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Old 02-28-2011
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MusculoSkeletal What muscle is used?

What muscle is used during straight leg raise?
A- Quadratus lumborum
B- Iliopsoas
C- Vastus Medialis
D- Erector Spinae
E- Latissimus Dorsi
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Old 02-28-2011
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I would go with
B- Iliopsoas

Because of all the muscles listed, I think this is the only muscle that crosses the hip joint. Not sure though and its really hard for me to remember the origin and insertion of muscles.
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Old 03-27-2011
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A- Quadratus lumborum [external rotation of the leg]
B- Iliopsoas [crosses hip joint. strong flexor of the hip]
C- Vastus Medialis [only one of the quads muscles crosses the hip - rectus femorus; the others including vastus medialis does not cross the hip]
D- Erector Spinae [it does what it says - erects the spine but doesn't cross the hip (since it's dorsal and is located in the back. to flex the hip you won't have to be ANTERIOR and CROSS the hip.]
E- Latissimus Dorsi [a superficial muscle of the back.]

B. iliopsoas
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