test 4 Flashcards
Rectus Femoris insertion
Superior aspect of the patella and the patellar tendon to the tibial tuberosity
Rectus Femoris Origin
anterior inferior iliac spine of the ilium and grove above the acetabulum
Rectus femoris action
flexion of hip, extension of knee, anterior pelvic rotation
Semitendinosus origin
ischial tuberosity
Semitendinosus insertion
anterior medial surface of the tibia below the condyle
Semitendinosus action
flexion of knee, extension of hip, internal rotation of the hip, internal rotation of the flexed knee, posterior pelvic rotation
Semimembranosus origin
ischial tuberosity
Semimembranosus insertion
posteromedial surface of the medial tibial condyle
Semimembranosus action
flexion of the knee, extension of the hip, internal rotation of the hip and flexed knee, posterior pelvic rotation
Biceps femoris origin
long head: ischial tuberosity
short head: lower half of the line aspera, and lateral condyloid ridge
Biceps femoris insertion
lateral condyle of the tibia and head of the fibula
Biceps femoris action
flexion of the knee, extension of the hip, external rotation of the hip and flexed knee, posterior pelvic rotation
Gluteus maximus origin
posterior fourth of the crest of the ilium, posterior surface or the sacrum of the coccyx near the illium, and fascia of the lumbar area
Gluteus maximus insertion
oblique ridge (gluteal tuberosity) on the lateral surface of the greater trochanter and the illiotibial band of the fascia latae
Gluteus maximus action
extension of the hip, external rotation of the hip, upper fibers: assist in hip abduction lower fibers: assist in hip adduction posterior pelvic rotation
Gluteus medius origin
lateral surface of the ilium just below the crest
Gluteus medius insertion
posterior and middle surfaces of the greater trochanter of the femur
Gluteus medius action
abduction of the hip
lateral pelvic rotation to ipsilateral side
anterior fibers: internal rotation, flexion of the hip, and anterior pelvic rotation
Posterior fibers: external rotation, extension of the hip, and posterior pelvic rotation
Gluteus minimus origin
lateral surface of the ilium just below the origin of the gluteus medius
Gluteus minimus insertion
anterior surface of the greater trochanter of the femur
Gluteus minimus action
abduction of the hip lateral pelvic rotation to ipsilateral side Internal rotation as the femur abducts Flexion of the hip Anterior pelvic rotation
Tensor fasciae latae origin
anterior iliac crest and surface of the ilium just below the surface of the crest
Tensor fasciae latae insertion
one fourth of the way down the thigh into the iliotubial tract, which intern inserts onto gerdy’s tubercle of the anterolateral tibial condyle.
Tensor Fasciae Latae action
abduction and flexion of the hip
rotation of the hip internally w/ flexion
anterior pelvic rotation
six deep lateral rotator muscles
piriformis gemellus superior gemellus inferior obturator externus obturator internus quadratus femoris
Vastus lateralis origin
intertrochanteric line, anterior and inferior border of the greater trochanter, gluteal tuberosity, upper half of the linea aspera, and entire lateral inter muscular septum
Vastus lateralis insertion
lateral border of the patella and patellar tendon to the tibial tuberosity
Vastus lateralis action
extension of the knee
Vastus intermedius origin
upper two thirds of the anterior surface of the femur
Vastus intermedius insertion
upper border of the patella and patellar tendon to the tibial tuberosity
Vastus intermedius action
extension of the knee
Vastus medialis origin
whole length of the linea aspera and the medial condyloid ridge
Vastus medialis insertion
medial half of the upper border of the patella and patellar tendon to the tibial tuberosity
Vastus medialis action
extension of the knee
Popliteus origin
posterior surface of the lateral condyle of the femur
Popliteus insertion
upper posterior medial surface of the tibia
Popliteus action
flexion of the knee
internal rotation of the knee during flexion
What muscles make up the quadriceps?
vastus medialis, Vastus lateralis, Vastus intermedius, rectus femoris
What ligament in the knee is most commonly injured
ACL
What do menisci do?
they aid in shock absorption
When is the rectus femoris most effective
during the squat
