Sacral + coccygeal plexus

Question 1

Where do the posterior branches of S1-S4 travel through

Answer 1

Posterior sacral foramina

Question 2

Where does the anterior and posterior branches of S5 pass though

Answer 2

Sacral hiatus

Question 3

Which sacral roots have a posterior branch that splits into a medial and lateral branch

Answer 3

S1-S3

Question 4

What muscle is supplied by the medial branch of the posterior rami of S1-S3

Answer 4

Multifidi

Question 5

The lateral branches of the posterior rami of S1-S3 combine with what nerves to supply skin over the buttocks

Answer 5

L5 + S4

Question 6

What nerves unite with the coccygeal plexus

Answer 6

Posterior primary rami of S4 S5