The Hip Flashcards
The hip joint is classified as
ball and socket joint
How many planes of motion does the hip joint move in?
3
Sagittal (flexion/extension)
Frontal (abduction/adduction)
transverse (internal/external rotation)
All three axes of hip motion pass through
the center of the femoral head
Os Coxa is made up of
three individual bones
ilium, ischium, pubis
Acetabulum
site where the ilium, ischium, and pubis fuse together
A majority of acetabular development is completed by
the age of 8
Acetabular rim
aka labrum
deepens the acetabulum thereby increasing the stability of the hip joint
The whole of the acetabulum is covered with hyaline cartilage except
the fovea capitis
The pelvic girdle is composed of which three joints
hip (acetabularfemoral)
sacroiliac
public symphysis
Iliac crest contusion
contusion to the site of or an avulsion of the quadratus lumborum and or abdominal muscles from the crest
very painful/disabling if periosteum is involved
With an iliac crest contusion, Patient experiences:
pain when laterally flexing away from the side of injury
pain with abduction of both legs together in side-lying position
Bucket handle fracture
superior and inferior public rami fractures with a separation or fracture of the contralateral SI joint
Sprung Pelvis
separation of the pubic symphysis and both SI joints
Straddle Fracture
bilateral superior pubic rami and ischopubic fractures
Most common areas for pelvis avulsion fractures
ASIS
AIIS
Ischial Tuberosity
Femur
Strongest and longest bone in the body
two thirds of the femoral head is covered in
a smooth layer of cartilage except for the fovea capitis
The fovea capitis is the attachment for what?
ligamentum teres
Inclination angle
angle between the femoral shaft and neck
approximately 125- 130 degrees
The inclination angle in a tall person is
valga
larger
The inclination andle in a short person is
vara
smaller
Femoral Head dislocation
dashboard injury to the knee will cause a posterior hip dislocation if the hip is adducted at the time of injury
the greater trochanter
serves as the insertion site for several muscles that act on the hip joint
the lesser trochanter
located on the posterior-medial junction of the neck and shaft of the femur
created from the pull of the iliopsoas muscle
angle of Anteversion
the angle that the femoral neck makes with the acetabulum
normal angle of anteversion
8-15 degrees
Femoral Anteversion
aka medial femoral torsion
the angle between femoral neck and the transcondylar axis is greater than 15 degrees
What type of gait do you see with femoral anteversion
toe-in gait
Increased medial femoral torsion leads to
OA dysplasia of the acetabulum susceptibility to anterior femoral dislocation knee joint misalignment problems patellar dislocations excessive lumbar lordosis external tibia rotation foot pronation
Femoral retroversion
aka lateral femoral torsion
the angle between the femoral neck and the transcondylar axis is less than 15 degrees
why type of gait fo you see with femoral retroversion
toe out
lateral femoral head torsion may lead to
low back/SI pathologies
internal rotation of the tibia
supination of the feet
Legg-calve-perthes disease
avn of the femoral capital epiphysis before closure of the growth plate