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33 terms

Muscles crossing the hip and knee joints: movements of the thigh and leg

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iliopsoas
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.
pelvis
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?
hamstrings
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?