He explains that brainwaves come in four varieties of respectively lower frequency--Beta, Alpha, Theta and Delta waves. Beta waves are generated by the brains of adults when fully awake. Alpha waves are produced by the brains of young children. Theta waves are generated as we enter sleep and while we dream.
他解釋，腦細胞由腦波的電力能源來運作，腦波以不同的波長由密集到緩和分為 β、α、θ、δ 四種；成人清醒時出現的是 β 波，幼兒的腦波為 α 波，θ 波則為即將進入睡眠時產生，作夢時也是此種腦波，δ 波在熟睡中出現。