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Anatomy of Sinuses
Terms in this set (28)
What are the 4 types of sinuses?
frontal, maxillary, ethmoid, sphenoid
Air-filled cavities that are mucus-lined chambers that begin to form during fetal development as small sacs that continue to grow
all sinuses are adjacent to and communicate with the _____ _____
What are the functions of sinuses?
- to lighten total weight of skull
- warm and humidify air before it passes into lungs
- Intensify resonance of voice tone
______ sinuses can be demonstrated radiographically at birth.
what age will frontal and sphenoidal sinuses be distinguished from what will become air cells
______ air cells develop during puberty, and are not completely developed until age 17-18 years old
What is the largest sinus?
Which sinus is located in the body of each maxillae, just lateral to nasal wall and posteriorly to cheek?
What is another name for maxillary sinus?
"Antra of Highmore"
The maxillary sinus is ____ in shape
apices project laterally and inferiorly so that the roots of the upper teeth are in close proximity to the _____ floor. As a result, an infection of an upper tooth can spread to _____ _____.
antral ; maxillary sinus
What is the second largest sinus?
where is the frontal sinus located?
behind glabella in squamoosal portion of frontal bone
What causes sinuses to rarely be symmetric?
Intersinus septum-deviated from midline
In some cases, _____ sinuses can be absent altogether.
Which sinus is situated between nasal cavity and each orbit?
Ethmoid sinus: cells divided into what 3 small groups?
anterior, middle, posterior
Cells located in ____ _____ of ethmoid bone.
Number of cells in ethmoid sinus vary per group and individual ranging from ___-____
______ sinus may or may not be paired. Frequently one, but never more than 2
where is the sphenoidal sinus located?
in body of sphenoid bone, directly below sella turcica
The sphenoidal sinus extends from area of posterior ethmoidal air cells to ____ _____
Because of proximity to base of skull, blood or cerebrospinal fluid may seep through a ____ ____ fracture into sinus
Which projection of the skull will demonstrate air-fluid level in sinus?
cross-table lateral skull
sinuses are ALWAYS done _____ with horizontal beam = for air-fluid level
commonly heavy semigelatinous material that clings to walls of sinuses
How long should you wait between projections of sinuses to allow exundate to gravitate to desired location before exposure is made.
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