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13 Cards in this Set
- Front
- Back
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Auditory System
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Sense of hearing, audition. A person can detect sound and perceive and interpret nuances.
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Vestibular system
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A sense of balance. Of knowing head and body location as well as head and body movements
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Sound
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is caused by audible variations in air pressure
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Cycle
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distance between successive compressed patches
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Sound Frequency
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number of cycles per second expressed in units called Hertz
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Pitch
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Can either be high or low
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Intensity
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The difference in pressure between compressed and rarefield patches of air. The range can be 20 hertz to 20,000 hertz
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The Auditory Pathway Structures in Stages
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Sounds Waves Tympanic Membrane, Ossicles, Oval Window Cochlea fluid, Sensory Neuron response followed by brain stem nuclei output
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Brain Stem Nuclei Output pathway?
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To MGN in the thalamus to the primary auditory cortex A1
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The sound force amplifications by ossicles
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Is caused by the pressure forced by surface area. The greater pressure at the oval window than the tympanic membrane, will move the cochlea fluid.
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The Attenuation Reflex
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Response to where onset of loud sound causes tensor tympani and stapedius muscle contraction.
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The function of the Attenuation Reflex is to
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adapt ears to loud sounds and understand speech better.
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The components of the middle ear are
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Malleus , Incus Stapes, Auditory Canal Tympanic Membrane , Footplate of staples at oval window , cochlea, Eustarian tube,
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