Lower Limb 2

Question 1

What are the muscles in the gluteal region?

Answer 1

gluteus maximus (hip extend, lateral rotation)

gluteus medius (hip abduct, medial rotation)
gluteus minimus

tensor fasciae latae = TFL

piriformis (lateral rotation)
obturator internus
gemelli
quadratus femoris

Question 2

What is the illiotibial band?

Answer 2

extends tendinous band (illiac crest to knee)

Question 3

What is the origin, insertion, action, innervation of the TFL?

Answer 3

O: ASIS
I: IT band
A: flex hip, tense IT band
IN: superior gluteal nerve

Question 4

What is the origin, insertion, action, innervation of the gluteus maximus?

Answer 4

O: ilium, sacrum
I: gluteal tuberosity, IT
A: extend hip, laterally rotate, abduct hip
IN: inferior gluteal nerve

Question 5

What is the origin, insertion, action, innervation of the gluteus medius?

Answer 5

O: lateral surface of ilium
I: greater trochanter
A: abduct, medially rotate hip
IN: superior gluteal nerve

Question 6

What is the origin, insertion, action, innervation of the gluteus minimus?

Answer 6

O: external surface of ilium
I: greater trochanter
A: abduct, medially rotate hip
IN: superior gluteal nerve

Question 7

What is the origin, insertion, action, innervation of the piriformis?

Answer 7

O: sacrum
I: greater trochanter
A: abduct hip, laterally rotate hip
IN: S1/S2

Question 8

What is the origin, insertion, action, innervation of the obturator internus?

Answer 8

O: obturator membrane
I: greater trochanter
A: abduct hip, laterally rotate hip
IN: obturator nerve

Question 9

What is the origin, insertion, action, innervation of the gemelli?

Answer 9

O: ischial spine/tuberosity
I: greater trochanter
A: abduct hip, laterally rotate hip
IN: obturator nerve

Question 10

What are the muscles of the posterior compartment of thigh?

Answer 10

biceps femoris (short/long head)
semitendinosus
semimembranous

Question 11

What is the origin, insertion, action, innervation of the biceps femoris?

Answer 11

O: (long) ischial tuberosity (short) distal femur
I: head fibula
A: extend hip (long), flex knee (both), laterally rotate
IN: sciatic nerve
- tibial (long), fibular (short)

Question 12

What is the origin, insertion, action, innervation of the semimembranousus?

Answer 12

O: ischial tuberosity
I: medial condyle of tibia
A: extend hip, flex knee, medially rotate
IN: sciatic nerve (tibial)

Question 13

What is the origin, insertion, action, innervation of the semitendinosus?

Answer 13

O: ischial tuberosity
I: medial aspect tibia
A: extend hip, flex knee, medially rotate
IN: sciatic nerve (tibial)

Question 14

What is the pez anserinus?

Answer 14

sartorius, semitendinosus, gracilis
- all insert medial aspect of tibia