EEI 10/31 Hip Biomechanics II

Question 1

femur on pelvis arthrokinematics

Answer 1

roll and glide in opposite directions

BUT glide is very limited (less translation)

Question 2

muscle function of the hip

Answer 2

• in sagittal plane (flexion/extension)
• in frontal plane (adductor/abductor)
• in transverse plane (IR/ER)

Question 3

hip flexors

Answer 3

anterior to sagittal plane axis
Primary: 
-Iliopsoas: off of lumbar spine and connects with iliacis (PRIMARY) 
-Sartorius 
-Rectus femoris: crosses hip
-Tensor fasciae latae
-Adductor longus
-Pectineus

Question 4

pelvic on femoral hip flexion

Answer 4

anterior pelvic tilt

Question 5

force couple of pelvic on femoral hip flexion

Answer 5

hip flexors and low back extensors + core muscles combat pull of hip flexors ot avoid pelvic tilt

Question 6

hip extensors

Answer 6

posterior to sagittal plane axis

Primary Muscles: