nerves and circulations of the lower extremity Flashcards
what nerve roots supply the lumbosacral plexus
(T12)L1-S4
what n roots supply the lumbar plexus
(T12)L1-L4
what n roots supply the sacral plexus
L4/L5-S4
what are the branches of the first lumbar n.
iliohypogastric
ilioinguinal
genitofemoral
what nerves branch off the lumbar plexus
femoral and obturator
the saphenous nerve branches off what n.
femoral n.
is the saphenous nerve motor or sensory
sensory
what is the diff btw lumbar contribution to sacral plexus of L4 and L5
L4 is 1/2 and all of L5
what nerves branch off the sacral plexus
inf and sup gluteal nerves, sciatic
what does the sciatic n branch into and when does it do that
tibial and common fibular
behind the knee usually
what m. does the sup gluteal n innervate
TFL, glute med and min
what m. does the inf gluteal innervate
glute max
what m. does the sciatic n. innervate
biceps femoris, semi-tend and semi-mem, adductor magnus
by what path does the tibial n reach the foot
stays post and then goes behind med malleolus to go under foot
what does tibial n split into and where
med and lat plantar and under the foot
how does the common fibular nerve go to the front (ant)
goes around head of fibula
what does the common fibular split into and where
into super and deep
after going around head of fiblua it splits
what b. do the deep and superficial fibular n. run along
deep runs along tibia
superficial runs along fibula
what nerves form the sural n. and what n. did they branch off of
med sural cutaneous (tibial)
lat sural cutaneous (common fibular)
what nerve stays superficial and passes on top of the gastroc
sural n.
which is more med btw deep and superficial fibular n.
depp fibular n.
is sural a sensory or motor n
sensory
when does the thoracic aorta become the abdominal aorta
inf to diaphragm
at what level does the abdominal aorta become common iliac a.
at level of L4
what does the common iliac dump into
external and internal iliac a.
what are some branches of internal iliac a.
sup/inf gluteal, obturator a.
what are some branches of external iliac a.
femoral a.
what are some branches of the femoral artery
deep femoral and med/lat femoral cutaneous
what do the perforating arteries do
the supply the post thigh by piercing thru adductor magnus
what does the femoral a. become
popliteal a.
what does the popliteal artery branch into
genicular, ant and post tibial
what a. follows the deep fibular n.
ant tibial a.
what a. follows the tibial n.
post tibial a.
how does the ant tibial a. go to the front
pierces thru interosseous mem
what artery splits into med and lat plantar a.
post tibial a.
what a. does the fibular branch off of
post tibial a.
what artery becomes dorsalis pedis and dorsal arch
ant tibial a.
what v. don’t have accompanying arteries
great saphenous v., small saphenous v.
what opening allows the great saphenous vein to dump into femoral
saphenous opening
what closes off the saphenous opening
cribriform fascia
what v. is more med btw great and small
great saphenous stays med
what v. doesn’t go higher than popliteal v.
small saphenous v.
