Term
| what are the major parts of the ear |
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Definition
| external, middle or tympanic cavity, internal or labrynth |
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Term
| what part of the ear contains the organs for hearing and balance |
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Definition
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Term
| what are the main parts of the external ear |
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Definition
| pinna, external audutiry meatus |
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Term
| what is the auricle or pinna shaped in the way it is |
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Definition
| because it collects air vibrations |
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Term
| what is the auricle made of |
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Definition
| thin plate of elastic cartilage covered by skin |
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Term
| where does the external auditory meatus extend to and from |
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Definition
| auricle ro tympanic membrane |
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Term
| what is the function of the auditory meatus |
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Definition
| conduct sound waves from the auricle to the tympanic membrane |
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Term
| what is the outer 1/3 of the auditory meatus made of |
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Definition
|
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Term
| what is the inner 2/3 of the auditory meatus made of |
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Definition
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Term
| what lines the auditory meatus |
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Definition
| skin and hairs, sebacous glands, cerminous glands |
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Term
| what nerve supplies sensory to the lining of the auditory meatus |
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Definition
| auriculotemporal and auricular branch of vagus |
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Term
| where does lumph from the external ear drain |
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Definition
| superificial parotid, mastoid, and superificial cervical nodes |
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Term
| to properlly view the tympanic membrane what needs to be done in an adult |
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Definition
|
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Term
| to properlly view the tympanic membrane what needs to be done in an child |
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Definition
| pull auricle back and down |
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Term
| describe the apperance of the tympanic membrane |
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Definition
|
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Term
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Definition
| the depression in the center of the tympanic membrane |
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Term
| what is the middle ear filled with |
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Definition
|
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Term
| what bone is the middle ear in |
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Definition
| pterous portion of temporal bone |
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Term
| what lines the middle ear |
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Definition
| mucous membrane that has auditory ossicles |
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Term
| what does the auditory tube connect |
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Definition
| middle ear in front with nasopharynx and behind with mastoid antrum |
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Term
| what is another name for the auditory tube |
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Definition
| pharyngotympanic tube, eustachian tube |
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Term
| what forms the roof of the middle ear |
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Definition
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Term
| what is the tegman tympani part of |
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Definition
| the petrous temporal bone |
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Term
| what does the tegman tympani seperate |
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Definition
| tympanic cavity from temporal lobe and its meninges |
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Term
| what forms the floor of the middle ear |
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Definition
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Term
| what does the thin bone forming the floor of the middle ear seperate |
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Definition
| tympanic cavity from superior bub of internal jugular bein |
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Term
| what opens into the anterior wall of the tympanic cavity |
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Definition
| auditory tube and tube of tensor tympani |
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Term
| describe the posterior wall of the middle ear |
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Definition
| aditus opening, pyramind projection |
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Term
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Definition
| opening to the mastoid antrum in the posterior wall of the middle ear |
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Term
| describe the medial wall of the middle ear |
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Definition
| promontory projection, above and behind is the fenestra vestibulii opening, below and behind is the fenestra cochleae |
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Term
| what causes the promontory |
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Definition
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Term
| what forms the lateral wall of the middle ear |
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Definition
| tympanic cavity, concave lateral |
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Term
| what are the names of the auditory ossicles |
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Definition
|
|
Term
| what is the largest auditory ossicle |
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Definition
|
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Term
| what attaches to the medial surface of the tympanic membrane |
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Definition
|
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Term
| what does the malleus articulae with |
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Definition
|
|
Term
| what does the incus articulate with |
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Definition
|
|
Term
| where does the base of foot plate of the stapes sit |
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Definition
| on fenestra vestivuli or oval window |
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|
Term
| what muscles are associated with the ossicles |
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Definition
| tensor tympani and stapedius |
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Term
| what is the origin of the tensory typmani |
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Definition
| wall of the auditory tube and its own canal |
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Term
| what is the insertion of the tensor tympani |
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Definition
|
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Term
| what is the innervation of the tensor tympani |
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Definition
|
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Term
| what is the action of the tensor tympani |
|
Definition
| dampen vibrations of the tympanic membrane |
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|
Term
| what is the origin of the stapedius |
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Definition
| pyramid on the posterior wall of middle ear |
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|
Term
| what is the insertion of the stapedius |
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Definition
|
|
Term
| what is the innervation of the stapedius |
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Definition
|
|
Term
| what is the action of the stapedius |
|
Definition
| dampen vibrations of the stapes |
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|
Term
| what does the auditory tube connect |
|
Definition
| anterior wall of the tympanic cavity to the nasopharynx |
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|
Term
| what is the posterior 1/3 of the auditory tube made of |
|
Definition
|
|
Term
| what is the anterior 2/3 of the auditory tube made of |
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Definition
|
|
Term
| what does the auditory tube pass over |
|
Definition
| upper border of the superior constrictor |
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|
Term
| what is the function of the auditory tube |
|
Definition
| pressures the middle ear with atmospheric pressure |
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|
Term
| where is the mastoid antrum located |
|
Definition
| behind the middle ear in the ptrous portion of the temporal bone |
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Term
| how does the mastoid antrum communicate with the middle ear |
|
Definition
|
|
Term
| what does the mastoid antrum communicate with |
|
Definition
| mastoid air cells and aditus |
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|
Term
| where are the mastoid air cells located |
|
Definition
| within the mastoid process |
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|
Term
| what are the mastoid air cells continous with |
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Definition
|
|
Term
| what are the mastoid air cells lined with |
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Definition
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|
Term
| where does the facial nerve enter the facial canal |
|
Definition
| the bottom of the internal auditory meatus |
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|
Term
| describe the path of the facial nerve to the geniculate ganglion |
|
Definition
| runs lateral above the vestibule of the inner ear until it reaches the medial wall of the middle ear |
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|
Term
| where does the facil nerve bend sharple backward int he ear |
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Definition
|
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Term
| what does the facial nerve do when it arrives at the posterior wall of the middle ear |
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Definition
| curves down on the medial side of the aditus of the mastoid antrum |
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Term
| where does the facial nerve give off a branch to the stapedius muscle |
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Definition
|
|
Term
| what is the bend in the facial canal called |
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Definition
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|
Term
| after branching for the stapedius, where does the facial nerve go |
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Definition
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|
Term
| what arises from the facial nerve after the stylomastoid foramen |
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Definition
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Term
| describe the path of the chorda tympani |
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Definition
| enters the middle ear close to the border of the tympanic membrane and crosses the handle of the malleus, it exits the middle ear through the petrotympanic fissure to enter the infratemporal fossa to joint the lingual nerve |
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Term
| what fibers does the chorda tympani contain |
|
Definition
| taste and preganglionic parasympathetic fibers |
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|
Term
| what does the chorda tympani innervate |
|
Definition
| anterior 2/3 of the tounge (taste), and the submandibular gland (parasympathetic) |
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Term
| where does the tympanic nerve begin |
|
Definition
| branches off the glossopharyngeal nerve just below the jugular foramen |
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Term
| describe where the tympanic nerver enters the middle ear, then what does it do |
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Definition
| passes through the floor and onto the promontory where it splits into branches forming the tympanic plexus |
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|
Term
| what does the tympanic plexus supplu |
|
Definition
| mucosa of th emiddle ear and gives off the lesser petrosal nerve |
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|
Term
| what contains the preganglionic parasympathetic fibers destined for the otic ganglion |
|
Definition
|
|
Term
| where does the lesser pterosal nerve exit the middle ear |
|
Definition
| through a small caniculus in the roof |
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|
Term
| where does the lesser pterosal nerve exit the skull then where does it end |
|
Definition
| through the foramen ovale and joins the otic ganglion |
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|
Term
| what is the entire outer ear projection called |
|
Definition
|
|
Term
| what is the top of the ear called |
|
Definition
|
|
Term
| what is the curve on the medial portion of the ear called |
|
Definition
|
|
Term
| what is the little projection of skin above the external auditory meatus |
|
Definition
|
|
Term
| what is the function of earwax |
|
Definition
| lubricate tympanic membrane |
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|
Term
| is the autidory tuve usually open of closed |
|
Definition
|
|
Term
| why does hte auditory tube usually stay closed, what happens if it doesnt |
|
Definition
| passage for mucous, infection can erode bone, many times it gets into mastoid air cells and needs to be operated on |
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