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* Optimal: Relaxation | * Optimal: Relaxation | ||
* Increase alpha waves: Alcohol, relaxants, some antidepressants<ref>[http://mentalhealthdaily.com/2014/04/15/5-types-of-brain-waves-frequencies-gamma-beta-alpha-theta-delta/ Mental Health Daily]</ref> | * Increase alpha waves: Alcohol, relaxants, some antidepressants<ref>[http://mentalhealthdaily.com/2014/04/15/5-types-of-brain-waves-frequencies-gamma-beta-alpha-theta-delta/ Mental Health Daily]</ref> | ||
==Beta Waves== | ==Beta Waves== |