4 Hz Deep Theta Frequency

θ波 (Theta band) 頻率於4-8Hz之間，振幅約30-60uV，大多出現於幼童時期或是成人半睡半醒的狀態以及意識靜止的冥想放鬆狀態之間。 是一種適於測量低焦慮、低恐懼狀態下的連續性專注指標，也是自我需求管理的內部神經指標。

The dentate gyrus also generates theta waves, which are difficult to separate from the CA1 waves because they are considerably smaller in amplitude, but there is some evidence that dentate gyrus theta is usually about 90 degrees out of phase from CA1 thet

二、潛意識 (Theta波)，例如：有時候會感到情不自禁就…、不知不覺就…； 三、意識與潛意識橋梁 (Alpha波)，即放鬆的專注，此波的高低反映在精神狀態上；

These electrical voltages help our brains reach certain states 1, from focused to relaxed. Theta brain waves happen during a drowsy yet still awake period. Here's what you need to know about theta waves, including their relationship with sleep, and ho

θ波是指持續時間為1/8-1/4秒的一種 腦電波 成分。 把頻率為4-8 赫茲 的腦電波 節律 稱為θ節律（θ rhythm）。 正常成人腦電圖一般混有少量θ波，其頻率為4~7次/s，波幅20~40微伏，呈散在性分布，主要見於額、顳部，指數小於20%，其他部位指數小於10%。 而電壓較高的θ波見於成年人時多屬病理性。 θ波是人腦電波的基本波形之一。 頻率為4~7赫茲，振幅為100～150微伏。 當人睏倦時可見，一般表示中樞神經系統進入

Theta oscillations appear as traveling waves propagating along the septotemporal axis of the hippocampus. These oscillations synchronize neuronal activity across distant sites, including the hippocampus and neocortex, and are organized both temporally and