC adduction?

Answer 9

inferior roll and superior glide

Question 10

what are the arthrokinematic motions of the femur at the hip joint for OKC flexion?

Answer 10

anterior roll and posterior glide
spin

Question 11

what are the arthrokinematic motions of the femur at the hip joint for OKC extension?

Answer 11

posterior roll and anterior glide
spin

Question 12

what are the arthrokinematic motions of the femur at the hip joint for OKC IR?

Answer 12

medial/anterior roll and lateral/posterior glide

Question 13

what are the arthrokinematic motions of the femur at the hip joint for OKC ER?

Answer 13

lateral/posterior roll and medial/anterior glide

Question 14

for flexion and extension why is it a spin more so than a roll and glide?

Answer 14

because there isn’t really a pathway due to the acetabulum being deeper and labrum has a negative pressure

Question 15

what are the osteokinematic motions in the sagittal plane for the motions of the pelvis at the hip joint (CKC)?

Answer 15

posterior tilting and anterior tilting

Question 16

what is occurring for posterior tilting of the pelvis?

Answer 16

the pelvis moves posteriorly away from the femur= hip extension
the lumbar spine is in flexion
concentrically contract the rectus abdominus which pulls and rotates posteriorly

Question 17

what is occurring for anterior tilting of the pelvis?

Answer 17

the pelvis moves anteriorly closer to the femur= hip flexion
the lumbar spine is in extension
concentrically contract the erector spinae

Question 18

how do we determine hip abduction?

Answer 18

> 90º (increasing the angle) away from midline

Question 19

how do we determine hip adduction?

Answer 19

<90º (decreasing the angle) closer to midline

Question 20

if the angle at the hip increases= hip abduction what is the frontal plane motion occurring?

Answer 20

hemi-pelvic elevation

Question 21

if the angle at the hip decrease= hip adduction what is the frontal plane motion occurring?

Answer 21

hemi-pelvic depression

Question 22

if the femur is turned toward the pelvis what motion occurred?

Answer 22

hip internal rotation
toes turned in

Question 23

if the femur is turned away from the pelvis what motion occurred?

Answer 23

hip external rotation
toes turned out

Question 24

in the transverse plane if the pelvis is turned toward the femur what motion occurred?

Answer 24

internal rotation

Question 25

in the transverse plane if the pelvis is turned away from the femur what motion occurred?

Answer 25

external rotation

Question 26

what is the lumbopelvic rhythm?

Answer 26

in OKC either top down motion or bottom up motion at hip all segments move in the same direction as intended motion

Question 27

what is occurring in closed kinematic chain motions at the hip?

Answer 27

the head and feet stay fixed
the pelvis and lumbar spine go in opposite directions

Question 28

what is Janda’s Pelvic-Pelvic Crossed syndrome?

Answer 28

2 tissues that are adaptively lengthen and shortened on one side and 2 on the other side overtime

Question 29

if a patient is stuck in anterior tilt what would be adaptively lengthen and shortened?

Answer 29

shortened: hip flexors (iliopsoas and rectus femoris) and erector spinae
lengthened: rectus abdominis and hamstrings

Question 30

if a patient is stuck in posterior tilt what would be adaptively lengthen and shortened?

Answer 30

shortened: rectus abdominis and hamstrings
lengthened: hip flexors (iliopsoas and rectus femoris) and erector spinae