Zygomatic arch

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Zygomatic arch
Gray188-Sphenozygomatic suture.png
Side view of the skull.
Processuszygomaticusossisfrontalis.PNG
Articulation of the mandible. Lateral aspect.
Latinarcus zygomaticus
Gray'sp.183
Anatomical terminology
 
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Zygomatic arch
Gray188-Sphenozygomatic suture.png
Side view of the skull.
Processuszygomaticusossisfrontalis.PNG
Articulation of the mandible. Lateral aspect.
Latinarcus zygomaticus
Gray'sp.183
Anatomical terminology

The zygomatic arch or cheek bone is formed by the zygomatic process of temporal bone (a bone extending forward from the side of the skull, over the opening of the ear) and the temporal process of the zygomatic bone (the side of the cheekbone), the two being united by an oblique suture (zygomaticotemporal suture);[1] the tendon of the Temporalis passes medial to the arch to gain insertion into the coronoid process of the mandible. The jugal point is the point at the anterior end of the upper border of the zygomatic arch where the masseteric and maxillary edges meet at an angle. The jugal point is the anterior end of upper border of the zygomatic arch where it meets the process of the zygomatic bone.

Structure[edit]

The zygomatic process of the temporal arises by two roots:

The upper border of the arch gives attachment to the temporal fascia;[2] the lower border and medial surface give origin to the Masseter.

History[edit]

Etymology[edit]

The term zygomatic derives from the Greek ζύγωμα zygōma meaning "bolt, bar", derived from ζυγο- "yoke, join". The Greek word was already used with this anatomical sense by Galen (2.437, 746) in the 2nd century AD. The zygomatic arch is occasionally referred to as the zygoma, but this term usually refers to the zygomatic bone or occasionally the zygomatic process.

Other animals[edit]

The zygomatic arch is significant in evolutionary biology, as it is part of the structures derived from the ancestral single temporal fenestra of the synapsid ancestor of mammals.

Additional images[edit]

See also[edit]

This article uses anatomical terminology; for an overview, see anatomical terminology.

References[edit]

This article incorporates text from a public domain edition of Gray's Anatomy.

  1. ^ Herring, Susan W.; Mucci, Robert J. (1991). "In vivo strain in cranial sutures: The zygomatic arch". Journal of Morphology 207 (3): 225–239. doi:10.1002/jmor.1052070302. ISSN 0362-2525. 
  2. ^ Abul-Hassan HS, von Drasek Ascher G, Acland RD (January 1986). "Surgical anatomy and blood supply of the fascial layers of the temporal region". Plastic and Reconstructive Surgery 77 (1): 17–28. doi:10.1097/00006534-198601000-00004. PMID 3941846. 

External links[edit]