Sacral plexus

Question 1

Branches of Sacral plexus (L4, S1, S2, S3)

Answer 1

Superior gluteal nerve (L4, L5, S1)

Inferior gluteal nerve (L5, S1, S2)

Sciatic nerve (L4,L5, S1, S2, S3)

Question 2

Superior gluteal nerve (L4, L5, S1)

Answer 2

Courses over the superior border of the piriformis muscle

innervates- TFL, gluteus medius and gluteus minimus

Question 3

Inferior gluteal nerve (L5, S1, S2)

Answer 3

Travels inferior (underneath) the piriformis muscle

Innervates- gluteus maximus

Question 4

Sciatic nerve (L4, S1, S2, S3)

Answer 4

Runs underneath the piriformis muscle, this is how piriformis syndrome can be caused

Innervates- hamstrings and the ischial fibres of adductor Magnus