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31 Cards in this Set
- Front
- Back
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what percentage of sleep does stage 1 make up
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2-5%
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what percentage of sleep does stage 2 make up
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40-50%
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what percentage of sleep does stage 3 make up
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25%
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what percentage of sleep does stage REM make up
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25%
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What are the physiological effects of REM sleep
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-Dulled reflexes
-irregular heart rate -erratic respirations -altered ability to regulate temperature (no thermal regulation, no sweating, decreased shivering response. |
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0-12 month old children need how much sleep?
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10.5-18 hours
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2-12 year old children need how much sleep?
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14-15 Hours
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12-18 month old children need how much sleep?
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13-15 hours
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18-3 year old children need how much sleep?
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12-14 hours
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3-5 year old children need how much sleep?
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11-13 hours
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5-12 year old children need how much sleep?
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10-11
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Adolescents need how much sleep?
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9.25 hours
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Adults and older persons need how much sleep?
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7-9 hours
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What is Nyquist principle?
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The sampling rate must be at least twice as fast as the fastes frequency that will be recorder.
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What is the ASET standard for sampling rates.
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The sample rate must be three times faster that the HFF setting (can vary from channel to channel.
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What is Aliasing
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the distortion or artifact that results when the signal reconstructed from samples is different than the original continuous signal. Sampling rate to low distorts original image
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What is the time constant?
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The amount of time it takes, in seconds, for the signal to fall to 37% of the original amplitude of a ca calibration signal. Performs the dame function as a low filters.
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Hight cut filter is the same as a?
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Low pass filter
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Low cut fltter is the same as a?
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High pass filter
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What is common mode rejecton?
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A method of prcessing input signals in which any identical voltages are eliminated, while dissimilar voltages are recorded.
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What does G1 represent as it relates to an EEG?
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Exploring electrode
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What does G2 represent as it relates to an EEG?
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Reference electrode
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What are acceptable impedances for an EEG and what are ideal impedances for an EEG
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Acceptable < 10Kohm (10,000ohms)
Ideal <5 Kohm (5,000ohm) |
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What is the formula for calcualting voltage?
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Voltage =sensitivity X pen deflection (V=S X PD)
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What is the frequency of Beta
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>13 Hz
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What is the frequency of alpha?
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8-13 Hz
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What is the frequency of Theta?
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4-7
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What is the frequency of alpha?
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0.5-2 HZ with an amplitude of at least 75uV
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What is the frequency of spindles?
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12-14 Hz at least 0.5 sec long
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What is a vertex wave ?
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Sharp negative wave wihtin theta range frequency
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What is a K complex?
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A sharp negative wave with a slower negative deflection at least 0.5 sec long
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