Anatomy LE Flashcards
Question
Answer
this is the only muscle innervated by the peroneal division of the sciatic nerve above the fibular neck
the short head of the biceps femoris
why is the innervation of the biceps femoris interesting
this is the only muscle innervated by the peroneal division of the sciatic nerve above the fibular neck
this is the most common neural injury during THA
peroneal division of the sciatic nerve
mnemonic for shermans hip exam
3, 5, 24, 24, 5, 45, 12
these two nerves exit the pelvis through the greater sciatic foramen and reenter through the lesser
pudendal nerve and the nerve to obturator internus
femoral nerve innervation
iliacus, psoas, sartorius, usually pectineus, and quad femoris (vastus lateralis, intermedius, medialis, and rectus femoris)
obturator nerve innervation
gracilis, 3 adductors (magnus, longus, and brevis)
inferior gluteal nerve innervation
gluteus maximus
sciatic nerve innervation
semi-T, semi-M, biceps femoris (long head is tibial division, short head is peroneal division) and part of adductor magnus
2 semis, 2 biceps, and half of adductor magnus
innervation of the sciatic nerve
tibial nerve innervation
gastroc, soleus, plantaris, tib post, FDL, FHL, medial and lateral plantar nerves
deep peroneal nerve innervation
Anterior tib, EDL, EHL, EDB, peroneus tertius
SPN innervation
peroneus longus and brevis
peroneus longus and brevis supplied by
SPN
gracilis, 3 adductors (magnus, longus, and brevis) supplied by
obturator
strongest portion of the hip joint capsule
iliofemoral ligament
internal rotation of the hip capsule is limited by this structure
ischiofemoral ligament
ischiofemoral ligament does this
limits internal rotation of the hip capsule
this is the division between the greater and lesser sciatic foramina
sacrospinous ligament
this is the inferior border of the lesser sciatic foramen
sacrotuberous ligament
the exit and spatial orientation of the sciatic nerve
as it comes out of the greater sciatic foramen, the sciatic nerve divides into a peroneal and tibial division, the latter of which is more medial. this is why peroneal is more commonly injured
where is the lumbar plexus found
the lumbar plexus is found on the anterior surface of the quadratus lumborum, deep to the psoas
where is the genitofemoral nerve found
the genitofemoral nerve pierces the psoas to lie on its anteromedial surface
where is the femoral nerve found, proximal to its exit under the inguinal ligament
femoral nerve is between the iliacus and the psoas
where is the LFCN found
LFCN lies on top of iliacus, exits underneath the inguinal ligament
femoral triangle
sartorius laterally, pectineus medially, and inguinal ligament. Floor is iliacus, psoas, pectineus, and adductor longus (I Pso Pec Add Long)
course of the saphenous nerve at the apex of the femoral triangle
saphenous nerve branches here and courses under sartorius
POPS IQ
pudendal, obturator internus, postfemoral cutaneous, sciatic, inferior gluteal, quadratus femoris.
this part of the obturator nerve can be to blame for referred knee pain
the posterior division travels to the knee
the corona mortis is a connection between
inferior epigastric branch of the external iliac and the obturator arteries
this vessel supplies the gluteus maximus
inferior gluteal artery
this vessel supplies the short external rotators
inferior gluteal art
this vessel can be injured in the sciatic notch
superior gluteal art
this vessel can be injured with anterior inferior screw placement
obturator art
this vessel can be injured with anterior superior screw placement
external iliac art
origin of the lateral and medial femoral circumflex arts
these come of the profunda femoris, after it splits off the femoral art
Smith Pete
TFL (SGN) and sartorius (femoral) superficially, and the rectus and gluteus medius deep. Danger is LFCN and the ascending branch of the LFCA
Watson Jones
TFL and medius (both SGN). Descending branch of LFCA
Posterior hip approach
G Max (IGN) and G medius/TFL (SGN). Sciatic n, inferior G art, MFCA if quadratus divided
medial hip approach
gracilis and adductor longus. Anterior division of obturator nerve, MFCA (between the adductor brevis and pectineus)
muscles of the posterior thigh
2 semis, 2 biceps. Gracilis is an adductor.
the two branches of the sciatic travel together here right before they split
you can find the sciatic divisions still together between the semiMEMBRANOSUS and the LONG biceps head as they enter the popliteal fossa and divide
the relationship of the tibial nerve and popliteal vessel as they exit the pop fossa
the nerve is posterior to the artery
the tethering structure of the distal pop fossa
the tibial nerve and pop art descend b/t the two heads of the gastroc
this supplies the femoral head until age 4
posterior branch of the obturator artery
contents of the posterolateral corner of the knee
arcuate lig, popliteus, posterolateral capsule, LCL, popliteofibular ligament, biceps femoris, fabellofibular lig, and IT band
anterior lower leg contents
anterior tib, EHL, EDL, peroneus tertius. DPN, anterior tibial artery.
lateral lower leg contents
peroneus brevis and longus. SPN
deep posterior lower leg contents
FHL, FDL, Popliteus, Posterior tib. Tibial nerve, posterior tibial and peroneal arteries
superficial posterior lower leg contents
gastroc, soleus, plantaris. No neurovasc structures
this branch of the popliteal art supplies the menisci
the menisci are supplied by the medial and lateral geniculates
this branch of the popliteal art supplies the cruciate ligaments
the cruciate ligaments are supplied by the middle geniculate art
this can be injured during a lateral release
the superior lateral geniculate art can be injured during a lateral release
order of insertion of structures on the proximal fibula
from anterior to posterior, the LCL, popliteofibular lig, and the biceps
popliteus insertion on the distal femur
inferior, anterior, and deep to the LCL
LCL insertion on the femur
posterior and superior to the popliteus tendon
this is the most anterior structure inserting on the proximal fibula
the LCL
how is the ATFL tested
to tighten this the foot is plantar flexed
how is the CFL tested
to tighten this the foot is inverted and neutral
actual name for the spring ligament
plantar calcaneonavicular ligament is the spring ligament
baxters nerve
first branch of lateral plantar nerve, to Abductor DQ
where does the tibial nerve divide
under the flexor retinaculum
into what does the tibial nerve divide
into the medial and lateral plantar nerves
the medial plantar nerve runs deep to this
abductor hallucis
the lateral plantar nerve runs deep to this
quadratus plantae
analog of the medial plantar nerve
think of the medial plantar as equivalent to the median nerve of the hand
analog of the lateral plantar nerve
think of the lateral plantar as equivalent to the ulnar nerve of the hand, as it innervates the intrinsics of the foot that involve minimi, interosseous, and adductor hallucis
only intrinsic foot muscle not innervated by the tibial nerve
EDB is supplied by the DPN
this muscle affects motion of the great toe and is innervated by the lateral plantar nerve
the adductor hallucis
adductor hallucis innervation
this muscle is innervated by the lateral plantar nerve
this artery has been shown to be the dominant blood supply in some femoral heads
the inferior gluteal artery, which often anastomoses with the deep branch of the medial femoral circumflex art
