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Nerve to Quadratus Femoris Muscle (Left)
Nervous System

Nerve to Quadratus Femoris Muscle (Left)

Nervus musculi quadrati femoris

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Quick Facts

Origin: Lumbosacral trunk (L4-S1).

Course: Leaves the pelvic cavity through the greater sciatic foramen, underneath piriformis, to enter the gluteal region.

Branches: None.

Supply: Motor innovation to quadratus femoris and inferior gemellus muscles.

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Origin

The nerve to quadratus femoris (and the associated inferior gemellus) muscle originates from the lumbosacral plexus, from the anterior divisions of the anterior rami of fourth lumbar to first sacral nerves (Aung et al., 2001).

Course

Following its origin, the nerve to quadratus femoris leaves the pelvic cavity through the greater sciatic foramen, inferior to the piriformis muscle and courses towards the quadratus femoris and the associated inferior gemellus muscles in the gluteal region.

Branches

There are no named branches.

Supplied Structures

The nerve to quadratus femoris provides motor innervation to the quadratus femoris and inferior gemellus muscles.

References

Aung HH, Sakamoto H, Akita K, Sato T. Anatomical study of the obturator internus, gemelli and quadratus femoris muscles with special reference to their innervation. Anat Rec. 2001;263(1):41-52.

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Quadratus Femoris Muscle

ScienceDirect image

The quadratus femoris muscle and part of the obturator externus attach to this surface in the region that is bounded by the acetabulum above and the ischial tuberosity behind.

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