Lateral Rotator Muscles

Question 1

Piriformis

Answer 1

Pencil shaped muscle deep to Gluteus Maximus

Proximal Attch: anterior sacrum –> through greater sciatic notch

Distal Attch: posteromedial aspect of greater trochanter

Action: hip lateral rotation
hip abduction (when hip flexed to 60°)
hip medial rotation (when hip flexed > 60°)

Fiber direction: inferolateral

Palpation/ Activate:  
Partner on Stomach
Locate PSIS (on opposite side)
Locate Greater Trochanter 
Draw imaginary line (lateral to sacrum)
Ask partner to rotate hip

Question 2

Quadratus Femoris

Answer 2

Short hip lateral rotator muscle

Proximal Attch: lateral ischial tuberosity

Distal Attch: intertrochanteric crest

Action: hip lateral rotation

Fiber direction: horizontal

Palpation/ Activate: 
Partner on stomach 
Locate Greater Trochanter
Locate Ischial tuberosity
Place fingers b/w these landmarks

Activate > Bend knee > laterally rotate leg > palpate horizontal fibers