ORBIT OF HUMAN SKULL

BONES FORMING THE ORBIT OF HUMAN SKULL

1. Unit -III
ORBIT

2. What do you mean
by a “ORBIT”
??????

3. Rajeswari.K-Orbit

4. Rajeswari.K-Orbit

5. Rajeswari.K-Orbit
CONTENTS OF ORBIT
➤Eyeball : 1/5 of orbit
➤Muscles : 4 Recti , 2 Oblique , LPS , Muller’s 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
➤Thelacrimal, frontal, & trochlearnerves enter the orbit superior to the ring.
➤Naso ciliary, Abducent & Occulomotor Nerveenter the orbit centre to the ring.
➤Optic Nerveenters the orbit through the optic canal of the ring.

12. THANK YOU…