Nerve & Action

Question 1

Rectus Femoris Act & Nerve

Answer 1

Extend the knee, flex the hip. Femoral nerve.

Question 2

Vastus Medialis Act & Nerve

Answer 2

Extend the knee. Femoral nerve.

Question 3

Vastus Lateralis Act & Nerve

Answer 3

Extend the knee. Femoral nerve.

Question 4

Vastus lateralis Act & Nerve

Answer 4

Extend the knee. Femoral nerve.

Question 5

Biceps femoris Actions

Answer 5

Flex the knee (tibiofemoral joint), laterally rotate the flex knee (t/f joint), long head: extend the hip (coxal joint) assist to laterally rotate hip (coxal joint), tilt pelvis posteriorly.

Question 6

Biceps femoris Innervation

Answer 6

Long head: sciatic (tibial branch) Short head: sciatic (peroneal branch).

Question 7

Semitendinosus Actions

Answer 7

Flex the knee (tibiofemoral joint). Medially rotate the flexed knee (t/f joint). Extend the hip (coxal joint). Assist to medially rotate the hip (coxal joint). Tilt the pelvis posteriorly.

Question 8

Semitendinosus Innervation

Answer 8

Sciatic (tibial branch)

Question 9

Semimembranosus Actions

Answer 9

Flex the knee (t/f joint). Medially rotate the flexed knee (t/f joint). Extend the hip (coxal joint). Assist to medially rotate the hip (coxal joint). Tilt pelvis posteriorly.

Question 10

Semimembranosus Innervation

Answer 10

Sciatic nerve (tibial branch)

Question 11

Gluteus Maximus Actions

Answer 11

All fibers: Extend the hip (coxal joint). Laterally rotate the hip (coxal joint). Abduct the hip (coxal joint). Lower fibers: Adduct the hip.

Question 12

Glute Max Innervation

Answer 12

Inferior gluteal nerve.

Question 13

Glute Med Actions

Answer 13

All Fibers: Abduct the hip (coxal joint). Anterior Fibers: Flex the hip, medially rotate the hip. Posterior Fibers: Extend the hip, laterally rotate the hip.

Question 14

Glute Med & Glute Min Innervation

Answer 14

Superior gluteal nerve

Question 15

Gluteus Minimus Actions

Answer 15

Abduct the hip, medially rotate the hip, flex the hip.

Question 16

Adductor Magnus A & N

Answer 16

Adduct the hip, medially rotate the hip, assist to flex the hip. Posterior fibers: Extend the hip. Obturator nerve and Sciatic nerve.

Question 17

Adductor Longus A & N

Answer 17

Adduct the hip, medially rotate the hip, assist to flex the hip. Obturator nerve.

Question 18

Adductor Brevis A & N

Answer 18

Adduct the hip, medially rotate the hip, assist to flex the hip. Obturator Nerve.

Question 19

Pectineus A & N

Answer 19

Adduct the hip, medially rotate the hip, assist the flex the hip. Femoral and Obturator nerve.

Question 20

Gracilis A & N

Answer 20

Adduct the hip, medially rotate the hip, flex the knee, medially rotate the flexed knee. Obturator nerve.

Question 21

Tensor Fasciae Latae A & N

Answer 21

Flex the hip, medially rotate the hip, abduct the hip. Superior gluteal nerve.

Question 22

Sartorius A & N

Answer 22

Flex the hip, laterally rotate the hip, abduct the hip, flex the knee (pes anserinus t/f joint), medially rotate the flexed knee. Femoral nerve

Question 23

Piriformis A & N

Answer 23

Laterally rotate the hip, abduct hip when flexed. Sacral plexus.

Question 24

Quadratus femoris A & N

Answer 24

Laterally rotate the hip. Sacral plexus.

Question 25

Obturator Internus A & N

Answer 25

Laterally rotate hip. Sacral plexus.

Question 26

Obturator Externus A & N

Answer 26

Obturator nerve.

Question 27

Gemellus Superior/Inferior A & N

Answer 27

Laterally rotate the hip. Sacral plexus.

Question 28

Psoas Major Actions

Answer 28

Origin fixed: Flex the hip, may laterally rotate hip. Insertion fixed: FLex trunk toward the thigh, tilt pelvis anteriorly. Unilaterally: Assist to laterally flex L/S.

Question 29

Iliacus Actions

Answer 29

Origin fixed: Flex the hip, may laterally rotate hip. Insertion fixed: Flex the trunk toward the thigh, tilt pelvis anteriorly.

Question 30

Iliacus Innervation

Answer 30

Femoral nerve

Question 31

Psoas Major Innervation

Answer 31

Lumbar plexus.

Question 32

Psoas Minor A & N

Answer 32

Assist to create lordotic curve in the L/S, tilt pelvis anteriorly. Lumbar plexus.