Uses of Sleep SpindlesEdit
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. This is why they are defining characteristics (along with K complexes of stage 2 sleep. During deeper stages (3 and 4) subjects are more difficult to awaken (with the exception of the transitory stage 1).
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