Sacral Plexuses L4-S4

Question 1

Sciatic Nerve (Composed of tibial and common fibular divisions wrapped in a common sheath)

Answer 1

L4–S3

Question 2

Tibial Nerve


Answer 2

L4–S3
MI: Posterior thigh muscles, Posterior leg muscles, Plantar foot muscles
CI: Branches to the heel, and via its medial and lateral plantar nerve branches

Question 3

Common Fibular Nerve (Divides into deep fibular and superficial fibular branches)


Answer 3

L4–S2

MI: Short head of biceps femoris(knee flexor); see also deep fibular and superficial fibular nerves

Question 4

Deep Fibular Nerve


Answer 4

L4–S1
MI: Anterior leg muscles
CI: Dorsal interspace between first and second toes


Question 5

Superficial Fibular Nerve


Answer 5

L5–S2
MI: Lateral leg muscles (foot evertors and plantar flexors) Fibularis longus
Fibularis brevis”
CI: Anteroinferior part of leg; most of dorsum of foot