Special Senses: Nose & Paranasal Sinuses Flashcards
Parts of the Nose: superior angle
Root
Projects from the face. Vary in size and shape because of differences in nasal cartilage.
Nose
Parts of the Nose: tip
Apex
Parts of the Nose: two piriform openings
Nares
Parts of the Nose: lateral boundaries
Alae
Parts of the Nose: middle septum which separates two nares
Nasal septum
Parts of the Nose: with stiff hairs
Vestibule
Cartilaginous part of the external nose
2 lateral cartilage, 2 alar cartilage and 1 septal cartilage
Divides the chamber of the nose into two nasal cavities
Nasal septum
Component of Nasal septum: forms superior part of the nasal septum
Perpendicular plate of Ethmoid
Nasal septum: thin flat bone
Vomer
Nasal septum: articulates with bony septum
Septal cartilage
Open posteriorly into the nasopharynx thru the choanae.
Nasal cavities
Mucosa lines the nasal cavities except for
Vestibule
Parts of the nasal mucosa: superior 1/3. Contains organ of smell.
Olfactory area
Parts of the nasal mucosa: Inferior 2/3. Where air is warmed and moistened before it goes to respiratory tract.
Respiratory area
Three scroll-shaped elevations. Superior, middle and inferior. Divide the nasal cavity into four passages.
Nasal concha
Nasal passage: sphenoidal sinus
Sphenoethmoidal recess
Nasal passage: posterior ethmoidal sinus
Superior meatus
Nasal passage: anterior/middle ethmoidal sinus, frontal sinus & maxillary sinus.
Middle meatus
Nasal passage: nasolacrimal duct
Inferior meatus
Arterial supply of the nose and paranasal sinuses
Greater palatine artery, Lateral nasal branches of the facial artery, Ant & Post Ethmoidal artery, Superior labial artery and Sphenopalatine artery “GLASS”
Anteriorly situated where all arteries anastomose, where nose bleeding occurs.
Kiesselbach’s area
Venous drainage of the nose and paranasal sinuses
Sphenopalatine, Opthalmic & Facial veins “SOF”
Nerve supply of the nasal septum
Posterior ethmoidal n, Anterior ethmoidal n, Nasopalatine n & Greater palatine n. “PANG”
Nerve for olfaction or smell
Olfactory nerve. Olfactory bulb @ forebrain.m
Air filled extensions of the respiratory part of the nasal cavity into the frontal, ethmoid, sphenoid & maxillary.
Paranasal sinuses
Paranasal sinus: between outer and inner tables of frontal bone.
Frontal sinus
Frontal sinus is detectable by
7 y/o
Frontal sinus drains thru __________ into the infundibulum w/c opens into ________ hiatus of the ______ hiatus.
Frontonasal duct. Semilunar. Middle.
Nerve supply of the frontal sinus
Branch of the supraorbital nerve
Paranasal sinus: comprise several cavities. ________ cells. At ethmoid bone. Three parts: anterior, posterior and middle.
Ethmoid sinus. Ethmoid cells.
Part of Ethmoid sinus: drain into superior meatus
Posterior
Part of Ethmoid sinus: drain into middle meatus
Anterior
Part of Ethmoid sinus: forms ethmoidal bulbs. Drain into this meatus.
Middle
Nerve supply of the Ethmoidal sinus
Nasociliary nerve (CN VI)
Paranasal sinus: unevenly divided. Body of sphenoid. Separated by thin plates of bone from optic nerve and chiasma, ICA & Pituitary gland.
Sphenoidal sinus
Sphenoidal sinus opens into the
Sphenoethmoidal recess
Nerve supply of the sphenoidal sinus
Posterior ethmoidal nerve
Paranasal sinus: largest. Pyramidal shaped.
Maxillary sinus
Parts of Maxillary sinus: apex
Into zygomatic bone
Parts of Maxillary sinus: base
Part of nasal cavity
Parts of Maxillary sinus: roof
Formed by floor of orbit
Parts of Maxillary sinus: floor
Formed by the alveolar part of maxilla
Maxillary sinus drains via _________ into __________.
Maxillary ostium. Middle meatus.
Nerve supply of maxillary sinus
Superior alveolar nerves