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Osteology of Head & Neck - Zygomatic Bone

Zygomatic Bone It is paired bone. It forms the prominence of the cheek. It has 3 surfaces - Lateral, Temporal & Orbital 2 Processes - Frontal & Temporal 5 Borders - Anterosuperior, Anteroinferior, Posterosuperior, Posteroinferior & Posteromedial Lateral surface: Smooth and concave Presents one or more foramina - Zygomatico facial foramina transmitting zygomaticofacial nerves & vessels Oblique ridge - anterior part gives attachments to zygomaticus minor & posterior part gives attachment to zygomaticus major along the infraorbital margin near the maxilla give attachment to elevator labii superioris Temporal surface: has anterior rough part articulating with zygomatic process of maxilla posterior rough part is smooth forms anterior wall for temporal & infra temporal fossa Presents one or more zygomaticotemporal foramina transmitting zygomaticotemporal nerves & vessels Orbital surface - forms floor & lateral wall of orbit presents zygomaticoorbital foramen leads to y - shaped canal which opens at zygomaticotemporal & zygomaticofacial foramina. 1cm below the front zygomatic suture it presents Whitnall’s tubercle which gives attachment to 1. lateral palpebral ligament 2. check ligament of lateral rectus 3. suspensory ligament of eyeball 4. aponeurosis of levator palpebrae superioris Anterosuperior border forms the infraorbital margin Anteroinferior border Posterosuperior border is italic f - shaped becomes continuous above with posterior border of zygomatic process of frontal bone and below with the upper margin of zygomatic arch gives attachment to temporal fascia Posterioinferior border Posteromedial border articulate with lateral border of orbital surface of greater wing of sphenoid in the upper part Lower part articulates with maxilla Frontal process - articulates with zygomatic process of Frontal bone Temporal process articulates with zygomatic process of temporal bone forming zygomatic arch Follow me in blogspot - https://human-anatomylessons.blogspot... _________________________________________________________________________________________________________________ Visit my blogs - https://humananatomyonline.in/ Contact me @ https://t.me/humananatomylessons