1. Your brain is made up of billions of brain cells called neurons, which use electricity to communicate with each other. The combination of millions of neurons sending signals at once produces an enormous amount of electrical activity in the brain, which can be detected using sensitive medical equipment (such as an EEG), measuring electricity levels over areas of the scalp. The combination of electrical activity of the brain is commonly called a Brainwave pattern, because of its cyclic, 'wave-like' nature. Our mind regulates its activities by means of electric waves which are registered in the brain, emiting tiny electrochemical impulses of varied frequencies, which can be registered by an electroencephalogram.

3.  1 Beta emited when we are consciously alert, or we feel agitated, tense, afraid, with frequencies ranging from 13 to 60 pulses per second in the Hertz scale.  Wide awake. This is generally the mental state most people are in during the day and most of their waking lives. Usually, this state in itself is uneventful, but don't underestimate its importance. Many people lack sufficient Beta activity, which can cause mental or emotional disorders such as depression, ADD and insomnia. Stimulating Beta activity can improve emotional stability, energy levels, attentiveness and concentration.

4.  2 Alpha when we are in a state of physical and mental relaxation, although aware of what is happening around us, its frequency are around 7 to 13 pulses per second.  Awake but relaxed and not processing much information. When you get up in the morning and just before sleep, you are naturally in this state. When you close your eyes your brain automatically starts producing more Alpha waves.  Alpha is usually the goal of experienced meditators, but to enter it using NP2 is incredibly easy. Since Alpha is a very receptive, absorbent mental state, you can also use it for effective self-hypnosis, mental re- programming, accelerated learning and more.

5.  3 Theta more or less 4 to 7 pulses, it is a state of somnolence with reduced consciousness.  Theta can also be used for hypnosis, accelerated learning and self- programming using pre-recorded suggestions, just as you are falling asleep.

6.  4 Delta when there is unconsciousness, deep sleep or catalepsy, emitting between 0.1 and 4 cycles per second.  Deep, dreamless sleep. Delta is the slowest band of brainwaves. When your dominant brainwave is Delta, your body is healing itself and "resetting" its internal clocks. You do not dream in this state and are completely unconscious.

7.  Rapid Eye Movement- stage of sleep in which the brainwave activity is at the Beta stage, but the person is completely asleep.  Stage of Sleep in which dreaming occurs

8.  In a normal night's sleep, a sleeper begins in stage 1, moves down through the stages, to stage 4, then back up through the stages, with the exception that stage 1 is replaced by REM, then the sleeper goes back down through the stages again. One cycle, from stage 1 to REM takes approximately ninety minutes. This cycle is repeated throughout the night, with the length of REM periods increasing, and the length of delta sleep decreasing, until during the last few cycles there is no delta sleep at all.