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composite of two closely related muscles (iliacus and psoas major) whose fibers pass under the inguinal ligament to insert via a common tendon on the femur.

iliacus, psoas major, sartorius

list the 3 anterior and medial muscles the originate on the pelvis or spine.

prime mover for flexing thigh of for flexing trunk on thigh.

action of iliacus?

same as iliacus; also effects lateral flexion of vertebral column; important postural muscle

action of psoas major?

flexes, abducts, and laterally rotates thigh; flexes knee, produces the cross-legged position.

action of sartorius?

adductor magnus, adductor longus, adductor brevis, pectineus, gracilis

list the 5 muscles of the medial compartment of the thigh.

astride a horse, important in pelvic tilting movements that occur during walking and in fixing the hip when the knee is flexed and the foot is off the ground.

list examples of when the adductor muscles are used.

adducts and medially rotates and fleces thigh; thigh extension

actions of adductor magnus?

adducts, flexes, and medially rotates thigh.

actions of adductor longus?

adducts and medially rotates thigh.

actions of adductor brevis?

same as adductor longus

actions of pectineus?

adducts thigh, flexes and medially rotates leg, especially during walking.

actions of gracilis?

rectus femoris, vastus lateralis, vastus medialis, and vastus intermedius

list the muscles that compose the quadriceps femoris.

extends knee and flexes thigh at hip

actions of rectus femoris?

extends and stabilizes knee

actions of vastus lateralis?

extends knee

action of vastus medialis?

tensor fasciae latae, vastus intermedius, rectus femoris, vastus lateralis, vastus medialis

list the 5 muscles of the anterior compartment of the thigh.


where do the gluteal muscles originate?

gluteus maximus, gluteus medius, gluteus minimus

list the 3 gluteal muscles.

major extensor of thigh; climbing stairs and running; generally inactive during stand and walking

actions of gluteus maxiumus? when is it inactive?

abducts and medially rotates thigh; extremely important in walking

actions of gluteus medius?

same as gluteus medius

action of gluteus minimus?

piriformis, obturator externus, obturator internus, gemellus, quadratus femoris

list the 5 lateral rotators.

rotates extended thigh laterally

action of piriformis?

same as piriformis

action of obturator externus?

same as piriformis

action of obturator internus?

same as piriformis

action of gemellus?

rotates thigh laterally and stabilizes hip joint.

actions of quadratus femoris?


list the name of the grouping of muscles on the posterior compartment of the thigh.

biceps femoris, semitendinosus, semimembranosus

list the 3 hamstrings.

extends thigh and flexes knee

actions of biceps femoris?

extends thigh and flexes knee

action of semitendinosus?

extends thigh and flexes knee

actions of semimembranosus?

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