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A slight ridge is sometimes seen commencing about the middle of the intertrochanteric crest, and reaching vertically downward for about 5 cm. along the back part of the body: it is called the linea quadrata (or quadrate line), and gives attachment to the Quadratus femoris and a few fibers of the Adductor magnus.
Upper extremity of right femur viewed from behind and above.
This article incorporates text in the public domain from page 246 of the 20th edition of Gray's Anatomy (1918)
