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PSOAS MAJOR
(Iliopsoas Group)
action: flexes thigh at hip; flexes vertebral column
ILIACUS
action: flexes thigh at hip
GLUTEUS MAXIMUS
origin: iliac crest, sacrum, coccyx, and aponeuroses of the lumbar region
insertion: gluteal tuberosity of femur and iliotibial tract
action: extends thigh at hip, laterally rotates thigh at hip
GLUTEUS MEDIUS
action: abducts thigh at hip, medially rotates thigh at hip
TENSOR FASCIAE LATAE
action: abducts thigh at hip
SARTORIUS
(longest muscle in body)
action: flexes thigh at hip, laterally rotates thigh at him, flexes leg at knee (used when crossing legs; weak muscle mainly functions to stabilize the thigh when walking)
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