Sacral Plexus

Question 1

What is the motor distribution of the superior gluteal nerve?

Answer 1

Gluteus medius, gluteus minimus and tensor fascia latae

Question 2

What is the motor distribution of the inferior gluteal nerve?

Answer 2

Gluteus maximus

Question 3

What is the sensory distribution of the perforating cutaneous nerve?

Answer 3

Skin over the Inferior aspect of the buttocks

Question 4

What is the sensory distribution of the posterior cutaneous nerve?

Answer 4

Inferior aspect of buttocks, back of the thigh, posterior part of scrotum/labium majus

Question 5

What is the sensory distribution of the pudendal nerve?

Answer 5

Inferior rectal nerve: skin of anal triangle
Perineal nerve: skin of urogenital triangle, posterior surface of scrotum or labium majus
Dorsal nerve of clitoris or penis: body and glands of clitoris or penis

Question 6

What is the motor distribution of the pudendal nerve?

Answer 6

Inferior rectal nerve: external anal sphincter and levator ani muscles
Perineal nerve: muscles in superficial and deep perineal pouches

Question 7

What are the nerves within the sacral plexus and what are their nerve roots?

Answer 7

Superior gluteal nerve- L4-S1
Inferior gluteal nerve-L5-S2
Sciatic nerve- L4-S3
Posterior cutaneous nerve-S1-S3
Perforating cutaneous nerve-S2-S3
Pudendal nerve- S2-S4