Anatomy of Quadratus Femoris

Courtesy: Prof Nabil Ebraheim, University of Toledo, Ohio, USA

ANATOMY OF QUADRATUS FEMORIS MUSCLE

ORIGIN

• From the lateral margin of ischial tuberosity

INSERTION

• Into the quadrate tubercle on the intertrochanteric crest between the greater and lesser trochanter

ACTION

• External rotation of the hip and also helps in adduction of thigh

NERVE SUPPLY

• The nerve from sacral plexus called the nerve to quadratus femoris(L5, S1)

RELATIONS

• Medial Femoral Circumflex Artery courses anterior to the superior edge of quadratus muscle
• This artery can be identified in the space between the superior edge of quadratus femoris and inferior gemellus

CLINICAL SIGNIFICANCE

• The detachment of quadratus femoris from femur during the posterior approach to hip results in profuse bleeding from the branch of the medial femoral circumflex artery.