Name

# Quadratus Femoris

Pronunciation

(kwod-RA-tus fe-MOR-us)

Origin/Proximal Attachment

Lateral aspect of ischial tuberosity

Insertion/Distal Attachment

Quadrate line (along posterior aspect of femur & intertrochanteric crest)

Action/Relevance

Externally rotates the thigh

Innervation

Nerve to quadratus femoris (L4, 5,S1)

Notes

A flat quadrilateral muscle.

Lies between gemellus inferior and upper border of adductor magnus.

Passes posteriorly to the hip joint and femoral neck separated from the neck by obturator externus.

A bursa may be present between the muscle and the lesser trochanter.