ORBIT OF HUMAN SKULL
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The document discusses the anatomy of the orbit, including its contents and surrounding walls. It notes that the orbit contains the eyeball, extraocular muscles, nerves, vessels, orbital fat, and lacrimal gland. The four walls of the orbit are the medial, lateral, floor and roof walls. Seven bones make up the walls: frontal, ethmoid, maxillary, lacrimal, zygomatic, sphenoid and palatine. Each wall is described in more detail, including the bones that comprise it. The document concludes by listing the cranial nerves that enter the orbit.
ORBIT OF HUMAN SKULL
- 2. What do you mean by a ORBIT
- 5. Rajeswari.K-Orbit CONTENTS OF ORBIT Eyeball : 1/5 of orbit Muscles : 4 Recti , 2 Oblique , LPS , Mullers muscle Nerves : Vessels :Ophthalmic artery & sup & inf ophthalmic vein Orbital fat Lacrimal Gland & Sac
- 6. Rajeswari.K-Orbit 4 WALLS 1. Medial 2. Lateral 3. Floor 4. Roof 7 BONES 1. Frontal 2. Ethmoidal 3. Maxillary 4. Lacrimal 5. Zygomatic 6. Sphenoid 7. Palatine
- 7. Rajeswari.K-Orbit MEDIAL WALL Thinnest Orbital Wall Prone for damage & sinusitis spread Bones Frontal Process Of Maxilla Lacrimal Bone Ethmoid Bone Body Of The Sphenoid
- 8. Rajeswari.K-Orbit LATERAL WALL Bones Greater wing of sphenoid Frontal process of zygomatic Fissures Inferiorly inferior orbital fissure Medially superior orbital fissure
- 9. Rajeswari.K-Orbit FLOOR WALL Shortest Orbital Wall Bones Maxillary Bone Zygomatic Bone Palatine Bone
- 10. Rajeswari.K-Orbit ROOF WALL Frontal bone Lesser wing of sphenoid
- 11. Rajeswari.K-Orbit NERVE SUPPLY The lacrimal, frontal, & trochlear nerves enter the orbit superior to the ring. Naso ciliary, Abducent & Occulomotor Nerve enter the orbit centre to the ring. Optic Nerve enters the orbit through the optic canal of the ring.
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