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- The
ilio-psoas is a muscle much written about. He possesses three
insertion heads : iliac, lumbar and femoral. External rotator for
some, internal for the others but in any case, powerful thigh
flexor rotator. In fact, it is a muscle working differently
according to whether it has or not initially support on the ground
, according to whether the pelvis is already rocked or not and finally
according to whether the iliac wings open ( hips external rotation
) is made or not via the pelvi-trocanterians muscles.The work of
this muscle is instigated by a good behaviour of the lumbar area.
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