Quadratus femoris muscle

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Not to be confused with quadriceps femoris.
Quadratus femoris muscle
Posterior Hip Muscles 1.PNG
The quadratus femoris and nearby muscles
Quadratus femoris muscle.PNG
Muscles of the gluteal and posterior femoral regions with quadratus femoris muscle highlighted
Latin musculus quadratus femoris
Gray's p.477
Origin Ischial tuberosity
Insertion Intertrochanteric crest
Artery Inferior gluteal artery
Nerve Nerve to quadratus femoris (L4-S1)
Actions lateral rotation and adduction of thigh[1]
Anatomical terms of muscle

The quadratus femoris is a flat, quadrilateral skeletal muscle. Located on the posterior side of the hip joint, it is a strong external rotator and adductor of the thigh,[2] but also acts to stabilize the femoral head in the Acetabulum.

Course[edit]

It originates on the lateral border of the ischial tuberosity of the ischium of the pelvis.[1] From there, it passes laterally to its insertion on the posterior side of the head of the femur: the quadrate tubercle on the intertrochanteric crest and along the quadrate line, the vertical line which runs downward to bisect the lesser trochanter on the medial side of the femur. Along its course, quadratus is aligned edge to edge with the inferior gemellus above and the adductor magnus below, so that its upper and lower borders run horizontal and parallel.[3]

At its origin, the upper margin of the adductor magnus is separated from it by the terminal branches of the medial femoral circumflex vessels.

A bursa is often found between the front of this muscle and the lesser trochanter. Sometimes absent.

Quadratus femoris muscle

Additional images[edit]

Notes[edit]

  1. ^ a b Thieme Atlas of Anatomy (2006), p 424
  2. ^ Platzer (2004), p 238
  3. ^ Mcminn (2003), p 166

References[edit]

This article incorporates text from a public domain edition of Gray's Anatomy.

External links[edit]