Innervation of Lower Limb Flashcards Preview

BM1 Anatomy: Michealmas > Innervation of Lower Limb > Flashcards

Flashcards in Innervation of Lower Limb Deck (18)
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1
Q

What innervates the superficial gluteal muscles?

A

Gluteal nerve

2
Q

What is iliacus innervated by?

A

femoral nerve

3
Q

What are all medial thigh muscles innervated by?

A

Obturator nerve

4
Q

What are the roots of the lumbar plexus?

A

L2-L5

S1-S3

5
Q

What are the nerves the the lumbar plexus gives rise to?

A
iliohypogastric
ilioinguinal
genitofemoral
lateral femoral cutaneus
obturator 
femoral
6
Q

What is the mnemonic?

A

I (twice) get laid on fridays

7
Q

Where does the lumbar plexus form?

A

Inside psoas major

8
Q

What spinal nerves form the basis of the lumbar plexus?

A

L1-L4

9
Q

How many major peripheral nerves of the lumbar plexus are there?

A

6

10
Q

What does the genitofemoral nerve divide into and where?

A

after leaving psoas major in genital and femoral

11
Q

What nerve in the lumbar plexus has no motor functions

A

lateral cutaneous nerve of the thigh

12
Q

What spinal nerves form the basis of the sacral plexus?

A

S1-S4

13
Q

How many major peripheral nerves are there of the sacral plexus?

A

5

14
Q

What nerves form the five major branches of the sacral plexus?

A

superior gluteal, inferior gluteal, sciatic, posterior femoral cutaneous, pudendal

15
Q

Motor functions of femoral nerve

A

flex hip (pectineus, iliacus, sartorius), extend the knee (quads)

16
Q

Motor functions of obturator nerve

A

all muscles in medial thigh, execpt hamstring and part of adductor magnus, which are innervated by tibial nerve

17
Q

Motor functions of sciatic nerve

A

posterior thigh and hamstring portion of adductor magnus

18
Q

Motor functions of tibial nerve

A

posterior leg