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Different Categories of Brain waves and their frequency range

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Frequency range Name Generally related to: > 40 Hertz Gamma waves Increased mental activity like fear, consciousness, perception 13-39 Hertz Beta waves Active concentration and Anxious thinking, paranoia, cognition, arousal. 7-13 Hertz Alpha waves Pre-wake drowsiness, pre-sleep drowsiness, Dreams, REM sleep. 4-7 Hertz Theta waves NREM sleep, relaxation or deep meditation. < 4 Hertz Delta waves Loss of consciousness of […]