LECTURE 9: KIN OF HIP AND PELVIS

Question 1

Regarding kinesiology of the hip and pelvis, what is the primary joint to consider?

Answer 1

Coxofemoral (hip)

Question 2

What is the closed pack position of the hip joint?

Answer 2

Extension, internal rotation, abduction

Question 3

What is the capsular pattern of the hip joint?

Answer 3

Internal rotation, flexion, abduction

Question 4

What is the typical dislocation of the hip joint?

Answer 4

Posterior ( usually due to major trauma ie: knees into dash in MVA)

Question 5

What are the ligaments at the hip joint?

Answer 5

Iliofemoral
Pubofemoral
Ischiofemoral
Ligamentum teres
Zona orbicularis
Transverse acetabular
Labrum

Question 6

What are the MAIN 3 ligaments of the hip?

Answer 6

Iliofemoral
Pubofemoral
Ischiofemoral

Question 7

What does the Iliofemoral ligament do?

Answer 7

Limits hyperextension
Prevents posterior pelvic tilt during relaxed standing
Strongest of the 3 main hip ligaments

Question 8

What does the Pubofemoral lig do?

Answer 8

Limits hyperextension, lateral rotation an abduction

Question 9

What does the Ischiofemoral lig do?

Answer 9

Limits hyperextension, abduction and medial rotation
Also limits hyperflexion
Weakest of the main 3 ligaments of hip

Question 10

Coxa Vara occurs when the angle of inclination of the femoral neck is _______?

Answer 10

Less then 125 degrees

Question 11

Coxa Volga occurs when the angle of inclination is _____?

Answer 11

Greater then 135 degrees

Question 12

Femoral anteversion occurs when _____?

Answer 12

The femoral neck moves forward causing the leg to rotate internally .
( can cause pigeon toe or bow legs)

Question 13

Toe in stance is a result of?

Answer 13

Femoral anteversion

Question 14

Femoral retro version occurs when_____?

Answer 14

The neck of the femur rotates posteriorly causing external rotation.
Toes out
Usually congenital or physical trauma

Question 15

Toeing-out stance is a result of?

Answer 15

Femoral retro version

Question 16

What movements are permitted at the hip joint?

Answer 16

Flex-ex
Abd-add
Int rot-ex rot

Question 17

What muscles are generally stronger due to a longer moment arm?

Answer 17

Adductors

Question 18

Decreased ROM is often accompanied by compensations where?

Answer 18

The pelvis and lumbar spine

Question 19

What are the prime movers of the hip?

Answer 19

Iliopsoas
Rectus femoris
Sartorious
TFL
Hamstring group
Glute med, min, max
Adductor group
Deep 6

Question 20

What are synergistic muscles of the hip?

Answer 20

Abdominals
Sartorious
TFL

Question 21

What does iliopsoas do at the hip?

Answer 21

Prime hip flexor
Flexes trunk escpecially in sitting
Key in controlling vertebral and pelvic motion during leaning back and returning to an upright position
Acts with absdominals during sit up motions

Question 22

What does rectus femoris do at the hip?

Answer 22

Flexes the hip with knee flexed

Question 23

What does TFL do at the hip?

Answer 23

Acts synergistically with sartorious to eliminate hip rotation during flexion

Question 24

What do the hamstring group do at the hip?

Answer 24

All extend the hip (with or w/o resistance)

Question 25

What do glute med/min do at the hip?

Answer 25

Contract initially on hip ABD ( followed by TFL then quadratus lumborum)
Both contribute fo internal rotation during hip flex
Important in pelvic stabilization during unilateral stance

Question 26

What does glute max do at the hip?

Answer 26

Needs resistance to activate
Most active against resisted extension with the hip externally rotated

Question 27

What does the adductor group do at the hip?

Answer 27

Many hip add act to medically rotate the hip with simultaneous hip flexion
Important synergists to abductors during bilateral stance to stabilize pelvis

Question 28

What do the lateral rotators/deep six do at the hip?

Answer 28

Stabilizers of the hip
Piriformis externally rotates with the hip extended; internally rotates in hip flexion

Question 29

What happens during bilateral stance?

Answer 29

Synergistic action of adductors and abductors to maintain symmetrical pelvis

Question 30

What happens during unilateral stance?

Answer 30

Ipsilateral abductors maintain the pelvis level which resist gravitational torque ( which would result in a pelvic drop on the unsupported side)

Question 31

During hip hike hip ABD occurs on the ________ side while ADD occurs on the ______ side?

Answer 31

Supported
Unsupported

Question 32

During hip-hike, the lateral lumbar flexion moves toward______ to maintain balance?

Answer 32

The unsupported

Question 33

During a pelvic drop hip ABD occurs on the _____ and ADD on the _____ side?

Answer 33

Unsupported
Supported

Question 34

In regards to the hip/pelvis, a posterior tilt is equivalent of which motion?

Answer 34

Hip extension

Question 35

In regards to the hip/pelvis, an anterior tilt is equivalent to what motion?

Answer 35

Hip flexion