Lumbrosacral plexus

Question 1

Peroneal nerve entrapment sites

Answer 1

1. fibular neck
   - post op
   - trauma
   - stretch (leg crossing)
   - compression
2. fibular tunnel
3. superficial peroneal sensory (tight boots)
4. anterior tarsal tunnel

Question 2

Lumbar plexes entrapment

Answer 2

1. retroperitoneal behind psaos

Question 3

Lower lumbrosacral plexus

Answer 3

L4,5 roots decent into pelvic outlet to join sacral plexus

Question 4

what does superficial peroneal nerve supply

Answer 4

(L4, S2 )
- perenus longus
peroneus brevis
cutaneous branches

Question 5

what does deep peroneal nerve supply

Answer 5

tibialis anterior
EDL
EHL
peroneaus tertius
EDB

Question 6

obturator nerve

Answer 6

adductor magnus
adductor brevis
adductor longus
Gracilis

L2-4 ( comes from)

Question 7

femoral nerve branches

Answer 7

L2,3,4
- rectus femoris
- vastus medialis
- vastus lateralis
- vastus intermedialis

• pectinous
  ileus
• sartorius

Question 8

Tibial nerve is a branch from

Answer 8

Sciatic nerve

Question 9

common perineal nerve is a branch from

Answer 9

sciatic branches ( L4,S3)
biceps femoris (short and long head)
semimembranous
semitendinous
adductor magnus

tibial
common perineal nerve

Question 10

nerve branches of superior gluteal nerve

Answer 10

L4,5,S1

Question 11

branch of posterior cutaneous nerve of thigh

Answer 11

S1-3

Question 12

pudendal nerve

Answer 12

S2-4