Special Senses Flashcards
Which scala of the cochlea are filled with perilympth?
The scala vestibuli and scala tympani
Which scala of the cochlea are filled with endolymph?
The scala media
Which part of the cochlea is responsible for localizing high and low frequency sounds?
the basilar membrane
In which part of the basilar membrane would high frequency sounds be localized?
the bottom of the cochlea
What is conductive hearing loss?
Hearing loss originating in the middle or outer ear
What is sensorineural hearing loss?
Hearing loss originating in the inner ear
What are common causes of sensorineural hearing loss?
Lesions of CN VIII, ototoxic agents, hair cell loss, presbycusis, or a connexin mutation
What is Otitis Media?
Infection of the middle ear, caused by bacteria from the nasopharynx traveling though the eustachian tube
What are the two vestibular organs?
the utricle and the saccule
What is contained in the macula of the utricle and saccule?
columnar mechanoreceptor cells
What are two primary causes vertigo?
Overstimulation of the maculae in the utricle, or the cristae ampullaris of the semicircular canals
Which olfactory cell type is responsible for replacement of olfactory receptor neurons as they die?
basal cells
