Lumbar and Sacral Plexus

Question 1

Supplies skin of the anterior abdominal wall

Answer 1

Iliohypogastric

Question 2

Supplies skin of the groin and scrotum/ labia majora

Answer 2

Ilioinguinal

Question 3

Supplies the anterior surface of the psoas

Answer 3

Genitofemoral

Question 4

Division of the genitofemoral that supplies the cremaster muscle

Answer 4

Genital branch

Question 5

Division of the genitofemoral that supplies the skin on the thigh

Answer 5

femoral branch

Question 6

Supplies the skin over the lateral surface of the thigh

Answer 6

Lateral femoral cutaneous

Question 7

Largest branch of the lumbar plexus

Answer 7

Femoral nerve

Question 8

Supplies the muscles on the anterior thigh and skin on the antero medial aspect

Answer 8

Femoral nerve

Question 9

Supplies the medial thigh muscles and skin in the medial aspect

Answer 9

Obturator nerve

Question 10

Sacral plexus is formed by:

Answer 10

Anterior rami of L4-L5 and S1-S4

Question 11

Branch of the sacral plexus that supplies the gluteus medius and minimus

Answer 11

Superior gluteal

Question 12

Branch of the sacral plexus that supplies the gluteus maximus

Answer 12

Inferior gluteal

Question 13

Branch of the sacral plexus that supplies the perineum

Answer 13

Pudendal (S2, S3, S4)

Question 14

Branch of the sacral plexus that supplies the skin on the lower medial part of the buttock

Answer 14

Perforating cutaneous nerve

Question 15

Supplies skin on the lower medial part of the buttock

Answer 15

Perforating cutaneous nere

Question 16

Branch of lumbar plexus that arises from the anterior aspect of the psoas

Answer 16

Genitofemoral

Question 17

Lumbar plexus branch that arises from the medial border of psoas

Answer 17

Obturator nere