Hip biomechanics
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| Anterior/posterior tilt of the pelvis occurs in which plane and around which axis? | sagittal plane, frontal axis
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| Lateral pelvic tilt occurs in which plane and around which axis? | frontal plane, A-P axis
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| Anterior/posterior tilt results in what motions? | flexion/extension
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| Lateral pelvic tilt results in which motions? | abduction/adduction
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| Pelvic rotation occurs in which plane and around which axis? | transverse, vertical axis
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| Pelvic rotation results in which hip motions? | internal/external rotation
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| Coordinated hip/pelvis/spine motion is called what? | The lumbopelvic rhythm
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| Toe touch requires ___ degrees of hip flexion and ___ degrees of lumbar flexion? | 90, 45
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| What kind of joint is the hip? | diarthrodial tri-axial ball and socket joint
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| What is the closed packed position of the hip? | combined extension, internal rotation, and abduction
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| What is the open packed position of the hip? | 30 degrees of flexion, 30 degrees of abduction, and slight ER
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| A capsular pattern in the hip results in gross limitation of what motions? | flexion, IR, and some abduction
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| The acetabulum is made up of what three bones? | ilium, ischium, and pubis
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| What direction does the acetabulum face? | laterally, anteriorly, and inferiorly
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| What % of the head of the femur articulates with the acetabulum? | 70
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| What is normal forward angulation? | 12-15 degrees
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| Coxa vara is defined as? | angulation < 120
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| Coxa Valga is defined as? | angulation > 135
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| What is the angle of inclination? | angle between the shaft and the neck of the femur
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| What is the normal angle of inclination? | 125 degrees
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| What does coxa vara lead to? | Genu Valgum
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| What does coxa valga lead to? | Genu Varum
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| What condition lengthens the limb, reduces the effectiveness of the abductors, increases the load on the femoral head and reduces the load on the femoral neck? | Coxa Valga
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| What condition shortens the limb, increases the effectiveness of the abductors, reduces the load on the femoral head and increases the load on the femoral neck? | Coxa Vara
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| What is the angle of torsion? | Relationship between femoral head and femoral condyles
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| What is the normal angle of torsion? | 15 degrees
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| a decreased angle of torsion is called what? | retroversion
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| An increased angle of torsion is called what? | anteversion
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| Retroversion can lead to what? | toe out(duck feet)
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| Anteversion can lead to what? | toe in(pigeon toes)
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| Is the femoral neck inside or outside of the joint capsule? | inside(intracapsular)
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| The iliofemoral ligament runs from the base of the ____ to the _________ _________. | AIIS, Intertrochanteric Line
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| What is the strongedt ligament in the hip? | Iliofemoral ligament
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| What does the iliofemoral ligament prevent? | hyperextension in standing position
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| What ligament runs from anterior pubic ramus to anterior surface of the intertrochanteric fossa? | Pubofemoral ligament
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| The pubofemoral ligament reinforces the fibrous capsule where? | inferiorly and anteriorly
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| What ligament limits abduction and hyperextension? | pubofemoral ligament
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| What ligament originates on the ischial portion of the acetabulum and spirals to the neck of the femur and base of the greater trochanter? | Ischiofemoral ligament
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| What motion does the ishiofemoral ligament prevent? | hyperextension of the hip
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| What motions does the ishiofemoral ligament resist? | adduction and internal rotation
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| What ligament attaches to the acetabular notch and the transverse acetabular ligament to the pit in the head of the femur? | Ligamentum teres
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| What ligament provides blood supply to the head of the femur(primarily in younger populaiton)? | ligamentum teres
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| Normal hip flexion ROM is? | 0-120
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| Normal hip extension is? | 0-30
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| Normal hip internal and external rotation is? | 0-45
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| Normal hip adduction is? | 0-30
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| Normal hip abduciton is? | 0-45
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| What are the primary movers in hip flexion? | iliopsoas, sartorius, rectus femoris
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| What are the primary movers for hip extension? | glut max, hamstrings
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| What are the primary movers for hip abduction? | glut med and min
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| What are the primary movers for hip adduction? | adductor longus/magnus/brevis
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Created by:
txst sum 2009
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