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Home | OG anatomy | Gross Anatomy | Topic index | Chapter 21
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THE ORBIT |
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| The Orbit | |||||||||||||
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| Orbital Margins and walls | |||||||||||||
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Orbital Margins: Superior (s): Frontal bone. Lateral margin (L) : Zygomatic bone. Inferior margin (I): Zygomatic and maxillary bones. Medial margin(m): maxilla, lacrimal and frontal bones Orbital Walls Roof: Frontal and sphenoid bones Lateral wall: Zygomatic and Sphenoid bones. Floor: Maxilla, Zygomatic and palatine bones. Medial wall: Ethmoid, lacrimal and frontal bones
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Orbital Relations and Foramina |
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Relations Superior: Anterior cranial fossa and frontal sinus(A). Inferior: Maxillary sinus(B). Medial: Ethmoid and sphenoid air sinuses(C). Lateral: Temporal fossa infront and middle cranial fossa behind(D) Foramina
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It is shaped like a pear or a four-sided pyramid with the apex situated posteriorly and the base anteriorly.