Lumbosacral Plexus

Question 1

Femoral Nerve Supplies?

Answer 1

anterior thigh

Question 2

Obturator Nerve supplies?

Answer 2

medial thigh

Question 3

Sciatic Nerve supplies?

Answer 3

posterior thigh

Question 4

What spinal nerves form Lumbar plexus?

Answer 4

L1-L4

Question 5

What are the nerves of the lumbar plexus that you need to know?

Answer 5

Lateral cutaneous nerve
Femoral nerve
Obturator nerve
lumbosacral trunk

Question 6

Spinal nerves of lateral cutaneous nerve?

Answer 6

L2-L3

Question 7

Spinal nerves of femoral nerve?

Answer 7

L2-L4

Question 8

Spinal nerves of obturator nerve?

Answer 8

L2-L4

Question 9

Spinal nerves of lumbosacral trunk?

Answer 9

L4-L5, joins sacral plexus

Question 10

Innervation of Obturator nerve?

Answer 10

Motor to all muscles in medial thigh and obturator externus

Sensory to skin over upper medial aspect of thigh

Question 11

Innervation of Femoral nerve?

Answer 11

Motor to all muscles in anterior thigh
Motor to iliacus and pectineus
Sensory to skin of anterior thigh, anteromedial knee, medial side of leg and medial side of foot

Question 12

Innervation of Lateral cutaneous nerve?

Answer 12

sensory innervation to skin on anterior and lateral aspect of thigh

Question 13

What are the nerves of the sacral plexus that you need to know?

Answer 13

Tibial Nerve
Superior gluteal nerve
Inferior gluteal nerve
Common fibular nerve

Question 14

What spinal nerves form Sacral plexus and location?

Answer 14

L4-S4
Forms on posterior wall of pelvis
Most nerves exit via greater sciatic foramen

Question 15

Spinal nerves of Tibial nerve?

Answer 15

Anterior división of sciatic nerve

L4-S3

Question 16

Spinal nerves of Superior gluteal nerve?

Answer 16

L4-S1

Question 17

Spinal nerves of Inferior gluteal nerve?

Answer 17

L5-S2

Question 18

Spinal nerves of common fibular nerve?

Answer 18

Posterior division of sciatic nerve

L4-S2

Question 19

innervation of superior gluteal nerve?

Answer 19

Gluteus medius & minimus

tensor fasciae latae muscles

Question 20

Innervation of inferior gluteal nerve?

Answer 20

gluteus maximus muscle

Question 21

Sciatic nerve composed of what 2 nerves and where do they split?

Answer 21

Tibial nerve (anterior)
Common fibular nerve (posterior)
Sciatic nerve splits near popliteal fossa

Question 22

Sciatic nerve supplies?

Answer 22

Posterior thigh muscles, all leg and foot muscles, skin of most of leg and foot

Question 23

Innervation of Tibial Nerve?

Answer 23

Motor to posterior thigh muscles, posterior leg muscles, muscles of sole of foot
Sensory to skin on plantar aspect of foot

Question 24

Tibial nerve splits into?

Answer 24

Medial plantar nerve

Lateral plantar nerve

Question 25

What are the two cutaneous branches of Tibial nerve?

Answer 25

Medial sural cutaneous nerve

Sural Nerve

Question 26

Innervation of Common fibular nerve?

Answer 26

Motor to muscles of lateral leg (evertors) via superficial fibular branch
Motor to muscles in anterior of leg and forum of foot via deep fibular branch
Sensory to skin on lateral aspect of inferior half of leg and between hallux and 2nd toe

Question 27

Common fibular nerve splits into?

Answer 27

Superficial fibular nerve

Deep fibular nerve