Term
The ECochG enhances our ability to see wave __ well. ___ ___ scews our ability to see summating potential response. So in order to get a good response we have to ___ the cochlear microphonic (CM)
-CM changes ___ when we change our ___. It ___ what our polarity is set to so to eliminate that you do an ___ polarity which doesn't effect the rest of our response.
-With ANSD when you use alternating polarity, this response ___ |
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Definition
| 1; Cochlear Microphonic; eliminate; polarity; polarity; mirrors; alternating; disappears |
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Term
| What is the main reason we run an ECochG? |
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Definition
| To look for Meniere's disease |
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Term
| This looks at the phase of the sound that you are providing; mimics polarity |
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Definition
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Term
| This is known as the outer and inner hair cell response |
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Definition
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Term
| This response mainly looks at the inner hair cell response |
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Definition
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| If the morphology is poor then... |
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Definition
| move the electrodes closer to the site |
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Term
| You don't get a response until the stimulus is about ___ dB HL |
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Definition
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Term
Parameters:
-SP isn't clear until it's an alternating ___
-___ placement and ___ type have a huge impact on the response |
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Definition
| click; Electrode; stimulus |
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Term
Analysis Time:
-Typically __ to __ ms used for ECochG
-Minimum of ___ data points distributed across this time period
-Temporal resolution (time in-between two sample points) is ___ ms or shorter
-Brief analysis time (5 ms) often preferred to eliminate ___ latency ___ amplitude components (unless trying to also record ABR at the same time)
-Latency of AP component is ___ for low frequency stimuli presented at reduced effective intensity levels – may require ___ analysis time window |
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Definition
| 5 to 10; 512; 0.02; later; larger; prolonged; longer |
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Term
| ___ time window because if you keep recording you will get ABR results which will obscure the recording. Because the responses are larger for the later responses because ___ neurons are being activated-later responses are thought to be ___ responses |
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Definition
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Term
ECochG Stimulus Protocol:
-Transducer: ___
-Type: ___
-Duration: ___ ms
-Polarity: ___
-Rate: ___ seconds
-Intensity: ___ to ___ dB nHL
-Masking: ___
-Presentation: ___/___ |
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Definition
-ER-3A
-Click
-.1
-Alternating
-7.1
-70-90
-None
-ear/mode |
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Term
| If you are only doing a click with someone with a noise induced HL you will have a hard time getting a response so you may want to use a ___-___ |
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Definition
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Term
| Why don't we need to mask? |
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Definition
| Because it wouldn't generate a response when it crosses over. |
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