posterior abdominal wall nerves

Question 1

subcostal nerves

Answer 1

ventral rami T12
external oblique
skin of anterolateral abdominal wall

Question 2

lumbar spinal nerves

Answer 2

L1-L5
deep back muscles (posterior rami)
skin of back (posterior rami)
skin and muscles of inferior trunk and lower limb (anterior rami)

Question 3

lumbar plexus

Answer 3

L1-L4
gives rise to iliohypogastric, ilioinguinal, genitofemoral, lateral femoral cutaneous, femoral, obturator, accessory obturator, and lumbosacral trunk

Question 4

iliohypogastric n

Answer 4

L1

abdominal muscles

Question 5

ilioinguinal n

Answer 5

L1

skin of inguinal and pubic regions

Question 6

genitofemoral n

Answer 6

L1-L2
skin below inguinal ligament
splits into genital and femoral nn

Question 7

lateral femoral cutaneous n

Answer 7

L2-L3

anterolateral skin of thigh

Question 8

femoral n

Answer 8

L2-L4

iliacus, hip flexors, knee extensors

Question 9

obturator n

Answer 9

L2-L4

medial thigh and adductors

Question 10

accessory obturator n

Answer 10

L3-L4

pectineus, hip joint

Question 11

lumbosacral trunk

Answer 11

L4-L5

joins sacral plexus