Innervations

Question 1

Pectineus

Answer 1

Femoral N (L2,3); may receive a branch from the obturator N

Question 2

Iliopsoas

Answer 2

Anterior rami of lumbar nerves

Question 3

Psoas major

Answer 3

Anterior rami of lumbar nerves (L1,L2,L3)

Question 4

Iliacus

Answer 4

Femoral N (L2,3)

Question 5

Psoas minor

Answer 5

Anterior rami of lumbar nerves (L1, L2)

Question 6

Sartorius

Answer 6

Femoral N (L2,L3)

Question 7

Which muscles are innervated by the Femoral N

Answer 7

Pectineus
Iliacus
Sartorius
Quadriceps Femoris

“Paris is so quaint”

Question 8

Which muscles are innervated by anterior rami of lumbar nerves

Answer 8

Psoas major and minor

Question 9

Quadriceps femoris

Answer 9

Femoral N (L2-4)

Question 10

The adducotrs of the thigh are innervated by ___

Answer 10

Obturator N

Question 11

Adductor longus and brevis

Answer 11

Obturator N and branch of anterior division (L2-4)

Question 12

Adductor magnus adductor part

Answer 12

Obturator N (L2-4) and branches of posterior division

Question 13

Adductor magnus hamstring part

Answer 13

Tibial part of sciatic N (L4)

Question 14

Gracilis

Answer 14

Obturator N (L2,L3)

Question 15

Obturator externus

Answer 15

Obturator N (L3,L4)

Question 16

Gluteus maximus

Answer 16

Inferior gluteal N (L5-S2)

Question 17

Gluteus medius, minimus, and tensor fascia lata

Answer 17

Superior gluteal N (L5, S1)

Question 18

Piriformis

Answer 18

Branches of anterior rami of S1 and S2

Question 19

Obturator internus

Answer 19

N. to obturator internus (L5,S1)

Question 20

Superior gemelli

Answer 20

N. to obturator internus (L5,S1)

Question 21

Inferior gemelli

Answer 21

N. quadratus femoris (L5,S1)

Question 22

Qudratus femoris and inferior gemelli

Answer 22

N. to quadratus femoris (L5,S1)

Question 23

Obturator internus and superior gemelli

Answer 23

N. to obturator internus (L5, S1)

Question 24

Where do the cluneal nerves come from?

Answer 24

Mostly posterior rami of spinal nerves. Inferior cluneal nerves comes from anterior rami of spinal nerves.

Question 25

Superior cluneal N origin and distribution

Answer 25

Lateral cutaneous branches of posterior rami of L1-3. Supplies butt skin as high up as tubercle of iliac crest

Question 26

Middle cluneal N origin and distribution

Answer 26

Lateral cutaneous branches of posterior rami of S1-3. Supplies butt skin over sacrum and adjacent area of buttocks.

Question 27

Inferior gluteal N origin and distribution

Answer 27

Posterior cutaneous N of thigh (anterior rami of S2-3). Supplies skin to inferior half of butt as far as greater trochanter.

Question 28

Sciatic N origin

Answer 28

Sacral plexus (anterior and posterior divisions of anterior rami of L4-S3 spinal nerves)

Question 29

Posterior cutaneous N of thigh origin

Answer 29

Sacral plexus (anterior and posterior divisions of anterior rami of S1-3 spinal nerves)

Question 30

Posterior cutaneous N of thigh distribution

Answer 30

• Inferior half of butt skin via inferior cluneal nerves
• Posterior thigh and popliteal fossa skin
• Lateral perinuem and upper medial thigh skin

Question 31

Superior gluteal N (3!)

Answer 31

Gluteus medius, minimus, tensor fascia lata

Question 32

Inferior gluteal N

Answer 32

Gluteus maximus

Question 33

Nerve to quadratus femoris

Answer 33

Innervates hip joint, inferior gemellus, and quadratus femoris

Question 34

Pudendal N

Answer 34

Principal nerve to perienum

Question 35

Nerve to obturator internus

Answer 35

Superior gemellus and obturator internus