topic 19 Flashcards
what are the 4 caudal muscles of the buttock and their blood supply
semitendinosus
semimembranosus
biceps femoris
aductor cruris caudalis
a. glutea caud
a. femoris caudalis prox/med/dist
what are the 4 deep muscles of the buttock, and how dou you find them
M. gemelli - most proximal
M. obturatorius internus – white tendon dividing gemelli
M. obturatorius externus - might have to dig a little dist/med to gemelli
M. quadratus femoris – most distal – loose “strip”
what are the 4 dorsal muscles of the buttock
gluteus superficialis
gluteus medius
gluteus profundus
piriformis
what are the nerves originating from the lumbosacral plexus
L6, L7, S1 and S2 - n. ischiadicus
corresponding a. found with them:
L6, L7 and S1 - n. gluteus cranialis
L7, S1 and S2 - n. gluteis caudalis
what do you need to remember when transecting the superf and middle gluteal mm?
Transect the supf. first by the root furthest away from the midline to avoid transecting a nerve. Do the same with the medius, but let piriformis remain intact.
describe how the cranial gluteal nerve run
Goes through m. gluteus profunda and to m. tensor fasciae latae
describe how the caudal gluteal nerve run
Out from n. ischiadicus more caud/close to midline
how do you find n. cutaneus surrae lateralis
There will be several muscular branchings to the biceps, but this one will be distinguishable from the others in that aspect that it is thicker, and most likely one of the more distal branchings.
It will go through the m. biceps femoris and to the lateral side of it
what are the branchings of n. ischiadicus
n. cutaneus surae lateralis
n. cutaneus surae caudalis
n. tibialis
n. peroneus communis
where does the ischiadic nerve divide, and what are the nerves called
By the stifle joint or just above we will expect N. ischiadicus to divide into n. peroneus communis and N. tibialis
describe how n. peroneus communis run and when and what it divides into
runs with tibial nerve medial to the m. biceps femoris
then run in a lateral/distal direction towards the lateral head of m. gastrocnemius where it divides(prox/lat on gastrocn) into n. peroneus supf et prof which will run cranially
= below stifle fibular nerves are cranial
describe how n. tibialis run and when and what it divides into
run paralell with peroneus communis n. and then go btw the two heads of gastrocnemiusto run btw DDF and CC
= below stifle tibial nerves are caudal
what ventral spinal nerve roots are the ischiadic plexus composed of, and what about the lumbosacral?
L6, L7, S1, S2
where are n. cutaneus surae lateralis and n. cutaneus surae caudalis found
both are found in stifle area
The lateral cutaneous sural nerve usually comes from the
common fibular nerve
The caudal cutaneous sural nerve usually comes from the tibial nerve
