Thigh Muscles (Anterior Femoral, Medial Femoral, Posterior Femoral)

Question 1

Iliacus attachment

Answer 1

FROM:
*iliac fossa
*iliac crest
*sacral ala
*sacroiliac ligaments

TO
*lesser trochanter of femur

Question 2

Iliacus action

Answer 2

Flexes and stabilizes hip joint

Question 3

Iliacus innervation

Answer 3

Femoral nerve (L2-4)

Question 4

Psoas major attachment

Answer 4

FROM:
*anterior transverse processes
*vertebral bodies & discs (T12-L5)

TO:
*lesser trochanter of femur

Question 5

Psoas major action

Answer 5

Flexes and stabilizes hip joint

Question 6

Psoas major innervation

Answer 6

Ventral rami L1-4 (from lumbar plexus)

Question 7

Rectus femoris attachment

Answer 7

FROM:
*anterior inferior iliac spine
*groove superior to the acetabulum

TO:
*base of the patella

Question 8

Rectus femoris action

Answer 8

Flexes hip and extends knee

Question 9

Rectus femoris innervation

Answer 9

Femoral nerve (L2-4)

Question 10

Sartorius attachment

Answer 10

FROM:
*anterior superior iliac spine

TO:
*medial aspect of the proximal tibia

Question 11

Sartorius action

Answer 11

*flexes, abducts & laterally rotates hip
*flexes & assists medial rotation of
the knee

Question 12

Sartorius innervation

Answer 12

Femoral nerve (L2-3)

Question 13

Tensor fascia latae attachment

Answer 13

FROM:
*anterior superior iliac spine
*external lip iliac crest

TO:
*iliotibial tract

Question 14

Tensor fascia latae action

Answer 14

abducts, flexes & medially rotates hip, and assists in maintaining knee extension

Question 15

Tensor fascia latae innervation

Answer 15

Superior gluteal nerve (L4-S1)

Question 16

Vastus intermedius attachment

Answer 16

FROM:*
anterior aspect of the proximal 2/3rds of the femoral shaft

TO:
*the lateral border of the patella

Question 17

Vastus intermedius action

Answer 17

extends knee

Question 18

Vastus intermedius innervation

Answer 18

femoral nerve (L2-4)

Question 19

Vastus lateralis attachment

Answer 19

FROM:
*intertrochanteric line
*greater trochanter
*gluteal tuberosity
*linea aspera

TO:
*base & lateral border of the patella

Question 20

Vastus lateralis action

Answer 20

extends knee

Question 21

Vastus lateralis innervation

Answer 21

femoral nerve (L2-4)

Question 22

Vastus medialis attachment

Answer 22

FROM:
*intertrochanteric line
*spiral line
*linea aspera
*medial supracondylar line

TO:
*base & medial border of the patella

Question 23

Vastus medialis action

Answer 23

extends leg

Question 24

Vastus medialis innervation

Answer 24

Femoral nerve (L2-4)

Question 25

Articularis genu attachment

Answer 25

FROM: *distal anterior shaft of femur TO: *proximal portion of synovial membrane of knee joint

Question 26

Articularis genu action

Answer 26

Pulls articular capsule proximally

Question 27

Articularis genu innervation

Answer 27

Femoral nerve (L2-4)

Question 28

Adductor brevis attachment

Answer 28

FROM: *inferior pubic ramus TO: *distal 2/3 pectineal line *medial lip linea aspera

Question 29

Adductor brevis action

Answer 29

Adducts and flexes hip

Question 30

Adductor brevis innervation

Answer 30

Obturator nerve (L2-4)

Question 31

Adductor longus attachment

Answer 31

FROM: *pubic crest TO: *medial lip linea aspera

Question 32

Adductor longus action

Answer 32

Adducts, medially rotates, and flexes hip

Question 33

Adductor longus innervation

Answer 33

Obturator nerve (L2-4)

Question 34

Adductor magnus attachment

Answer 34

FROM: *inferior pubic ramus *ischial ramus & tuberosity TO: *gluteal tuberosity and linea aspera (adductor part) *medial supracondylar ridge & adductor tubercle of the femur (hamstring part)

Question 35

Adductor magnus action

Answer 35

adducts, flexes (adductor part) & extends (hamstring part) hip

Question 36

Adductor magnus innervation

Answer 36

*obturator nerve (adductor part, L2-4) *tibial division of the sciatic nerve (hamstring part, L4-S1)

Question 37

Gracilis attachment

Answer 37

FROM: *body of the pubis *inferior pubic ramus TO: *medial surface of tibia *distal to condyle, proximal to insertion of semitendinosus, lateral to insertion of sartorius

Question 38

Gracilis action

Answer 38

flexes & medially rotates the knee, and adducts hip

Question 39

Gracilis innervation

Answer 39

Obturator nerve (L2-4)

Question 40

Pectineus attachment

Answer 40

FROM: *superior pubic ramus TO: *femur between the lesser trochanter & linea aspera (pectineal line)

Question 41

Pectineus action

Answer 41

Adducts, flexes hip

Question 42

Pectineus innervation

Answer 42

Femoral and obturator nerve (L2-4)

Question 43

Biceps femoris attachment

Answer 43

FROM: *ischial tuberosity & sacrotuberous lig. (long head) *lateral lip of linea aspera & lateral supracondylar line (short head) TO: *lateral side of fibular head

Question 44

Biceps femoris action

Answer 44

flexes & laterally rotates the knee (both heads) & extends hip (long head only)

Question 45

Biceps femoris innervation

Answer 45

*tibial division of sciatic (long head; L5-S3) *fibular division of the sciatic nerve (short head; L5-S2)

Question 46

Semimembranosus attachment

Answer 46

FROM: *ischial tuberosity TO: *posterior aspect of the medial tibial condyle

Question 47

Semimembranosus innervation

Answer 47

Tibial division of the sciatic nerve (L4-S2)

Question 48

Semimembranosus action

Answer 48

extends hip, and flexes & medially rotates knee

Question 49

Semitendinosus attachment

Answer 49

FROM: *ischial tuberosity TO: *proximal, medial tibia

Question 50

Semitendinosus action

Answer 50

extends hip, and flexes & medially rotates knee

Question 51

Semitendinosus innervation

Answer 51

Tibial division of the sciatic nerve (L4-S2)

Question 52

Obturator externus - Attachments

Answer 52

FROM: *rami of the pubis and ischium *external surface obturator membrane TO: *trochanteric fossa

Question 53

Obturator externus - Actions

Answer 53

laterally rotates hip

Question 54

Obturator externus - Innervation

Answer 54

Obturator nerve (L3-4)