The Hip

Question 0

Arthrokinematics

Answer 0

Open kinetic chain- convex femoral head slides on concave acetabulum: rolls in the same direction
Closed kinetic chain- opposite of OKC opposite direction
Capsular pattern- restriction from most to least : internal rotation, flexion, abduction

Question 1

Osteokinematics

Answer 1

Synovial ball-and-socket joint with 3 degrees of freedom
-flexion-extension 0-120 degrees and 0-20 degrees
-medial-lateral (internal/external) rotation 0-45 degrees
-abduction-adduction 0-45 degrees and 0-15 to 20 degrees
Axis of motion goes through center of femoral head

Question 2

ROM the hip

Answer 2

Hip flexion- 0-120 degrees 
Hip extension- 0-20 degrees
Hip abduction-0-45 degrees
Hip adduction- 0-15 to 20 degrees
Hip internal/external rotation- 0-45 degrees