Lower Extremities - Nerves

Front 1

Lumbar plexus

Back 1

The network of anterior rami from the L1 to L5 level that are responsible in innervating the lower extremities.

Front 2

The lumbar plexus contains innervation to which muscular branches?

Back 2

"Iliacus, Quadratus lumborum, and Psoas.

Front 3

Iliohypogastric n. of the lumbar plexus (L1)

Back 3

function- sensory & postganglionic sympathetic innervation of skin overlying lower anterior abdominal wall; sensory, postganglionic sympathetic & motor (lmn) innervation of muscles of the anterior abdominal wall

Front 4

Ilioinguinal n. of the lumbar plexus (L1)

Back 4

function- sensory & postganglionic sympathetic innervation of skin overlying proximomedial thigh, root of the penis & scrotum or mons pubis & labium majorum; sensory, postganglionic sympathetic & motor (lmn) innervation of muscles of the anterior abdominal wall

Front 5

Lateral femoral cutaneous n. of the lumbar plexus

Back 5

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

Front 6

Femoral n. of the lumbar plexus (L2-4)

Back 6

The largest branch of the lumbar plexus, originates from the ventral rami of the second, third, and fourth lumbar nerves.

Front 7

Saphenous n. (origin: femoral)

Back 7

"The largest cutaneous of the femoral nerve.

Front 8

Muscular branches of the femoral n.

Back 8

"

Front 9

Obturator nerve (Lumbar plexus)

Back 9

Originates from ventral divisions of the 2nd 3rd and 4th lumbar nerves. Enters the upper thigh by way of the Obturator canal.

Front 10

Muscular branches of the Obturator n.

Back 10

function- sensory, postganglionic sympathetic & motor (lmn); innervation of the gracilis, adductor brevis, adductor longus, adductor magnus & obturator externus muscles.

Front 11

Accessory obturator branch of the Obturator nerve.

Back 11

function- sensory, postganglionic sympathetic & motor (lmn); innervation of the pectineus

Front 12

Sacral plexus

Back 12

the network of anterior rami from the L4-5 to S4 level that are responsible for innervating the lower extremities.

Front 13

Nerve to the piriformis (Sacral plexus)

Back 13

function- sensory, postganglionic sympathetic, & motor (lmn); innervation of the piriformis muscle.

Front 14

Nerve to the quadratus femoris (sacral plexus)

Back 14

function- sensory, postganglionic sympathetic, & motor (lmn); innervation of the quadratus femoris and inferior gemellus muscles.

Front 15

Nerve to the obturator internus (sacral plexus)

Back 15

function- sensory, postganglionic sympathetic, & motor (lmn); innervation of the obturator internus and superior gemellus muscles.

Front 16

Superior gluteal n. (sacral plexus)"

Back 16

function- sensory, postganglionic sympathetic & motor (lmn); innervation of gluteus medius, gluteus minimis, & tensor facia lata muscles.

Front 17

Inferior gluteal n. (sacral plexus)

Back 17

function- sensory, postganglionic sympathetic & motor (lmn); innervation of gluteus maximus muscle.

Front 18

Muscular branches of the Sciatic nerve – tibial division (sacral plexus)

Back 18

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

Front 19

Sural branch of the tibial nerve (origin: sciatic)

Back 19

function- sensory, postganglionic sympathetic & motor (lmn); innervation of the skin overlying the lateral aspect of the leg and foot.

Front 20

Muscular branches of the tibial n. (origin: sciatic)

Back 20

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

Front 21

Medial plantar branch of the tibial nerve (origin: sciatic)

Back 21

function- sensory, postganglionic sympathetic & motor (lmn); innervation of the medial muscles of the plantar surface of the foot.

Front 22

Lateral plantar branch of the tibial nerve (origin: sciatic)

Back 22

function- sensory, postganglionic sympathetic & motor (lmn); innervation of the lateral muscles of the plantar surface of the foot.

Front 23

Muscular branches of the Sciatic nerve – peroneal division (sacral plexus)

Back 23

function- sensory, postganglionic sympathetic & motor (lmn); innervation of the short head of the biceps femoris.

Front 24

Lateral sural branch of the common peroneal nerve (origin: sciatic)

Back 24

function- sensory, postganglionic sympathetic & motor (lmn); innervation of the skin overlying the lateral aspect of the leg.

Front 25

Deep peroneal branch of the common peroneal nerve (origin: sciatic)

Back 25

function- sensory, postganglionic sympathetic & motor (lmn); innervation of the tibialis anterior, extensor hallucis longus, extensor digitorum longus & peroneus tertius muscles.

Front 26

Superficial peroneal branch of the common peroneal nerve (origin: sciatic)

Back 26

function- sensory, postganglionic sympathetic & motor (lmn); innervation of the peroneus longus & peroneus brevis muscles.