Axon Function (sacral plexus)

Question 1

Nerve to piriformis (S1, S2)

Muscular branches of the plexus

Answer 1

function- sensory, postganglionic sympathetic & motor innervation of the piriformis muscle

Question 2

Nerve to the quadratus femoris (L4-5, S1)

Muscular branches of the plexus

Answer 2

function- sensory, postganglionic sympathetic & motor innervation of the quadratus femoris & inferior gemellus m.

Question 3

Nerve to the obturator internus (L5, S1-2)

Muscular branches of the plexus

Answer 3

unction- sensory, postganglionic sympathetic & motor innervation of the obturator internus & superior gemellus m.

Question 4

Perforating cutaneous (S2-3)

Sensory branches of the plexus

Answer 4

function- sensory, postganglionic sympathetic innervation of the medial part of buttock

Question 5

Posterior cutaneous nerve of thigh (S1-3)

Sensory branches of the plexus

Answer 5

function- sensory, postganglionic sympathetic innervation of buttock and uppermost medial and posterior surfaces of thigh

Question 6

Superior gluteal nerve (L4-5, S1)

Answer 6

function- sensory, postganglionic sympathetic & motor innervation of the gluteus medius, gluteus minimis & tensor fasciae latae m.

Question 7

Inferior gluteal nerve (L5, S1-2)

Answer 7

function- sensory, postganglionic sympathetic & motor innervation of the gluteus maximus m.

Question 8

Muscular branches

Sciatic nerve – Tibial division

Answer 8

function- sensory, postganglionic sympathetic & motor innervation of the semimembranosus, semitendinosus, biceps femoris (long head) & adductor magnus m.

Question 9

Sural n.

Tibial nerve

Answer 9

function- sensory & postganglionic sympathetic innervation of the skin overlying the lateral aspect of the leg & foot

Question 10

Muscular branches

Tibial nerve

Answer 10

function- sensory, postganglionic sympathetic & motor innervation of the gastrocnemius, soleus, plantaris, popliteus, tibialis posterior, flexor digitorum longus & flexor hallucis longus muscles

Question 11

Medial plantar n.

Tibial nerve

Answer 11

function- sensory, postganglionic sympathetic & motor innervation of the medial muscles of the plantar surface of the foot

Question 12

Lateral plantar n.

Tibial nerve

Answer 12

function- sensory, postganglionic sympathetic & motor innervation of the lateral muscles of the plantar surface of the foot

Question 13

Muscular branch to short head of biceps femoris

Sciatic nerve – Fibular (peroneal) division

Answer 13

function- sensory, postganglionic sympathetic & motor innervation of the short head of the biceps femoris

Question 14

Lateral sural n.

Common fibular n.

Answer 14

function- sensory & postganglionic sympathetic innervation of the skin overlying the lateral aspect of the leg

Question 15

Deep fibular (peroneal) n.

Common fibular n.

Answer 15

function- sensory, postganglionic sympathetic & motor innervation of the tibialis anterior, extensor hallucis longus, extensor digitorum longus & fibularis tertius m.

Question 16

Superficial fibular (peroneal) n.

Common fibular n.

Answer 16

function- sensory, postganglionic sympathetic & motor innervation of the fibularis longus & brevis m.