Answer
Answer
See the list below:
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Spindles are groups of waves that occur during many sleep stages but especially in stage 2.
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They have frequencies in the upper levels of alpha or lower levels of beta.
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Lasting for a second or less, they increase in amplitude initially and then decrease slowly. The waveform resembles a spindle.
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They usually are symmetric and are most obvious in the parasagittal regions.
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Media Gallery
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Examples of alpha, beta, theta, and delta electroencephalography frequencies.
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Example of a K complex.
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Example of either lambda or positive occipital sharp transients of sleep (POSTS).
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Example of mu waveforms.
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Example of small sharp spikes, also known as benign epileptiform transients of sleep (BETS).
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