Head of femur that fits into the acetabulum of the

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Head of femur that fits into the acetabulum of the pelvis A lot of bony stability Femur and acetabulum – very congruent  Therefore a lot of stability Won’t come out as easy What holds this joint together? Ilio-femoral ligament (upside down Y)
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o Attaches onto iliac and intertrochantic line on femur (across the front of the femur) o Limits extension at the hip o Limits posterior tilt Coming off pubis side of pelvis o Runs to femur – limits abduction of the hip Don’t usually look at adduction (since other leg comes in the way) Ischiofemoral (starts at ischial, and spirals over the front of the femur) – Limits medial rotation of the hip  Internal rotation stretches it  External rotation eases it o Wringing vs unwringing a towel Unique Features of Hip Femoral shaft is angled medially with respect to the neck Angle of inclination – Bisects neck of femur and then bisects shaft of femur o Around 125 degrees Influences the knee Tells us where the bottom of the knee is relative to the top o If smaller than 125  Influences knee position Femur points more medially  easier to have a valgus knee o If larger than 125 – Easier to have a varus position of th knee Femoral Torsion Shaft of femur spirals medially (top  bottom) Right of screen is lateral – left is media Head of femur doesn’t sit directly into socket Neck of femur points posteriorly Greater trochanter… A line that connected condyles A line that bisects the head of femur o Interested in angle between the two o Angle of Antiversion o Angle of Femoral Torsion Femur looks like it twists on the way down to the knee Top of femur seems to be pointing laterally Bottom of femur (knee) points forward (anteriorly) How much “twisting” happens Very small but there Larger or smaller angle of torsion will determine where the knee is @ o If angle of torsion is bigger – knee will be more medial o If angle of torsion is smaller – pointing more laterally – knee will be more lateral
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  • Fall '18
  • Krista Madsen
  • Medial collateral ligament

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