Nerves of the Lower Limb

Question 1

What is a nerve plexus?

Answer 1

Intermingling of nerve processes from VENTRAL rami of different spinal cord levels.

Question 2

What are the two plexuses associated with the lower limb?

Answer 2

Lumbar and sacral plexuses

Question 3

What are the spinal levels associated with the lumbar plexus?

Answer 3

T12-L4

Question 4

What nerves come from the lumbar plexus?

Answer 4

Femoral and obturator nerves (L2-4)

Question 5

What spinal cord levels contribute to the femoral nerve?

Answer 5

L2-4

Question 6

What spinal cord levels contribute to the obturator nerve?

Answer 6

L2-4

Question 7

Where does the obturator nerve run?

Answer 7

Medial to psoas major m., through obturator foramen, superficial to adductor brevis

Question 8

What spinal cord levels contribute to the sacral plexus?

Answer 8

L4-S4

Question 9

What are the nerves of the sacral plexus?

Answer 9

Superior gluteal n., inferior gluteal n., sciatic n., tibial n., common fibular n.

Question 10

Spinal cord levels for superior gluteal nerve

Answer 10

L4-S1

Question 11

Spinal cord levels for inferior gluteal n.

Answer 11

L5-S2

Question 12

Spinal cord levels for sciatic nerve

Answer 12

L4-S3

Question 13

Spinal cord levels for tibial nerve

Answer 13

L4-S3

Question 14

Spinal cord levels for common fibular nerve

Answer 14

L4-S2

Question 15

What ligaments close the greater sciatic notch?

Answer 15

Sacrospinal and sacrotuberous ligaments

Question 16

What goes through the greater sciatic foramen?

Answer 16

Superior gluteal n., inferior gluteal n., sciatic n.

Question 17

Into what nerves does the sciatic nerve divide?

Answer 17

Tibial and common fibular nn.

Question 18

Into what nerves does the tibial nerve divide?

Answer 18

Medial and lateral plantar nn.

Question 19

Into what nerves does the common fibular nerve divide?

Answer 19

Deep and superficial fibular nn.

Question 20

Where is the superficial fibular nerve?

Answer 20

Between the fibularis longus and brevis mm., continues onto dorsum of the foot

Question 21

Does the deep fibular nerve continue onto the dorsum of the foot?

Answer 21

Yes