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| A measure of how much of signal is lost when a sinusidal wave form is passed through a circuit. |
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| is measured in Ohms (named after George Simon Ohms) |
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| For sleep studies the electrode impedance |
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| The epoch for scoring sleep stages |
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| the amount of voltage measured, usually in microvolts(uV) |
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| is measured by how tall a wave is on a polysomnogram. |
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| The number of cycles of signal in a fixed period of time (usually 1 second). The number of cycles per second is the frequency in Hz (in honor of Heinrich Hertz). The frequency is the inverse of duration (1?duration). |
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| the shape of the waveform, which can be smooth and sinusoidal (like a sine wave) or sharp, regular (each wave looks the same) or irregular |
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| means the location on the scalp that is the origin of an EEG signal. |
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amplitude- not used
frequency - 8-13 Hz
Waveform - Sinusoidal
Distribution- Occipital |
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Amplitude-not used
Frequency-0.5-2Hz
Waveform-Vertical
Distribution-EOG Channels |
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| are part of the scoring criteria for R sleep. |
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