Quadratus Femoris

Joe Muscolino

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The quadratus femoris of the deep lateral rotator group is drawn in bilaterally. The inferior gemellus and adductor magnus have been ghosted in on the left side.

The Quadratus Femoris is a member of the Deep Lateral Rotator Group (also known as the Deep 6), composed of the following six muscles (from superior to inferior):

  • Piriformis
  • Superior gemellus
  • Obturator internus
  • Inferior gemellus
  • Obturator externus
  • Quadratus femoris

 

ATTACHMENTS:

  • The quadratus femoris attaches from the ischial tuberosity to the  intertrochanteric crest of the femur.

 

ACTIONS:

  • Laterally rotates the thigh at the hip joint.
  • Horizontally abducts the thigh at the hip joint.
  • Adducts the thigh at the hip joint.
  • Contralaterally rotates the pelvis at the hip joint.

 

NOTE: The quadratus femoris is usually the largest member of the deep lateral rotator group.