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Illustrated Encyclopedia of Human Anatomic Variation: Opus I: Muscular System: Alphabetical Listing of Muscles: G

Gluteus Medius

Ronald A. Bergman, PhD
Adel K. Afifi, MD, MS
Ryosuke Miyauchi, MD

Peer Review Status: Internally Peer Reviewed


This muscle may be divided into two lamallae, or the deeper fibers may end on a separate tendon that inserts into the upper border of the greater trochanter. The muscle may supply slips that join the tendon of piriformis.

A gluteus medius accessorius has been described as arising from the iliac crest under tensor fasciae latae and gluteus medius and inserting on the greater trochanter, partly with medius and partly independently.

Gluteus quartus (gluteus scansorius) is a rare muscle arising between gluteus medius and minimus and inserting onto the tip of the greater trochanter. A gluteoperinealis muscle has also been reported by Gruber.

Syn.: m. gluteus secundu, iliacus externus (M.J. Weber), Mittlerer Gesässmuskel, moyen fessier.

Image 90

Gluteoperinealis.
alpha, alpha', aponeurosis, origin of gluteoperinealis; Beta, Beta', belly of the same muscle; gamma, gamma', insertion of gluteoperinealis. 1, os coccyx; 2, ischial tuberosities; 3, anus; 4, penis. a,a' gluteus maximus.
from Gruber.


References

Gruber, W. (1878) Über den Gesäss-Mittelfleischmuskel (Musculus gluteo-perinealis). Arch. Path. Anat. Physiol. Klin. Med. 74:456-460.

Jazuta, K.M. (1931) Glutaeus medius accessorius. Anat. Anz. 72:10-11.

Macalister, A. (1875) Observations on muscular anomalies in the human anatomy. Third series with a catalogue of the principal muscular variations hitherto published. Trans. Roy. Irish Acad. Sci. 25:1-130.

Valenti, G. (1910) Sur un muscle fessier surnuméraire. Arch. Ital. Biol. 53:153.

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