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The orbit comprises of how many Bones?
Seven bones (■ Frontal ■ Maxilla ■ Zygoma ■ Ethmoid ■ Sphenoid ■ Lacrimal ■ Palatine)
Maxilla consists of How many Processes?
Four processes: Zygomatic, Frontal, Alveolar, and Palatine
The ophthalmic artery enters the orbit through which Canal?
Optic canal
Floor of Nasal Cavity is Contributed by?
Hard Palate (maxilla and palatine bones)
How many Foramina are present in the Greater Wing of Sphenoid?
Three (Rotundum, Ovale and Spinosum)
What are the contents of Infratemporal Fossa?
Temporalis and Pterygoid Muscles, Maxillary Artery (and branches, eg, Middle meningeal) Pterygoid Plexus of Veins, Mandibular nerve (V3), Chorda tympani (VII) Otic ganglion (IX)
The maxillary sinus is lined by which membrane?
Schneiderian Membrane
The ophthalmic artery is the branch of which Artery?
Internal Carotid Artery
KIESSELBACH’S PLEXUS is made up of how many Arteries?
Five arteries: ■ Sphenopalatine artery (from maxillary artery) ■ Greater palatine artery (from maxillary artery) ■ Superior labial artery (from facial artery) ■ Anterior ethmoid artery (from opthalmic artery) ■ Lateral nasal branches from facial artery
Which Bone is Largest and strongest bone of the face?
Mandible
Sphenoid sinuses drain at which area?
Sphenoethmoidal Recess of Nasal Cavity
Maxillary sinuses drain at which area?
Middle Meatus: Ostium (below Middle Concha) (within Hiatus Semilunaris)
Posterior Ethmoid sinuses drain at which area?
Superior Meatus
Nasolacrimal apparatus drains at which area?
Inferior Meatus (below Inferior Concha)
Ethmoid sinuses drain at which area?
Middle Meatus
The Ophthalmic Artery supplies which Structures?
It is the major blood supply to the Orbit and Eye
The Nasal Septum comprises how many Bones?
Five bones and one Cartilage: ■ Vertical plate of ethmoid ■ Vomer ■ Nasal crest of maxilla and palatine bones ■ Nasal crest of sphenoid bones ■ Septal cartilage
Roof of Nasal Cavity is Contributed by?
Cribriform Plate of Ethmoid, Anterior body of Sphenoid, Nasal Spine of Frontal Bone, Nasal bones, Lateral Nasal Cartilages
External Nose is Contributed by?
Two Nasal Bones and Nasal Cartilages
Zygomatic Arch is formed by?
Temporal Process of Zygomatic bone and Zygomatic Process of Temporal bone
Medial wall of Nasal Cavity is Contributed by?
Nasal septum
Anterior Ethmoid sinuses drain at which area?
Hiatus Semilunaris
The Middle Meatus contains openings of which Sinuses?
Frontal sinus, Anterior and Middle Ethmoidal Sinuses, and Maxillary Sinuses
Lateral wall of Nasal Cavity is Contributed by?
Nasal, Ethmoid, Sphenoid, Maxilla, Palatine, and Inferior Conchal Bones
Most cases of Epistaxis arises from which area?
KIESSELBACH’S PLEXUS
The zygomatic bone is also referred to as?
The Malar bone or Cheekbone
Sensory innervation to Nasal Cavity is provided by?
Branches of Maxillary Nerves: ■ Nasopalatine ■ Infraorbital ■ Greater palatine. Some Sensory Branches are from V1 (Ophthalmic Division). ■ Anterior Ethmoidal Nerve
Which type of epithelium is present in Schneiderian membrane?
Pseudo-Stratified Columnar Epithelium
What are the Contents of Pterygopalatine Fossa?
Pterygopalatine (3rd) part of Maxillary Artery and its Branches, Maxillary Nerve (V2), Nerve of Pterygoid canal, Pterygopalatine ganglion and branches
Which type of Cartilage is present in the External Nose?
Hyaline Cartilage
Frontal sinuses drain at which area?
Middle Meatus: Hiatus Semilunaris (below Middle Concha)
Middle Ethmoid sinuses drain at which area?
Ethmoidal bullae
A surgical approach to pituitary gland is via?
Sphenoid Sinus
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