Anatomy of the Face - Flipbook - Page 38
Zygomatic Bone
The zygomatic bone (or zygoma) is a paired, irregular bone that defines the anterior and lateral portions of the face. The
zygomatic complex is involved in the protection of the contents of the orbit and the contour of the face and cheeks. The
zygomatic bone is a single bone bounded the zygomatic bone can withstand the forces of mastication and transmitting
reactionary forces from the maxilla. It also plays a crucial role in maintaining the aesthetic beauty and function of the face and
protecting the eyes. The zygomatic arch is also vital in the mastication system, as it gives rise to the masseter muscle, which is the
major jaw adductor in mammals sutures that articulate with the frontal, maxilla, temporal, and sphenoid bones.
The blood supply for the facial bones is mainly provided by the maxillary artery, which originates from a terminal branch of the
external carotid artery
The zygomatic bone could also vary among different ethnic populations. Prominence of the zygomatic bone was associated with
Eastern Asian populations and populations from Eastern Europe. However, there was diffusion of this trait in populations across the
Behring sea and the Arctic, North America, and South America areas. Some arctic groups show a prominence of the zygomatic
bone to adapt to extreme cold conditions.
The zygomatic bone may also fracture during facial trauma. Fractures of the zygomatic bone are among the most common
types of facial fracture and primarily result from assaults and motor vehicle accidents.
MUSCLES ORIGINATING FROM ZYGOMATIC BONE
Lateral surface attaches Zygomaticus Minor and Major muscles
Posteroinferior border - Masseter muscle
Tubercle of frontal process - lateral palpebrae ligament, a suspensory ligament and part of the aponeurosis of Levator palpebrae
superioris
Maxillary border gives origin to part of Levator labii superioris
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