Ct anatomy of orbit

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Maajid Mohi ud din

CT ANATOMY OF ORBIT WITH CORONAL SECTIONS

Salud y medicina

M A A J I D M O H I U D D I N M A L I K
L E C T U R E R C O P M S A D E S H U N I V E R S I T Y
B A T H I N D A , P U N J A B
ma a j i d ma l i ko f f i c i a l @ g ma i l . c o m
CT ANATOMY OF ORBIT
MAAJIDMALIKOFFICIAL@GMAIL.COM

INTRODUCTION
By definition, the orbit (bony orbit or orbital cavity) is a
skeletal cavity comprised of seven bones situated within
the skull. The cavity surrounds and provides mechanical
protection for the eye and soft tissue structures related
to it.
MAAJIDMALIKOFFICIAL@GMAIL.COM

CONTINUE
The bones that make up the orbit contain several
foramina and fissures through which important
neurovascular structures (such as the optic nerve (CN
II)) pass through on their way from the brain to the eye
and face and vice versa.
MAAJIDMALIKOFFICIAL@GMAIL.COM

BONES
 Maxilla
 Frontal bone
 Zygomatic bone
 Ethmoid bone
 Lacrimal bone
 Sphenoid bone
 Palatine bone
NOTE:
Mnemonic: Many Friendly Zebras Enjoy Lazy Summer Picnic
MAAJIDMALIKOFFICIAL@GMAIL.COM

WALLS
 Roof (superior): Orbital part of the frontal bone, lesser
wing of the sphenoid bone
 Medial: Orbital plate of the ethmoid bone, lacrimal bone,
frontal process of the maxilla, greater wing of the sphenoid
bone
 Floor (inferior): Orbital surface of the maxilla, zygomatic
bone, palatine bone
 Lateral: Zygomatic bone, sphenoid bone
MAAJIDMALIKOFFICIAL@GMAIL.COM

LANDMARKS AND OPENINGS
Optic foramen (canal),
Lacrimal fossa
Lacrimal groove
Anterior and posterior ethmoidal foramina
Trochlea
Superior and inferior orbital fissures
MAAJIDMALIKOFFICIAL@GMAIL.COM

CONTENT OF THE ORBIT
Eyeballs
Orbital fascia
Orbital fat
Extraocular muscles
Neurovasculature
Lacrimal apparatus
MAAJIDMALIKOFFICIAL@GMAIL.COM

CT ANATOMY OF
ORBIT
MAAJIDMALIKOFFICIAL@GMAIL.COM

1. GREATER WING OF SPHENOID 2. ZYGOMATIC
BONE 3. FRONTAL BONE.
MAAJIDMALIKOFFICIAL@GMAIL.COM

1, OPTIC CANAL 2, GREATER WING OF
SPHENOID 3, ZYGOMATIC BONE 4, FRONTAL BONE.
MAAJIDMALIKOFFICIAL@GMAIL.COM

1, SELLA TURCICA. 2, SUPERIOR ORBITAL FISSURE. 3, GREATER
WING OF SPHENOID. 4, ZYGOMATIC BONE. 5, LAMINA OF THE
ETHMOID BONE. 6, ETHMOIDAL CELLS.
MAAJIDMALIKOFFICIAL@GMAIL.COM

1, SUPERIOR ORBITAL FISSURE. 2, OPTIC NERVE. 3, MEDIAL
RECTUS MUSCLE. 4, LAMINA OF THE ETHMOID BONE.
MAAJIDMALIKOFFICIAL@GMAIL.COM

1, SUPERIOR ORBITAL FISSURE. 2, ZYGOMATIC
BONE. 3, GLOBE. 4, GREATER WING OF SPHENOID. 5, DORSUM
SELLAE.
MAAJIDMALIKOFFICIAL@GMAIL.COM

1, SPHENOID BONE. 2, SUPERIOR ORBITAL
FISSURE. 3, SPHENOTEMPORAL SUTURE. 4, SPHENOZYGOMATIC
SUTURE. 5, LAMINA PAPYRACEA OF THE ETHMOID BONE. 6, SPHENOIDAL
SINUS
MAAJIDMALIKOFFICIAL@GMAIL.COM

1, SPHENOID BONE. 2, LACRIMAL BONE. 3, NASAL
BONE. 4, SUPERIOR ORBITAL FISSURE.
MAAJIDMALIKOFFICIAL@GMAIL.COM

1, SPHENOIDAL SINUS. 2, ETHMOIDAL
CELLS. 3, CAROTID CANAL.
MAAJIDMALIKOFFICIAL@GMAIL.COM

1, FORAMEN ROTUNDEM. 2, ZYGOMATIC BONE. 3, MAXILLARY
BONE. 4, NASAL BONE. 5, INFERIOR ORBITAL
FISSURE. 6, SPHENOIDAL SINUS.
MAAJIDMALIKOFFICIAL@GMAIL.COM

CT ANATOMY OF
ORBIT
CORONAL SECTIONS
MAAJIDMALIKOFFICIAL@GMAIL.COM

1, NASOLACRIMAL DUCT. 2, GLOBE. 3, FRONTAL
SINUS. 4, FRONTAL BONE. 5, ZYGOMATIC BONE.
MAAJIDMALIKOFFICIAL@GMAIL.COM

1, NASOLACRIMAL DUCT. 2, GLOBE. 3, FRONTAL
SINUS. 4, LAMINA OF THE ETHMOID
BONE. 5, INFRAORBITAL CANAL.
MAAJIDMALIKOFFICIAL@GMAIL.COM

1, MAXILLARY SINUS. 2, LAMINA OF THE ETHMOID
BONE. 3, CRISTA GALLI. 4, FRONTAL BONE AND
SINUS. 5, ZYGOMATIC BONE.
MAAJIDMALIKOFFICIAL@GMAIL.COM

1, MAXILLARY BONE AND SINUS. 2, LAMINA PAPYRACEA OF THE
ETHMOID BONE. 3, CRIBRIFORM PLATE (ETHMOID). 4, FRONTAL BONE
AND SINUS. 5, ZYGOMATIC BONE. 6, INFERIOR NASAL CONCHA.
MAAJIDMALIKOFFICIAL@GMAIL.COM

1, MAXILLARY SINUS. 2, MAXILLARY
BONE. 3, ZYGOMATIC BONE. 4, FRONTAL
BONE. 5, LAMINA PAPYRACEA OF THE ETHMOID
BONE. 6, ZYGOMATIC ARCH.
MAAJIDMALIKOFFICIAL@GMAIL.COM

1, ZYGOMATIC ARCH. 2, ZYGOMATIC BONE. 3, FRONTAL
BONE.4, INFERIOR ORBITAL FISSURE.
MAAJIDMALIKOFFICIAL@GMAIL.COM

1, MAXILLARY SINUS. 2, ZYGOMATIC ARCH. 3, INFERIOR ORBITAL
FISSURE. 4, ZYGOMATIC BONE. 5, FRONTAL BONE. 6, LAMINA
PAPYRACEA OF THE ETHMOID BONE. 7, MAXILLARY BONE.
MAAJIDMALIKOFFICIAL@GMAIL.COM

1, MAXILLARY SINUS. 2, ZYGOMATIC
ARCH. 3, ZYGOMATIC BONE. 4, FRONTAL
BONE. 5, MANDIBLE.
MAAJIDMALIKOFFICIAL@GMAIL.COM

ANY QUESTIONS?
THANK YOU
MAAJIDMALIKOFFICIAL@GMAIL.COM

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Ct anatomy of orbit

1. M A A J I D M O H I U D D I N M A L I K L E C T U R E R C O P M S A D E S H U N I V E R S I T Y B A T H I N D A , P U N J A B ma a j i d ma l i ko f f i c i a l @ g ma i l . c o m CT ANATOMY OF ORBIT MAAJIDMALIKOFFICIAL@GMAIL.COM

2. INTRODUCTION By definition, the orbit (bony orbit or orbital cavity) is a skeletal cavity comprised of seven bones situated within the skull. The cavity surrounds and provides mechanical protection for the eye and soft tissue structures related to it. MAAJIDMALIKOFFICIAL@GMAIL.COM

3. CONTINUE The bones that make up the orbit contain several foramina and fissures through which important neurovascular structures (such as the optic nerve (CN II)) pass through on their way from the brain to the eye and face and vice versa. MAAJIDMALIKOFFICIAL@GMAIL.COM

4. BONES  Maxilla  Frontal bone  Zygomatic bone  Ethmoid bone  Lacrimal bone  Sphenoid bone  Palatine bone NOTE: Mnemonic: Many Friendly Zebras Enjoy Lazy Summer Picnic MAAJIDMALIKOFFICIAL@GMAIL.COM

5. WALLS  Roof (superior): Orbital part of the frontal bone, lesser wing of the sphenoid bone  Medial: Orbital plate of the ethmoid bone, lacrimal bone, frontal process of the maxilla, greater wing of the sphenoid bone  Floor (inferior): Orbital surface of the maxilla, zygomatic bone, palatine bone  Lateral: Zygomatic bone, sphenoid bone MAAJIDMALIKOFFICIAL@GMAIL.COM

6. LANDMARKS AND OPENINGS Optic foramen (canal), Lacrimal fossa Lacrimal groove Anterior and posterior ethmoidal foramina Trochlea Superior and inferior orbital fissures MAAJIDMALIKOFFICIAL@GMAIL.COM

7. CONTENT OF THE ORBIT Eyeballs Orbital fascia Orbital fat Extraocular muscles Neurovasculature Lacrimal apparatus MAAJIDMALIKOFFICIAL@GMAIL.COM

8. MAAJIDMALIKOFFICIAL@GMAIL.COM

9. MAAJIDMALIKOFFICIAL@GMAIL.COM

10. MAAJIDMALIKOFFICIAL@GMAIL.COM

11. CT ANATOMY OF ORBIT MAAJIDMALIKOFFICIAL@GMAIL.COM

12. 1. GREATER WING OF SPHENOID 2. ZYGOMATIC BONE 3. FRONTAL BONE. MAAJIDMALIKOFFICIAL@GMAIL.COM

13. 1, OPTIC CANAL 2, GREATER WING OF SPHENOID 3, ZYGOMATIC BONE 4, FRONTAL BONE. MAAJIDMALIKOFFICIAL@GMAIL.COM

14. 1, SELLA TURCICA. 2, SUPERIOR ORBITAL FISSURE. 3, GREATER WING OF SPHENOID. 4, ZYGOMATIC BONE. 5, LAMINA OF THE ETHMOID BONE. 6, ETHMOIDAL CELLS. MAAJIDMALIKOFFICIAL@GMAIL.COM

15. 1, SUPERIOR ORBITAL FISSURE. 2, OPTIC NERVE. 3, MEDIAL RECTUS MUSCLE. 4, LAMINA OF THE ETHMOID BONE. MAAJIDMALIKOFFICIAL@GMAIL.COM

16. 1, SUPERIOR ORBITAL FISSURE. 2, ZYGOMATIC BONE. 3, GLOBE. 4, GREATER WING OF SPHENOID. 5, DORSUM SELLAE. MAAJIDMALIKOFFICIAL@GMAIL.COM

17. 1, SPHENOID BONE. 2, SUPERIOR ORBITAL FISSURE. 3, SPHENOTEMPORAL SUTURE. 4, SPHENOZYGOMATIC SUTURE. 5, LAMINA PAPYRACEA OF THE ETHMOID BONE. 6, SPHENOIDAL SINUS MAAJIDMALIKOFFICIAL@GMAIL.COM

18. 1, SPHENOID BONE. 2, LACRIMAL BONE. 3, NASAL BONE. 4, SUPERIOR ORBITAL FISSURE. MAAJIDMALIKOFFICIAL@GMAIL.COM

19. 1, SPHENOIDAL SINUS. 2, ETHMOIDAL CELLS. 3, CAROTID CANAL. MAAJIDMALIKOFFICIAL@GMAIL.COM

20. 1, FORAMEN ROTUNDEM. 2, ZYGOMATIC BONE. 3, MAXILLARY BONE. 4, NASAL BONE. 5, INFERIOR ORBITAL FISSURE. 6, SPHENOIDAL SINUS. MAAJIDMALIKOFFICIAL@GMAIL.COM

21. CT ANATOMY OF ORBIT CORONAL SECTIONS MAAJIDMALIKOFFICIAL@GMAIL.COM

22. 1, NASOLACRIMAL DUCT. 2, GLOBE. 3, FRONTAL SINUS. 4, FRONTAL BONE. 5, ZYGOMATIC BONE. MAAJIDMALIKOFFICIAL@GMAIL.COM

23. 1, NASOLACRIMAL DUCT. 2, GLOBE. 3, FRONTAL SINUS. 4, LAMINA OF THE ETHMOID BONE. 5, INFRAORBITAL CANAL. MAAJIDMALIKOFFICIAL@GMAIL.COM

24. 1, MAXILLARY SINUS. 2, LAMINA OF THE ETHMOID BONE. 3, CRISTA GALLI. 4, FRONTAL BONE AND SINUS. 5, ZYGOMATIC BONE. MAAJIDMALIKOFFICIAL@GMAIL.COM

25. 1, MAXILLARY BONE AND SINUS. 2, LAMINA PAPYRACEA OF THE ETHMOID BONE. 3, CRIBRIFORM PLATE (ETHMOID). 4, FRONTAL BONE AND SINUS. 5, ZYGOMATIC BONE. 6, INFERIOR NASAL CONCHA. MAAJIDMALIKOFFICIAL@GMAIL.COM

26. 1, MAXILLARY SINUS. 2, MAXILLARY BONE. 3, ZYGOMATIC BONE. 4, FRONTAL BONE. 5, LAMINA PAPYRACEA OF THE ETHMOID BONE. 6, ZYGOMATIC ARCH. MAAJIDMALIKOFFICIAL@GMAIL.COM

27. 1, ZYGOMATIC ARCH. 2, ZYGOMATIC BONE. 3, FRONTAL BONE.4, INFERIOR ORBITAL FISSURE. MAAJIDMALIKOFFICIAL@GMAIL.COM

28. 1, MAXILLARY SINUS. 2, ZYGOMATIC ARCH. 3, INFERIOR ORBITAL FISSURE. 4, ZYGOMATIC BONE. 5, FRONTAL BONE. 6, LAMINA PAPYRACEA OF THE ETHMOID BONE. 7, MAXILLARY BONE. MAAJIDMALIKOFFICIAL@GMAIL.COM

29. 1, MAXILLARY SINUS. 2, ZYGOMATIC ARCH. 3, ZYGOMATIC BONE. 4, FRONTAL BONE. 5, MANDIBLE. MAAJIDMALIKOFFICIAL@GMAIL.COM

30. ANY QUESTIONS? THANK YOU MAAJIDMALIKOFFICIAL@GMAIL.COM

Ct anatomy of orbit

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