Sciatic Nerve

Question 1

what is the largest nerve in the body?

Answer 1

sciatic nerve

Question 2

what nerve roots form the sciatic nerve?

Answer 2

L4-S3

Question 3

where is the sciatic nerve derived?

Answer 3

lumbosacral plexus

Question 4

describe the anatomical course of the sciatic nerve?

Answer 4

• lumbosacral plexus
• leaves pelvis through GSF
• emerges inferiorly to piriformis muscle
• moves through gluteral region
• enters posterior thigh by passing dee to long head of biceps femoris
• apex of popliteal fossa - terminates

Question 5

how does the sciatic nerve terminate?

Answer 5

at the apex of the popliteal fossa - bifurcates into tibial and common fibular nerves

Question 6

the sciatic nerve can be described as two nerves bundled together - what are they?

Answer 6

tibial and common fibular nerve - 12% of people they separate as they leave the pelvis

Question 7

Label the sciatic nerve

Answer 7