sinuses

the sinuses

large air filled cavities lined with mucous membranes and are divided into 4 groups

-maxillary x2

-frontal x2

-ethmoid many

-sphenoid 1 or 2

what are the 4 sinus groups?

the maxillary sinus

what sinus is visible at birth?

fetus

sinuses start developing in the?

6 or 7

the frontal and sphenoid sinuses can be seen around the age __________

the ethmoid sinus

what sinus is last to develop?

late teen years

all sinuses are fully developed by the?

nasal cavity

all sinuses communicate with each other and the?

the maxillary sinuses

-the largest sinus

-one in each maxillary bone

-vary in size

pyramid and cubic

the maxillary sinus is shaped like a __________ on a fontal view and lateral looks ________

opening into the middle nasal meatus passageway

what is the site of communication of the maxillary sinus?

shape and size

the maxillary sinuses are always paired fairly uniform in ________ and _____

fontal sinus

located between the inner and outer tables of the skull and posterior to the glabella is the?

rarely

the fontal sinuses are _________ uniform in shape and size

septum

the two cavities of the frontal sinuses are separated by the?

men

do men or women have a larger frontal sinus?

the ethmoid sinuses

what sinus is within the lateral labyrinths of the ethmoid bone?

anterior, middle, and posterior and all intercommunicate

the ethmoid sinus is grouped into?

orbits

the ethmoid sinus is medial to the walls of the?

the sphenoid sinuses

lie in the body of the sphenoid bone directly below the sella trice is called?

divided

like the ethmoid the sphenoid sinus is _________ by the septum

floor

the sphenoid sinus lies closer to the _______ of the cranium which sometimes results in sphenoid effusion

a basal skull fracture

sphenoid effusion is evidence of?

ostium

sphenoid sinuses drain into the back of the throat through an opening called the?

a lateral view

what position is the only one done without superimposition?

osteomeatal complex

the communication between the sinuses make up the?

sinusitis

when the sinuses cannot drain it results in?

1: infundibulum drains into

2: middle nasal meatus which drains sown into

3: inferior nasal meatus and exits the body through the nasal orifice

the maxillary sinuses drain into the following?

nasal orifice

the ethmoid bulla receives drainage from the ethmoid and frontal sinuses which then drain into the middle nasal meatus, then into INM and exits the body through the

-squamous portion

-mastoid portion

pertrous portion

each temporal bone is divided into 3 portions:

petrous portion

the organs of hearing and balance are the main structure found within the?

-external

-middle

-internal

the ear has 3 important parts

auricle or pinna

the external ear starts with the _______ or _______ on each side of the head, along with the tragus

canal

the external auditory meatus includes the?

EAM

the mastoid tip is posterior and inferior to the?

styloid process

the ____________ is inferior and slightly anterior to the EAM

tympanic membrane

the canal narrows slightly as it meets the?

the ear drum

the tympanic membrane is also known as?

middle ear

irregularly shaped, air containing cavity that is between the external and internal ear?

-tympanic membrane

-auditory ossicles

-tympanic cavity

what are the three parts of the middle ear?

-tympanic cavity proper

-attic

what are the two parts of the tympanic membrane?

the drum crest

a sharp bony projection which separates the EAM from the attic is called?

the tympanic cavity

communicates anteriorly with the nasopharynx by way of the eustachian tube is called?

the middle ear

serves as a way to equalize pressure from within the middle ear tot he outside ear, ears popping is the middle ear equalizing to prevent damage to the ear drum is called?

4 cm

the Eustachian tube is a passageway between the middle ear and the nasal pharynx about _____ long

mastoid air cells

a second direct communication into the middle ear occurs posteriorly to the?

the aditus

opening between the attic and the mastoid portion of the temporal bone is called?

the antrum

large chamber which connects with the aditus, the antrum also connects with the various mastoid air cells is called?

tegmen tympani

a thin plate of bone preventing infection to spread into the brain is called?

three small bones of the middle ear

what are the auditory occicles?

-malleus

-incus

-stapes

what are the auditory occicles called?

the stapes

smallest shaped like stirrups, connected to a membrane called the oval window which leads to the inner ear is called?

the inner ear

what contains the sensory apparatus of both hearing and equilibrium?

-osseous/ bony labyrinth

-membranous labyrinth

the inner ear is divided into two parts

the osseous/bony labyrinth

houses the membranous labyrinth is called?

the membranous labyrinth

a series of communicating ducts and sacs is called?

-cochlea

-vestibule

-semicircular canals

the osseous or bony labyrinth is divided into three parts

round window

base of the cochlea?

oval window

vestibule contains the?

hearing

the cochlea relates to the sense of?

-superior

-posterior

-lateral

what are the three semicircular canals?

equilibrium/balance

canals can relate to the sense of direction or