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Mahoney - pelvis and hip
2nd biomechanics exam
50
Medical
Professional
02/16/2013

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Cards

Term
2 joints of the pelvis
Definition
symphysis pubis (synchondrosis)
sacroiliac (syndesmosis)
Term
left lateral pelvic tilt
Definition
frontal plane motion
left side moves upward
Term
right lateral pelvic tilt
Definition
frontal plane motion
right side moves upward
Term
left transverse pelvic tilt
Definition
transverse plane motion
left side moves posterior
Term
right transverse pelvic tilt
Definition
transverse plane motion
right side moves posterior
Term
angle of inclination of the femur - definition
Definition
angle in the frontal plane formed by the axis of the head and neck of the femur and the shaft of the femur
Term
angle of inclination of the femur - infant
Definition
150 degrees
Term
angle of inclination of the femur - adult (by the age of 4)
Definition
125 degrees
Term
coxa vara
Definition
a decrease in the angle of inclination
distal femur is directed towards the midline
knees are closer together (genu valgum)
Term
coxa valga
Definition
an increase in the angle of inclination
distal femur is directed away from the midline
knees are farther apart (genu varum)
Term
genu valgum
Definition
deformity at the hip
knees are closer together - knock kneed
Term
genu varum
Definition
deformity at the hip
knees are farther apart - bow legged
Term
varus
Definition
distal end of the distal bone comprising a joint points towards the midline
Term
valgus
Definition
distal end of the distal bone comprising a joint points away from the midline
Term
alsberg's angle - definition
Definition
angle formed by a line through the epiphyseal plate of the neck of the femur and the long axis of the femur
Term
normal adult alsberg's angle
Definition
41 degrees
decreases as you get older
Term
angle of declination of the femur - definition
Definition
angle in the transverse plane
formed by the axis of the neck of the femur and the transcondylar axis of the knee with the apex of the angle lateral
Term
angle of declination of the femur - infant
Definition
30 to 60 degrees of internal rotation
Term
angle of declination of the femur - adult
Definition
8 to 12 degrees of internal rotation
Term
femoral anteversion
Definition
normal internal femoral shaft rotation
Term
hip abductors (Orange Gorillas Go To Paris)
Definition
obturator internus
gluteus minimus
gluteus medius
tensor fascia lata
priformis
Term
hip adductors (Golfers Often Quit after Putting Grimly)
Definition
gluteus maximus
obturator externus
quadratus femoris
adductors
pectineus
gracilis
Term
hip flexors (Poor Individuals Really Suffer)
Definition
psoas major
iliacus
rectus femoris
sartorius
Term
hip extensors (Giant Birds Swarm Seattle)
Definition
gluteus maximus
biceps femoris
semimembranosus
semitendinosus
Term
knee flexors (Some Students Believe Gross Sucks)
Definition
semimembranosus
semitendinosus
biceps femoris
gracilis
sartorius
Term
knee extensors (Vegas Virgins Very Rare)
Definition
vastus medialis
vastus lateralis
vastus intermedius
rectus femoris
Term
external hip rotators (Go Out And Get Some Quality Players)
Definition
gluteus maximus
obturators
adductors
gemelli
sartorius
quadratus femoris
piriformis
Term
internal hip rotators
Definition
gluteus medius
gluteus minimus
Term
normal fetal position
Definition
sitting like Buddha
hips and knees are flexed
hips externally rotated
legs and feet internally rotated
Term
rotational changes - bony femur
Definition
external rotation (decrease in angle of inclination)
Term
rotational changes - soft tissue around the hip
Definition
inward rotation
Term
neutral position of the adult hip
Definition
position where there is the same amount of external and internal rotation
Term
calculation NFP (neutral femoral position)
Definition
add the amount of external hip rotation to the amount of internal hip rotation
divide this value by 2
subtract this value from the amount of external hip rotation
perform with the hip both flexed and extended
Term
rotation is due to a twist or torque in the bony femur
Definition
NFP is the same with hip both flexed and extended
Term
rotation is due to a soft tissue contracture (usually in the hip joint)
Definition
NFP is different with the hip flexed and extended
Term
internal NFP
Definition
foot will point inwards
Term
external NFP
Definition
foot will point outwards
Term
normal external hip rotation - infant
Definition
60-90 degrees
Term
normal internal hip rotation - infant
Definition
0-30 degrees
Term
normal external hip rotation - up to 1 year
Definition
50-60 degrees
Term
normal internal hip rotation - up to 1 year
Definition
30 degrees
Term
normal internal and external hip rotation - 4 years to adult
Definition
45 degrees
Term
normal hip rotation test - performed with the hip flexed
Definition
tightens primarily the ischiofemoral ligament
if the ischiofemoral is tight range of internal rotation will decrease
Term
normal hip rotation test - performed with the hip extended
Definition
tightens the iliofemoral, pubocapsular and ligamentum teres
if any of these are tight the range of external rotation will decrease
Term
hip flexion
Definition
tightens the ischiofemoral ligament
limits internal rotation
Term
hip extension
Definition
tightens the iliofemoral and pubofemoral ligaments
limits external rotation
Term
sagittal plane motion of the hip
Definition
hip flexion : 120-130 degrees
hip extension : 0-20 degrees
Term
frontal plane motion of the hip
Definition
hip abduction : 40-45 degrees
hip adduction : 20-25 degrees
Term
medial hamstring tightness
Definition
unable to achieve 160 degrees of knee extension
test for by externally rotating the leg as you extend the knee
causes internal rotation of the leg - toes pointing internally
Term
lateral hamstring tightness
Definition
test for by internally rotating the leg as you extend the knee
causes external rotation of the leg - toes pointing externally
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