The majority of piriformis muscles are innervated by the superior gluteal nerve

  title={The majority of piriformis muscles are innervated by the superior gluteal nerve},
  author={Joe Iwanaga and Seif Eid and Emily A. Simonds and Maia Schumacher and Marios Loukas and R. Shane Tubbs},
  journal={Clinical Anatomy},
The piriformis muscle is clinically implicated in pain disorders, posterior approaches for total hip arthroplasty, and iatrogenic injury to the muscle and the surrounding nerves. The piriformis muscle has been said to receive innervation from L5 to S3 ventral rami with most sources using S1 and S2 ventral rami as the most common innervation this muscle. However, descriptions of the nerve in the literature are vague. Therefore, the aim of this study was to clarify the anatomy of the nerve supply… 

Hamstring branches of the sciatic nerve as donors for neurotization of the superior gluteal nerve: A cadaveric feasibility study

Based on a cadaveric feasibility study, use of a tibial‐innervated hamstring branch as a donor for nerve transfer to the SGN is feasible.

Anatomy, Bony Pelvis and Lower Limb, Piriformis Muscle

The piriformis is a flat, pear-shaped muscle located in the gluteal region of the hip/proximal thigh that presents with hip and buttock pain and is often misdiagnosed and undertreated.

The Importance of Sacral Neuroanatomy in Pain Syndromes and Procedures

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Previously Unreported Sciatic Nerve Variation: Case Report.

An unusual relationship between the sciatic nerve and Piriformis muscle is reported in which the split common fibular nerve went through the piriformis and had a variant communication with the tibial nerve.

A novel method for predicting superior gluteal nerve safe zones in the lateral approach to the hip

The purpose of this study is to assess the accuracy of the trochanter‐to‐iliac crest distance and the nerve‐to-trochanter distance (NTD) ratio in determining a reproducible safe zone around the SGN independent of height.



Piriformis Syndrome: Anatomic Considerations, a New Injection Technique, and a Review of the Literature

The technique used in the current study was successful in injecting the medications near the area of the sciatic nerve and into the piriformis muscle and in the patients who received the injections.

Topography and landmarks for the nerve supply to the levator ani and its relevance to pelvic floor pathologies

The aim of this study was to explore the anatomical variations of the nerve to the levator ani (LA) and to relate these findings to LA dysfunction and to minimize injuries during surgical procedures.

Arthroscopic release of the piriformis muscle under local anesthesia for piriformis syndrome.

  • A. DezawaS. KusanoH. Miki
  • Medicine
    Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association
  • 2003
With this technique, an adequate cavity can be produced and maintained in a manner similar to that in posterior endoscopic surgery for intervertebral disc herniation, which is useful for reducing postoperative pain and allows early return to activity.

Stratificational relationship among the main nerves from the dorsal division of the sacral plexus and the innervation of the piriformis

It is necessary to obtain a detailed understanding of the relationship of the origin and the course of these nerves from the dorsal division of the sacral plexus, with reference to the superior and inferior gluteal nerves.

Arrangement and innervation of the glutei medius and minimus and the piriformis: A morphological analysis

In order to examine the relationships between the positional arrangement and supplying nerves of the glutei medius and minimus and the piriformis, 49 pelvic halves of 28 cadavers were investigated and the detailed findings of the innervation of the three muscles were found.

Surgical Treatment of Piriformis Syndrome

Background Piriformis syndrome (PS) is an uncommon disease characterized by symptoms resulting from compression/irritation of the sciatic nerve by the piriformis muscle. Uncertainty and controversy

The clinical features of the piriformis syndrome: a systematic review

The most common features found in sciatica patients with and without disc herniation or spinal stenosis were: buttock pain, external tenderness over the greater sciatic notch, aggravation of the pain through sitting and augmentation of thePain with manoeuvres that increase piriformis muscle tension.

Piriformis muscle syndrome: an underdiagnosed cause of sciatica.

Diagnosis and Management of Piriformis Syndrome: An Osteopathic Approach

The authors note that several nonpharmacologic therapies, including osteopathic manipulative treatment, can be used alone or in conjunction with pharmacotherapeutic options in the management of piriformis syndrome.