Function of the Quadratus femoris and Obturator externus

Biomechanical study investigating the function of the Quadratus femoris and Obturator externus

Previous literature has shown that the Quadratus femoris (QF) and Obturator externus (OE) muscles are some of the most frequently injured muscles of the hip, which are often overlooked due to the lack of functional and diagnostic knowledge currently available.

In order to better understand their role in symptoms of the hip, the authors of the present study set out to clearly define the primary maximal strength and stretch positions of QF and OE. Following investigation it was shown that maximal strength of the QF is from a flexed position towards extension, whereas OE is from an extended position towards flexion and adduction.


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