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28 Cards in this Set

  • Front
  • Back
iliac crest
peaks at L4 spinous process level
PIIS
partial attachment site for the sacrotuberous ligament; found level with the S2 vertebra and marks the greater sciatic notch
ischial tuberosity
the origin of hamstring muscles and site of attachment of sacrotuberous ligament
sacrospinous ligament
ligament that attaches the sacrum and coccyx to the ischial spine
sacrotuberous ligament
longitudinally placed ligament that attaches the sacrum and coccyx to the ischial tuberosity; this ligament closes off the lesser sciatic notch to form the lesser sciatic foramen
greater and lesser sciatic foramen
foramen formed by the attachments of the sacrotuberous and sacrospinous ligaments; neurovascular elements travel through these foramina from the pelves to the gluteal region or perineum
superior gluteal nerve
travels b/t gluteus medius and gluteus minimus to innervated these muscles; damage to this nerve can cause pelvis to sag when contralateral leg is lefted (positive Trendelenburg sign)
superior gluteal artery
lgst branch of posterior division of IIA; divides into superficial and deep branches (superficial enters gluteus maximus and deep travels with superior gluteal nerve to supply gluteus medius and minimus)
inferior gluteal nerve
enters gluteal region superficial to sciatic nerve to innervate gluteus maximus
inferior gluteal a.
arises from anterior division of IIA; to supply lower gluteus maximus ; provides some branches to piriformis, S&I gemelli, and obturator internus
sciatic nerve
emerges from infrapiriformic space and lies superficial to the short lateral rotators; hypertrophy or inflammation of the piriformis muscle can lead to inflammation of this nerve; composed of tibial (anterior division) and peroneal (posterior division) components; descending in the posterior thigh the nerve supplies the hamstring muscles then splits into tibial and common peroneal nerves usually at apex of popliteal fossa
posterior femoral cutaneous n.
nerve that is cutaneous to lower buttock, posterior thigh, and popliteal region; gives off important perineal branches to the skin of external genitalia
neves to obturator internus
emerges deep in the infrapiriformic space to supply superior gemellus; crosses the ischial spine to enter the lesser sciatic foramen to supply the obturator internus muscle
nerve to quadratus femoris
nerve that emerges deep in the infrapiriformic space, passing deep to obturator internus tendon to supply the inferior gemellus and the quadratus femoris
pudendal n.
most medial and deep at the greater sciatic foramen; passes over the sacrospinous ligament with internal pudendal vessels to enter the lesser sciatic foramen to provide motor and sensory supply to the perineum
hamstrings (m. of posterior thigh)
cmmone origins from the ischial tuberosity (except short head of biceps femoris); common n. supply via branches of tibial division of sciatic n. (except short head of biceps that is supplied by peroneal division of sciatic n.); major function of these muscles is to extend the thigh and flex the leg
semitendinosus
slender muscle with large tendon that travels medially to insert on medial anterior upper shaft of tibia (pes anserinus is a common insertion site for gracillis and sartorius too)
semimembranous
long, flat muscle with tendinous origin and insertion; lies deep to semitendinout and inserts on tibia
biceps femoris
composed of long and short heads; long head originates from ischial tuberosity and sacrospinous ligament; short head originates from femur (linea aspera) & inserts on lateral side of head of fibula
linea aspera
indention on femur where the short head of biceps femoris originates
sciatic n.
usually splits into tibial and common peroneal compontents just above popliteal fossa
common peroneal n.
branch of sciatic n. that passes laterally just deep to the tendon of the biceps femoris and wraps around the neck of the fibula to enter the lateral leg;
tibial n.
branch of the sciatic n.; passes into the posterior leg b/t the 2 heads of the gastrocnemius
popliteus m.
small muscle that contributes to the floor of the popliteal fossa
popliteal a.
as the femoral a. passes through the adductor hiatus and into the popliteal fossa, it becomes this a.; it descends through the middle of the popliteal fossa deep to the popliteal v.; it gives off genicular arteries that supply the knee joint
popliteal v.
union of the anterior and posterior tibial veins; lies superficial to the popliteal a.; small saphenous vein drains into this vein w/n popliteal fossa
medial sural cutaneous n.
nerve that arises from the tibial nerve in the popliteal fossa; joins posterior communicating branch from the lateral sural cutaneous nerve to from the sural nerve
sural n.
nerve that provides cutaneous innervation the posterior, medial, and lateral aspects of the leg