Muscle
Quadratus femoris
Strong lateral rotator
High-yield
Nerve to quadratus femoris (L4-S1); strong lateral rotator of the thigh.
Overview
A flat quadrangular muscle between the ischial tuberosity and femur that is a powerful lateral rotator of the hip.
Reference facts
- Origin
- Lateral border of the ischial tuberosity
- Insertion
- Quadrate tubercle on the intertrochanteric crest of the femur
- Action
- Laterally rotates the thigh and steadies the femoral head
- Innervation
- Nerve to quadratus femoris (L4, L5, S1)
- Blood supply
- Medial femoral circumflex artery
Frequently asked questions
What does the quadratus femoris do?
The quadratus femoris laterally rotates the thigh and steadies the femoral head.
What nerve innervates the quadratus femoris?
The quadratus femoris is innervated by the nerve to quadratus femoris (L4, L5, S1).
Where does the quadratus femoris attach?
The quadratus femoris originates from the lateral border of the ischial tuberosity and inserts on the quadrate tubercle on the intertrochanteric crest of the femur.
What is the blood supply of the quadratus femoris?
The quadratus femoris is supplied by the medial femoral circumflex artery.