Muscle, Innervation, Origin and Insertion of Thigh

Question 1

Muscles of Anterior Thigh (8)

Answer 1

Iliacus m.
Psoas major m.
Vastus lateralis m.
Vastus intermedius m
Vastus medialis m.
Rectus femoris m.
Sartorius m.
Articularis genu m.

Question 2

Muscles of Medial Thigh (5)

Answer 2

Adductor magnus m. (both parts)
Adductor longus m.
Adductor brevis m.
Pectineus m.
Gracilis m.

Question 3

Muscle of the Posterior Thigh (3)

Answer 3

Biceps femoris m.
Semitendinosus m.
Semimembranosus m.

Question 4

Muscles of the Gluteal Region (10)

Answer 4

Gluteus maximus m.
Gluteus medius m.
Gluteus minimus m.
Tensor fascia latae m.
Piriformis m.
Superior gemellus m.
Inferior gemellus m.
Quadratus femoris m.
Obturator externus m.
Obturator internus m.

Question 5

Gluteus maximus m.

Answer 5

A: Extend thigh and assist in lateral rotation.
O: Posterior ilium
I: Gluteal tuberosity and IT band.
N: Inferior gluteal n.

Question 6

Gluteus medius m.

Answer 6

A: Abduct and medially rotate thigh.
O: Ilium
I: Greater trochanter
N: Superior gluteal n.

Question 7

Gluteus minimus m.

Answer 7

A: Abduct and medially rotate thigh.
O: Ilium
I: Greater trochanter
N: Superior gluteal n.

Question 8

Tensor fascia latae m.

Answer 8

A: Tense the IT band.
O: Iliac spine and iliac crest
I: IT band to lateral tibial condyle
N: Superior gluteal n.

Question 9

Piriformis m.

Answer 9

A: Laterally rotate extended thigh, abduct flexed thigh, stabilize femoral head.
O: Anterior surface of sacrum.
I: Greater trochanter
N: N. to piriformis m.

Question 10

Superior gemellus m.

Answer 10

A: Laterally rotate extended thigh, abduct flexed thigh, stabilize femoral head.
N: N. to obturator internus m.

Question 11

Inferior gemellus m.

Answer 11

A: Laterally rotate extended thigh, abduct flexed thigh, stabilize femoral head.
N: N. to quadratus femoris m.

Question 12

Quadratus femoris m.

Answer 12

A: Laterally rotate thigh and stabilize femoral head.
N: N. to quadratus femoris m.

Question 13

Obturator externus m.

Answer 13

A: Laterally rotate thigh and stabilize femoral head.
N: Obturator n.

Question 14

Obturator internus m.

Answer 14

A: Laterally rotate extended thigh, abduct flexed thigh, stabilize femoral head.
N: N. to obturator internus m.

Question 15

Psoas major m.

Answer 15

A: Sidebend vertebral column. Flex trunk.
O: T12-L5
I: Lesser trochanter
N: Lumbar plexus L1-3

Question 16

Iliacus m.

Answer 16

A: Flex thigh and stabilize hip joint.
O: Superior iliac fossa, ala of sacrum.
I: Lesser trochanter of femur. Psoas major m..
N: Femoral n.

Question 17

Sartorius m.

Answer 17

A: Flex, abduct, laterally rotate thigh. Flex leg at knee.
O: ASIS
I: Pes anserinus
N: Femoral n.

Question 18

Rectus femoris m.

Answer 18

A: Extend leg at knee. Assist in thigh flexion.
O: Ilium
I: Tibial tuberosity
N: Femoral n.

Question 19

Vastus lateralis m.

Answer 19

A: Extebd leg at the knee.
O: Greater trochanter
I: Tibial tuberosity
N: Femoral n.

Question 20

Vastus intermedius m.

Answer 20

A: Extend leg at knee.
O:Anterior and lateral part of femoral body.
I: Tibial tuberosity
N: Femoral n.

Question 21

Vastus medialis m.

Answer 21

A: Extend leg at knee.
O: Intertrochanteric line, linea aspera.
I: Tibial tuberosity
N: Femoral n.

Question 22

Articularis genu m.

Answer 22

A: Tightens capsule during knee extension.
N: Femoral n.

Question 23

Pectineus m.

Answer 23

A: Adduct and flex thigh.
O: Superior pubic ramus
I: Pectineal line of femur
N: Femoral n.

Question 24

Adductor longus m.

Answer 24

A: Adduct thigh
O: Body of pubis
I: Linea aspera
N: Anterior division of obturator n.

Question 25

Adductor brevis m.

Answer 25

A: Adduct thigh O: Body of pubis I: Pectineal line and proximal linea aspera N: Anterior division of obturator n.

Question 26

Adductor magnus m.

Answer 26

A: Adduct, flex (upper) and extend (lower) thigh. O: Isciopubic ramus and ischial tuberosity I: Gluteal tuberosity, linea aspera, muedial supracondylar line, adductor tubercle. N: Posterior division of obturator n. and Tibial division of sciatic n.

Question 27

Gracilis m.

Answer 27

A: Adduct thigh and assist in medial rotation. Flex leg. O: Body of pubis I: Pes anserinus N: Anterior division of obturator n.

Question 28

Biceps femoris m.

Answer 28

A: Flex leg and laterally rotate leg when flexed. Long head extends thigh. O: Ischial tuberosty and linea aspera. I: Lateral aspect of fibular head. N: Tibial division of sciatic n. (LH) and common fibular division of sciatic n. (SH)

Question 29

Semitendinosus m.

Answer 29

A: Extend thigh. O: Ischial tuberosity. I: Pes anserinus. N: Tibial division of sciatic n.

Question 30

Semimembranosus m.

Answer 30

A: Extend thigh O: Ischial tuberosty I: Medial tibial condyle N: Tibial division of sciatic n.