Lumbar Plexus overview

Question 1

What forms the lumbar plexus?

Answer 1

Anterior primary ram of L1-L3 and part of L4

Question 2

The lumbar plexus also receives contribution form T12 via a communication from which nerve?

Answer 2

L1, via subcostal nerve

Question 3

Muscular branches from the anterior rami supply which muscles?

Answer 3

quadratus lumborum
psoas major
psoas minor

Question 4

L1 muscular branch will supply which muscles?

Answer 4

Quadratus lumborum

Psoas minor

Question 5

L2 muscular branch will supply which muscles?

Answer 5

Quadratus lumborum

Psoas major and minor

Question 6

L3 and L4 muscular branch will supply which muscles?

Answer 6

Quadratus lumborum

Psoas major

Question 7

Which muscular branches of the lumbar nerves supply quadratus lumborum?

Answer 7

L1-L4

Question 8

Which muscular branches of the lumbar nerves supply psoas major?

Answer 8

L2-L4

Question 9

Which muscular branches of the lumbar nerves supply psoas minor?

Answer 9

L1 and L2

Question 10

T12 and L1 of the lumbar plexus contribute to which nerves?

Answer 10

iliohypogastric nerve

ilioinguinal nerve

Question 11

L1 and L2 of the lumbar plexus contribute to which nerve?

Answer 11

genitofemoral nerve

Question 12

L2 and L3 of the lumbar plexus contribute to which nerve?

Answer 12

Lateral cutaneous nerve of the thigh

Question 13

L2, L3, L4 of the lumbar plexus contribute to which nerves?

Answer 13

Femoral nerve

obturator nerve

Question 14

L4 and L5 contribute to what?

Answer 14

lumbosacral trunk