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Auditory Physiology - Klapstein
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Membranous labyrinth containing endolymph.
_____ tones: medial part of the gyrus in tonotopic map.
______ deafness: impairment of sound transmission prior to cochlea. Cerumen, perforation, sclerosis of ossicles.
Contains the spiral ganglion with cell bodies of the cochlear nerve.
Ossicle that attaches to Tympanic membrane
Rinne Test: in Sensorineural hearing loss, air conduction is better, but hearing is _______ in affected ear.
______ labyrinth is filled with endolymph. Low Na, High K.
Ossicle that is attached to oval window of cochlea
A gelatinous mass which assists the mechanical transduction by the hair cells.
______ membrane: divide scala vestibuli and scala media.
Perception of sound in absence of external source.
Bending the stereocilia bundle toward the tallest stretches the tip link and opens a cation channel in stereocilia. K+ enters and ______ the hair cell & firing rate in CN8 increase
Muscle on the handle of the malleus. Motor innervation from CN5. Decreases sound transmission.
A disorder of the inner ear in which circulation of endolymph is impeded resulting in swelling (hydrops) of the membranous labyrinth. Vertigo, tinnitus, fullness in ear, hearing lo
Muscle on the neck of stapes. Motor innervation from CN7. Decreases sound transmission.
Rinne Test: in Conductive hearing loss, _______ conduction is better than air.
Most spiral ganglion receive their input only from _____ hair cells.
Name a cause of Tinnitus.
aminoglycosides, cisplatin, aspirin, quinine
Lies within the scala media and contain hair cells which transduce sound into neural signals
______ deafness: impairment of the cochlea or auditory nerve. Exposure to loud sounds, meningitis, drugs, trauma, meniere.
Very slow pressure changes will dissipate through the _______ with little effect on the basilar membrane.
_____ of cochlea: narrow and stiff. more sensitive to higher frequencies.
Communicate at the apical end via the helicotrema. Contain perilymph.
Amplified basilar vibration that can be detected by placing a very sensitive microphone sealed in the external auditory canal.
Weber Test: in Sensorineural hearing loss, tone is ______ on normal side
_______ labyrinth is continuous with subarachnoid space and is filled with perilymph which is similar to CSF. High Na, Low K.
_____ of cochlea: wider and floppier. lower frequencies
Weber Test: in Conductive hearing loss, tone is louder on ______ side
Serve as a compound lever which can amplify sound waves between the tympanic membrane and the oval window of cochlea
_____ tones: lateral part of the gyrus in tonotopic map
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