Yoga Nidra takes you through all four of your natural brainwave patterns as you explore this process of deep yoga relaxation that approximates deep sleep.
Yoga Nidra not only approximates deep sleep it guides you along the same brainwave pathway that happens when you go from your waking state of beta brainwaves, then fall through the reverie of alpha brainwaves and stabilize into the delta brainwave pattern of deep sleep.
Although a session of yoga nidra may be just 30 minutes or so it provides the deep rest, restoration and other widespread health and wellness benefits associated with deep sleep because you brain actually naturally drops into this deepest brainwave pattern in the early stages of entering the sleep state. In some sessions your brainwave activity may actually increase from the slowest delta range to the rem stage associated with dreaming.
In all cases the four brainwave patterns are available to you together with the four states of consciousness associated with them and your four brainwave patterns may be likened to the four states of matter. For example you know that water can be solid as ice, liquid as liquid water, gas as water vapor and in the plasma state as ionized water and that the distinction of each state or stage is dependent on the rate of vibration. In the same way the distinction in your brainwave activity and the corresponding stage of consciousness is directly related to the vibratory rate of your brain’s activity.
In this light the extraordinary impact of Yoga Nidra is that in addition to all of the health, wealth and creative benefits it provides it is also a means for you to explore these distinct stages of consciousness knowingly. In other words what makes Yoga Nidra so powerful is that although it approximates deep sleep, it is not deep sleep, because in the practice you develop the ability to remain being aware through all four brainwave patterns which means that the power of all four stages of consciousness are then available to you.