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Photos of the Zygomatic arch

[ Author:Fushun Ma | Time:2011-10-20 09:48:05 |  Font Size: [Large Medium Small]
Tags: zygomatic arch photo, middle face width, CT image of zyomatic arch

The zygomatic arch is an bony structure of the human face. However unlike the zygomatic bone it is not a separate facial bone, it is composed of the connecting parts of two facial bones. Similarly to the zygomatic bone in function it also provides protection, supporting and attachment of the facial expression muscles. The differences are the zygomatic arch protects the side of the face instead of the lateral front side of the face as the zygomatic bone dose and it provide attachment for less muscles than the zygomatic bone. The zygomatic arch is not as strong as the zygomatic bone it is prone to facture under impact. There is less softer tissue covering the zygomatic arch and its shape can be easily shown on the face. The shape and size can be dramatically different from individual to individual and from ethnic group to ethnic group. So  the character of the zygomatic arch often is used to identify a person or a ethnic group.

As the zygomatic arch is superficial it can be pulped clearly on the side of the face. So the size and the degree of protrusion of the zygomatic arch can be judged by palpitation beside the other ways such as visual estimate and CT image study etc. Put a hand at the temporal area and slid down along the side of the face, if a feeling of sliding over a huge bump occur the zygomatic arch of this person is big or protruding out laterally.

As a bulging out bony structure on the human facial skeleton the size and shape of the zygomatic bone decides the width of the middle face. If the zygomatic arch is protruding the width of the middle face is bigger. Otherwise the width of the middle face is narrow. Anthropologically the Mongolian have flat skull with a short front to rear diameter and a bulging out zygomatic arch making the middle face wide. On the contrary the Caucasian have longer front to rear diameter and the zygomatic arch is flat and staight, so the width is the middle face is smaller.

photo of the zygomatic arch
The zygomatic arch is on the sides of the middle face and is the most prominent point on the lateral of the human face. The yellow line on the left side of the photo covers the left zygomatic arch. Like the arched yellow line the zygomatic arch is an arched structure.

photo of isolated zygomatic arch modified image of the zygoamtic arch
Isolated zygomatic arch from the photo of the skull shows that the upper and lower roots of the zygomatic arch are strong and the middle part of the arch is thin. With some modification of the photo the zygomatic arch looks like the ancient Chinese weapon--"The Bow".

Cross section picture of the zygomatic arch
Cross section picture of the zygomatic arch, two sides of the arch are in a arched shape and symmetrical.

CT image of wide zygomatic archCT image of narrow zygomatic arch
CT image of wide zygomatic arch shows the lateral protruding zygomatic arch. In the photo on the right side the zygomatic arch dose not protruding out laterally in peoples with narrow middle face.

Cross section CT image of wide zygomatic archCT image of narrow zygomatic arch
In protruding zygomatic arch the CT image of the arch is convex. In people with narrow middle face the CT image of the zygomatic arch is straighter as in the image on the right side.

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