FACTOID # 156: Tax makes up half of the of Gross Domestic Product in Denmark and Sweden. In Japan and the United States, it makes up less than 30%.
 
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Encyclopedia > Sleep spindle

A Sleep spindle is burst of brain activity visible on an EEG that occurs during stage 2 sleep. It consists of 12-16 Hz waves that occur for 0.5 to 1.5 seconds. Electroencephalography is the neurophysiologic measurement of the electrical activity of the brain by recording from electrodes placed to the scalp, or in the special cases on the cortex. ... A girl quietly at sleep Sleep is the fundamental anabolic process common to all life forms, plant and animal. ...


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Sleep spindle - Wikipedia, the free encyclopedia (136 words)
A Sleep spindle is burst of brain activity visible on an EEG that occurs during stage 2 sleep.
Sleep spindles are one of several measures employed by the brain to keep a sleeper in an unconscious state.
This pattern is produced during sleep to inhibit the processing of unnecessary information, which would especially interrupt stage 2 sleep.
NREM - Wikipedia, the free encyclopedia (315 words)
Dreaming is rare during NREM sleep, and the muscles are not paralyzed as in REM sleep.
EEG recordings tend to show characteristic "sleep spindles" and "K-complexes" during this stage.
Sleep spindles in the stage 2 figure are underlined in red.
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