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Definition
| composed primarily of the auricle and the external acoustic meatus |
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Definition
| skin-covered cartilaginous structure encircling the auditory canal opening |
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| portion of the auricle lying inferior to the external auditory canal |
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Definition
| short, narrow chamber carved into the temporal bone. Contains ceruminous glands. |
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Definition
| wax secreting glands located in the external acoustic meatus |
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Definition
| eardrum; vibrates at exactly the same frequency as the sound waves hitting it; separates the external from the middle ear. |
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Definition
| small chamber found within the temporal bone; the cavity is spanned by the auditory ossicles. |
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Definition
| three small bones: malleus, incus, and stapes. articulate to form a lever system that amplifies and transmits the vibratory motion of the eardrum to the fluids of the inner ear via the oval window |
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Definition
| connects the middle ear chamber with the nasopharynx; equalizes the pressure of the middle ear cavity with external air pressure |
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Term
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Definition
| inflammation of the middle ear |
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Definition
| contains the osseous labyrinth and membranous labyrinth |
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Term
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Definition
| Bony, rather tortuous chambers filled with aqueous fluid called perilymph |
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Term
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Definition
| aqueous fluid that fills the osseous labyrinth |
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Definition
| system that mostly follows the contours of the osseous labyrinth; filled with a more viscous fluid called endolymph |
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Definition
| viscous fluid that fills the membraneous labyrinth |
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Definition
| situated between the cochlea and semicircular canals; involved with equilibrium |
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Definition
| involved with equilibrium; a subdivision of the bony labyrinth; oriented in three planes: horizontal, frontal, and sagittal |
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Term
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Definition
| snail-like; contains the sensory receptors for hearing |
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Term
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Definition
| cochlear membrane that is a soft wormlike tube about 3.8 cm long; it winds through the full two and 3-quarter turns of the cochlea and separates the perilymph; supports the spiral organ (of Corti) |
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Term
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Definition
| terminates at the oval window, which seats the foot plate of the stirrup located laterally in the tympanic cavity; upper region. |
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Definition
| bounded by a membranous area called the round window; lower region |
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Definition
| contains the receptors for hearing - the sensory hair cells and nerve endings of the cochlear nerve |
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Term
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Definition
| a division of the vestibulocochlear nerve (VIII) |
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Definition
| the hair (auditory receptor) cells rest on this, which forms the floor of the cochlear duct |
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Term
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Definition
| endolymph-filled chamber of the cochlear duct |
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Term
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Definition
| type of sensorineural deafness |
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Definition
| equilibrium apparatus; is in the vestibule and semicircular canals of the bony labyrinth |
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Definition
| communicates with the utricle of the vestibule |
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Definition
| consists of a tuft of hair cells covered with a gelatinous cap |
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Definition
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Definition
| respond to gravitational pull; located on the walls of the saccule and utricle |
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Definition
| gelatinous material containing small grains of calcium carbonate (otoliths) |
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Term
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Definition
| involuntary rolling of the eyes in any direction or the trailing of eyes slowly in one direction, followed by their rapid movement in the opposite direction |
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Term
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Definition
| sensation of dizziness and rotational movement when such movement is not occurring or has ceased |
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Term
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Definition
| determines the integrity of the dorsal white column of the spinal cord |
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