Term
| what nerve does the lesser petrosal nerve branch off of? |
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Definition
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Term
| the middle ear is connected to the ____ aka ____ tube and the ____ ___, that leads to the mastoid air cells. |
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Definition
- auditory/pharyngotempanic tube
- mastoid antrum |
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Term
| the mastoid air cells are lined with the same ___ that lines the middle ear. |
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Definition
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Term
| the vestibule is a ___ ___ that receives the ends of the ___ canals and contains the ___ and ___. |
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Definition
- central chamber
- semicircular
- utricle
- saccule |
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Term
| the utricle communicates with the saccule through the _____ duct. |
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Definition
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Term
| The saccule is continuous with the ___ duct through the __ ____. |
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Definition
- cochlear duct
- ductus reunions |
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Term
| The utricle and saccule have specialized areas of sensory epithelium called the ____. |
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Definition
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Term
| the maculae of the utricle is in the ___ of the utricle, while the maculae of the saccule is vertical on the ___ wall of the saccule. |
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Definition
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Term
| hair cells in maculae are supplied by what nerve? |
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Definition
| - vestibular part of CN VIII |
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Term
| hair cells in maculae are supplied by what nerve? |
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Definition
| - vestibular part of CN VIII |
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Term
| each semicircular canal has an ampulla at one end. And each ampulla has a sensory area called the ____ ____. This area is a sensor for movements of the ___ when the head is rotated in the plane of the duct. |
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Definition
- ampullary crest
- endolymph |
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Term
| what contains the round window? |
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Definition
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Term
| the auditory receptor, the __ __ ___, lies on the ___ membrane and is suspended between what two things? |
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Definition
- organ of corti
- basilar membrane
- b/w spiral ligament and osseous spiral lamina |
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Term
| The ___ membrane is a gelatinous substance that lies on the apex of hair cells of the organ of corti. |
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Definition
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Term
| tectorial membrane rests of stereocilia of inner and outer hair cells |
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Definition
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Term
| all rows of hair cells are adjacent to __ ___ cells. |
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Definition
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Term
| each outer hair cell extends a bundle of 50-150 ___ from their ___ surface. |
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Definition
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Term
| By movement of the basilar membrane and organ of Corti the stereocilia of hair cells become disturbed and depolarization of the hair cells results |
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Definition
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Term
| hair cells are suspended by ___ cells, so hair cells do not actually rest on the basilar membrane. |
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Definition
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Term
| outer and inner pillar cells are tall cells with wide __ and ___ ___. these cells are attached to the ___ ___. |
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Definition
- bases
- apical ends
- basilar membrane |
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Term
| The ___ tunnel formed by __ and ___ __ cells separates the ___ ___ cells from the ___ __ cells. |
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Definition
- inner tunnel
- outer and inner pillar cells
- outer hair cells
- inner hair cells |
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Term
| The ___ ___ cells are tall ___ cells that are attached to the __ membrane. these support hair cells. |
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Definition
- outer phalangeal
- columnar
- basilar |
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Term
| the spiral ganglion is found within the ____. |
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Definition
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Term
| processes of the ___ neurons in the spiral ganglion extend into the ___ ___ ___, enter the ___ ___, and synapse in the __ and ___ ___ cells. |
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Definition
- bipolar
- osseous spiral lamina
- basilar membrane
- inner and outer hair cells |
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Term
| The cochlear nerve is composed of fibers from the spiral ganglion which bifurcate as they enter the cochlear nuclei |
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Definition
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Term
| The vestibular nerve arises from bipolar cells in the vestibular ganglion. |
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Definition
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Term
| the central fibers of cnVII enter the ____ between the ___ body and spinal tract of the ___ nerve. |
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Definition
- medulla
- restiform
- trigmeninal (CNV) |
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Term
Sound waves carried by the external ear are translated into mechanical vibrations of the tympanic membrane.
These vibrations are transferred to the ear ossicles, which in turn generate a wave at the oval window of the cochlea.
Sound waves generated at the oval window are transferred to the scala vestibuli of the cochlea.
The wave passes to the scala tympani via the helicotrema to the round window. |
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Definition
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Term
| In the helicotrema, the wave in the perilymph of the scala tympani causes movement of the basilar membrane and organ of Corti. |
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Definition
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