SCIATIC NERVE

Question 1

FORMTION

Answer 1

From joining of deep peroneal nerve(L4- S3) and common peroneal nerve(L4-S2) in the pelvic cavity

Question 2

COURSE

Answer 2

It runs through the greater sciatic notch and then beneath the piriformis muscle. It runs vertically downwards then enters the gluteal region and passes below the gluteus maximus. It enters the back of the thigh and runs below the long head of biceps femoris. Finally divides into two terminal branches in the superior angle of the popliteal fossa.

Question 3

BRANCHES

Answer 3

Common peroneal nerve- REFER NOTES IN (DETAILED ANSWER)

deep peroneal nerve-

Question 4

RELATIONS

Answer 4

Superficial relations-1. Gluteus maximus
2. Long head of biceps femoris
Deep relations- 1. superior gemellus
2. Obturator internus
3. Inferior gemellus
4. Quadratus femoris

Question 5

APPLIED

Answer 5

PIRIFORMIS SYNDROME
SCIATICA
SLEEPING FOOT
POSTERIOR DISLOCATION OF HIP JOINT