pelvic wall muscles

Question 1

what is the origin of the obturator internus?

Answer 1

internal obturator membrane, forms a tendon that leaves through the sciatic foramen, through the room between ischial spine and tuberosity, and posterior inferior of the hip

Question 2

what is the attachment of the obturator internus?

Answer 2

the medial border of the greater trochanter of the femur

Question 3

what is the function of the obturator internus and piriformis?

Answer 3

lateral rotation of the extended hip joint and abduction of flexed hip (LEAF RB)

Question 4

where does the piriformis originate from?

Answer 4

anterior surface of sacrum between anterior foramina

Question 5

where does the piriformis insert?

Answer 5

medial aspect of the superior greater trochanter

Question 6

what are the innervations of the obturator internus?

Answer 6

L5, S1

Question 7

what are the innervations of the piriformis?

Answer 7

L5, S1, and S2