Flashcards in Nasal cavity and Paranasal Sinuses Deck (53)
What is the nasal diverticulum?
a false nostril; pouch
Where is the nasal diverticulum located?
dorsal to the lamina or alar cartilage
What species is the nasal diverticulum in?
Where is the nasolacrimal duct located in the horse?
within the nostril
At rest, what is the shape of the nostril in the horse?
During activity, what is the shape of the nostril in the horse?
huge and circular shaped
What are the meatuses in the nasal cavity?
dorsal, middle, ventral, common, and ethmoid
What are the nasal chonchae in the nasal cavity?
dorsal, ventral, ethmoidal
What is the ethmoidal conchae also known as?
What is the organization of the bone in the skull?
inner trabecular bone with an external cortical bone (laminal layer) and internal cortical bone (laminal layer)
What does the trabecular bone contain?
What is the trabecular bone also known as?
What part of the bone of the skull becomes the paranasal sinus?
the dipole part
What is a direct paranasal connection?
paranasal sinus is connected to the middle meatus via the nasal maxillary aperture
What is an indirect paranasal connection?
paranasal sinus is connected to another paranasal sinus and that paranasal sinus is connected to the middle meatus
What should a normal healthy paranasal sinus be filled with?
What is the difference between the frontal sinus in the horse and every other species?
it is undivided, whereas it is divided in everything else
What is the frontal sinus connected to in everything but the horse?
the ethmoid meatus
What is the difference between the maxillary sinus in the horse and every other species?
it is divided in the horse, whereas it is undivided in all other species
What is the maxillary sinus connected to in all species?
the middle meatus
What are the divisions of the frontal sinus in the ox?
rotstral frontal sinus and caudal frontal sinus
Which division of the frontal sinus in the cattle is the most clinically relevant and the largest?
the caudal frontal sinus
What are the divisions of the rostral frontal sinus?
lateral rostral frontal, medial rostral frontal, and intermediate rostral frontal
How do the rostral frontal sinus divisions of the ox connect to the ethmoid meatus?
via their own connection
What are the diverticula associated with the caudal frontal sinus?
cornual, nuchal, and post orbital
If an ox has horns, when does the cornual diverticula penetrate the cornual process?
between 4-6 months of age
Where is the nucal diverticula of the caudal frontal sinus in the ox located?
it extends out of the frontal bone into the occipital bone
Where is the post orbital diverticula of the caudal frontal sinus of the ox located?
right behind the eye
What does the maxillary sinus of the ox communicate with?
the middle nasal meatus