7.1.07 Pns - Lumbosacral Plexus

Front 1

lumbosacral plexus innervates

Back 1

lower limb - some abdomen + pelvis

Front 2

what spinal nerves make up the lumbosacral plexus

Back 2

L1 - S4

Front 3

lumbar plexus roots arise from

Back 3

ventral rami of spinal nerves L1 - L4

Front 4

3 major nerves in the lumbar plexus

Back 4

femoral - saphenous - obturator

Front 5

3 major nerves in the lumbar plexus are located

Back 5

anteriorly

Front 6

femoral nerve innervates

Back 6

quad muscles

Front 7

femoral nerve function

Back 7

extend the knee

Front 8

saphenous nerve is a branch of what major nerve

Back 8

femoral

Front 9

is saphenous branch motor or sensory?

Back 9

sensory branch

Front 10

saphenous nerve is a sensory branch that gives sensation from the

Back 10

skin on the lower leg + interior thigh

Front 11

saphenous nerve function

Back 11

general sensory from the skin of the lower leg + thigh (ex: pressure - touch - vibration - pain)

Front 12

saphenous is a ____ nerve (bringing senses from the skin)

Back 12

cutaneous

Front 13

obturator nerve innervates

Back 13

adductor muscles except adductor magnus

Front 14

obturator nerve innervates all the adductor muscles except

Back 14

adductor magnus

Front 15

obturator nerve function

Back 15

adduction of the thighs

Front 16

sacral plexus roots arise from

Back 16

ventral rami of spinal nerves L4 - L5 + S1 - S4

Front 17

sacral plexus is connected to spinal nerves L4 & L5 by

Back 17

lumbosacral trunk

Front 18

what forms the lumbosacral trunk

Back 18

nerve fibers from L4 + L5

Front 19

the lumbosacral trunk goes down & joins the

Back 19

sacral plexus

Front 20

sacral plexus form nerves to innervate

Back 20

posterior thigh + entire lower leg

Front 21

3 major nerves in the sacral plexus

Back 21

sciatic - tibial - common fibular

Front 22

what is the largest nerve in the body

Back 22

sciatic

Front 23

sciatic nerve innervate

Back 23

all 3 hamstring muscles

Front 24

sciatic nerve function

Back 24

extend thigh - flex knee

Front 25

sciatic nerve splits into 2 nerves

Back 25

common fibular - tibial (split in popliteal region)

Front 26

common fibular & tibial innervate

Back 26

entire lower leg

Front 27

tibial nerve innervates

Back 27

calf muscle (soleus + gastrocnemius)

Front 28

tibial nerve travels along

Back 28

posterior tibia

Front 29

tibial function

Back 29

plantar flex

Front 30

tibial nerve splits into 2 nerves

Back 30

medial - lateral plantar

Front 31

medial & lateral plantar nerves innervate

Back 31

muscles of the foot

Front 32

common fibular travels down what side

Back 32

lateral side

Front 33

common peroneal nerve (fibular) split into 2 branches

Back 33

superficial branch - deep branch

Front 34

superficial branch innervate

Back 34

fibularis muscles (brevis + longus)

Front 35

superficial branch function

Back 35

plantar flexor + eversion

Front 36

deep branch is located

Back 36

anterior of lower leg

Front 37

deep branch function

Back 37

dorsiflexes + inverts foot at ankle

Front 38

pudendal nerve innervates

Back 38

skin and muscles of perineum

Front 39

pudendal nerve function

Back 39

erection - voluntary urination