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.
Related parts of the anatomy
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.
Learn more about this topic from other Elsevier products
Quadratus Femoris Muscle
Ischiofemoral impingement refers to the compression of the quadratus femoris muscle between the ischium and the lesser trochanter in hip extension with external rotation and adduction.
