Hip Biomechanics

Question 1

Describe the C, CP, CPP, RP and DoF/EF of the hip joint.

Answer 1

i) simple, synovial, unmodified ovoid
ii) flex > ABD > IR
iii) extension, ABD and IR
iv) 30 deg flex, ABD and ER
v) flex/ ext soft tissue, ER/IR soft tissue, ABD/ADD soft tissue

Question 2

What is the capsular pattern of the hip in early OA?

Answer 2

i) limited extension, IR, both F/ADD and ext/ABD quadrants

Question 3

Describe the arthrokinematics of the hip joint.

Answer 3

i) ABD: inferior glide
ii) ADD: superior glide
iii) ER: ant glide
iv) IR: post glide