nerves and circulations of the lower extremity

Question 1

what nerve roots supply the lumbosacral plexus

Answer 1

(T12)L1-S4

Question 2

what n roots supply the lumbar plexus

Answer 2

(T12)L1-L4

Question 3

what n roots supply the sacral plexus

Answer 3

L4/L5-S4

Question 4

what are the branches of the first lumbar n.

Answer 4

iliohypogastric
ilioinguinal
genitofemoral

Question 5

what nerves branch off the lumbar plexus

Answer 5

femoral and obturator

Question 6

the saphenous nerve branches off what n.

Answer 6

femoral n.

Question 7

is the saphenous nerve motor or sensory

Answer 7

sensory

Question 8

what is the diff btw lumbar contribution to sacral plexus of L4 and L5

Answer 8

L4 is 1/2 and all of L5

Question 9

what nerves branch off the sacral plexus

Answer 9

inf and sup gluteal nerves, sciatic

Question 10

what does the sciatic n branch into and when does it do that

Answer 10

tibial and common fibular
behind the knee usually

Question 11

what m. does the sup gluteal n innervate

Answer 11

TFL, glute med and min

Question 12

what m. does the inf gluteal innervate

Answer 12

glute max

Question 13

what m. does the sciatic n. innervate

Answer 13

biceps femoris, semi-tend and semi-mem, adductor magnus

Question 14

by what path does the tibial n reach the foot

Answer 14

stays post and then goes behind med malleolus to go under foot

Question 15

what does tibial n split into and where

Answer 15

med and lat plantar and under the foot

Question 16

how does the common fibular nerve go to the front (ant)

Answer 16

goes around head of fibula

Question 17

what does the common fibular split into and where

Answer 17

into super and deep
after going around head of fiblua it splits

Question 18

what b. do the deep and superficial fibular n. run along

Answer 18

deep runs along tibia
superficial runs along fibula

Question 19

what nerves form the sural n. and what n. did they branch off of

Answer 19

med sural cutaneous (tibial)
lat sural cutaneous (common fibular)

Question 20

what nerve stays superficial and passes on top of the gastroc

Answer 20

sural n.

Question 21

which is more med btw deep and superficial fibular n.

Answer 21

depp fibular n.

Question 22

is sural a sensory or motor n

Answer 22

sensory

Question 23

when does the thoracic aorta become the abdominal aorta

Answer 23

inf to diaphragm

Question 24

at what level does the abdominal aorta become common iliac a.

Answer 24

at level of L4

Question 25

what does the common iliac dump into

Answer 25

external and internal iliac a.

Question 26

what are some branches of internal iliac a.

Answer 26

sup/inf gluteal, obturator a.

Question 27

what are some branches of external iliac a.

Answer 27

femoral a.

Question 28

what are some branches of the femoral artery

Answer 28

deep femoral and med/lat femoral cutaneous

Question 29

what do the perforating arteries do

Answer 29

the supply the post thigh by piercing thru adductor magnus

Question 30

what does the femoral a. become

Answer 30

popliteal a.

Question 31

what does the popliteal artery branch into

Answer 31

genicular, ant and post tibial

Question 32

what a. follows the deep fibular n.

Answer 32

ant tibial a.

Question 33

what a. follows the tibial n.

Answer 33

post tibial a.

Question 34

how does the ant tibial a. go to the front

Answer 34

pierces thru interosseous mem

Question 35

what artery splits into med and lat plantar a.

Answer 35

post tibial a.

Question 36

what a. does the fibular branch off of

Answer 36

post tibial a.

Question 37

what artery becomes dorsalis pedis and dorsal arch

Answer 37

ant tibial a.

Question 38

what v. don’t have accompanying arteries

Answer 38

great saphenous v., small saphenous v.

Question 39

what opening allows the great saphenous vein to dump into femoral

Answer 39

saphenous opening

Question 40

what closes off the saphenous opening

Answer 40

cribriform fascia

Question 41

what v. is more med btw great and small

Answer 41

great saphenous stays med

Question 42

what v. doesn’t go higher than popliteal v.

Answer 42

small saphenous v.