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41 Cards in this Set
- Front
- Back
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3 Divisions of the ear |
External, Middle and Internal ear |
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Collects vibration; thin plate of elastic cartilage covered by skin |
Auricle / Pinna |
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What supplies the auricle? |
Facial nerve (Extrinsic and intrinsic muscles) |
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Curved tube from auricle and conducts sound waves |
External auditory meatus |
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These are modified sweat gland that secrete yellowish brown wax |
Ceruminous glands |
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Sensory innervatiob of ext. Auditory meatus |
Auricolotemporal n. Auricular branch of vagus n. |
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Lymph drainage of external auditory meatus |
Supeficial parotid, mastoid, superficial lymph nodes |
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What is the other name for middle ear? |
Tympanic Cavity |
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Air-containing cavity in petrous part of temporal bone |
Tympanic cavity |
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What are the 3 auditory ossicles? (Anterior to posterior) |
Hammer (Malleus) Anvil (Incus) Stirrup ( Stapes) |
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Transmits vibrations of tyMoanic membrane towards the perilymph of internal ear |
Auditory ossicles |
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Auditory ossicles communication with front |
Auditory tube via nasopharynx |
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Auditory ossicle communication with back |
Mastoid antrum |
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Roof of the ear; separates tyMoanic cavity from meninges and temp. lobe of brain in middle cranial fossa |
Tegmen tympani |
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Separates tympanic cavity from internal carotid |
Floor of the tympanic cavity |
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Rounded projection on greater part; underlying 1st turn of concha |
Promontory |
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Thin, fibrous, pearly gray membrane |
Tympanic membrane or eardrum |
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Innervation for tympanic membrane |
Auriculo temporal nerve+auricular branch of vagus |
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Groove in bone where tympani membrane circumference is slotted |
Tympanic Sulcus |
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Small triangular area bounded by folds found in the tymoanic membrane |
Pars flaccida |
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Incus posses large body and 2 processes. Enumerate. |
Body of incus *rounded + articulates w/ the head of malleus
Long process *descends behind & parallel to malleus *lower end bends medially and articulates with the head of stapes Short process *projects backward & attached to posterior wall of tympanic cavity |
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2 muscles of middle ear |
Tensor tympani Stapedius |
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Dampens down vibration of tympanic membrane |
Tensor tympani |
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Dampens down vibration of stapes |
Stapedius |
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True or False. Motion is communicated to perilymph in scala vestibuli |
True |
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What connects the ant wall of tympanic cavity and nasal pharynx? It equalizes air pressure in tympanic cavity |
Auditory tube |
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When do mastoid air cells begin to develop |
2nd year of life |
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Where does Tympanic nerve arise? |
From glossopharyngeal nerve below jugular foramen |
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Forms from branches and supplies lining of middle ear |
Tympanic plexus |
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This division of the ear can be found in the petrous temporal bone, medial to middle ear |
Internal ear/Labyrinth |
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Cavities in dense bone; lined by endosteum and contains perilymph |
Bony labyrinth |
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Central, posterior to cochlea and anterior to senicircular canalsl |
Vestibule |
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Open into posterior vestibule |
Semicircular canals |
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Swelling at the end of canal in semicircular canals. |
Ampulla |
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Snail shell and open into anterior vestibule |
Cochlea |
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At right angles to each other |
Semiciurcular ducts |
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Triangular. Connected to saccule via ductus reunins |
Ducts of cochlea |
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Recurrent dizziness |
Miniere's syndrome |
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Usually caused by untreated actute otitis media (middle ear imfection) |
Mastoiditis |
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A group of inflammatory diseases in the middle ear |
Otitis media |
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Tube connected with the nasopharynx |
Eustachean tube |
