Brain's State Closer To The Stimulus Frequency example essay topic

Theory behind BrainWave Generator EEG and the brain's state EEG (Electroencephalography) technology is used to measure brain's electrical vibrations from the surface of the scalp. The resulting EEG pattern will contain frequency elements mainly below 30 Hz. The frequencies are categorized into four states as follows: State Frequency range Amplitude State of mind Delta 0.5 Hz - 4 Hz high (up to 200 uV) Deep sleep Theta 4 Hz - 8 Hz low (5 uV - 20 uV) Drowsiness (also first stage of sleep) Alpha 8 Hz - 14 Hz high (up to 200 uV) Relaxed but alert Beta 14 Hz - 30 Hz low (less than 10 uV) Highly alert and focused The dominant frequency in the EEG pattern determines what shall be called the current state of the brain. If the amplitude of the alpha range frequencies is highest, then the brain is said to be in the alpha stage. Note, that other frequencies still exist and it is impossible to give any 'exact frequency your brain is operating on'. However, later references to the brain states use the simplification of assuming that such a single frequency exists.

Entraining the brain to a desired state If external stimulus is applied to the brain, it becomes possible to entrain the brain frequency from one stage to another. For example, if a person is in beta stage (highly alert) and a stimulus of 10 Hz is applied to his / her brain for some time, the brain frequency is likely to change towards the applied stimulus. The effect will be relaxing to the person. This phenomenon is also called frequency following response. When the brain's state is close to the applied stimulus, entrainment works more efficiently. Thus, when doing a sweep from one frequency to another, the starting frequency should be as close to your current brain state as possible.

The sweep speed should be such that your brain's state changes steadily with it, so that the difference never gets very large. In practice, it is difficult to determine your brain state without extra equipment (like EEG devices). However, you can quite safely assume that during the day your brain is in the beta stage (about 20 Hz) and you can start the sweep from there. If you are already somewhat relaxed, you can use a start frequency of 15 Hz or a few Hz lower.

Stimulating the brain with binaural beat frequencies The easiest way of applying stimulus to the brain is via ears. Other senses could be used as well, and vision is actually used quite often (often in addition to hearing). However, humans cannot hear sounds low enough to be useful for brain stimulation, so special techniques must be used. One such special technique used is called binaural beats. If the left ear is presented with a steady tone of 500 Hz and the right ear a steady tone of 510 Hz, these two tones combine in the brain.

The difference, 10 Hz, is perceived by the brain and is a very effective stimulus for brainwave entrainment. This 10 Hz is formed entirely by the brain. When using stereo headphones, the left and right sounds do not mix together until in your brain. The frequency difference, when perceived by brain this way, is called a binaural beat. The effect of the audible frequencies used To get a stimulus of 10 Hz, you may use tones of 500 Hz and 510 Hz, or 400 Hz and 410 Hz, or 800 Hz and 810 Hz, or so on. The only requirements are that the tone is heard well enough and that it is below about 1000 Hz.

Below 1000 Hz, the wavelength of the skull is sufficiently small so that the sound waves curve around it. You may try out different audible tones with BrainWave Generator and see which ones work best for you. Altered brain states As mentioned above, applying a stimulus to the brain will eventually bring the brain's state closer to the stimulus frequency. The following paragraphs describe some possible effects of this.

Note, however, that just passively listening to binaural beats does not necessarily alter your state of consciousness. For example, willingness and ability to relax and focus attention affects how effective the binaural beat stimulus is for inducing state changes. Helping in meditation Meditation is essentially about willingly being able to alter one's brain frequency to a desired state. While mediators have traditionally used several years to learn the techniques of meditation, you can now attain the same effect with brainwave entrainment. No special training or great discipline is required. Good meditation frequencies are in the alpha range, from 8 Hz to 13 Hz.

When a certain brainwave state is experienced and practiced over a period of time, the brain will 'learn' the state change and it will become easier to self-produce the desired brainwave state at will. Thus, using brainwave entrainment, you can expect to get some of its effects later even without any entrainment. Reducing learning time The theta stage (4 hz - 7 Hz) has been found to increase learning capabilities. In fact, children spend more time in theta stage than adults, which probably explains the accelerated learning capabilities of children. Alpha frequencies are also useful for learning purposes. You can play language cassettes, subliminal tapes, etc. during an entrainment session for a maximum effect.

Reducing sleep needs Some people have found that half an hour a day of the Theta stage can replace up to 4 hours of sleep. Treatment of certain mental diseases Brainwave entrainment is used in treatment of depression, low self-esteem, attention deficit disorder, drug and alcohol addiction and autism, to name a few. Brainwave entrainment has also been found helpful in alleviating headaches and migraines. Miscellaneous Some users have also reported increases in their sex drive as a result of brainwave entrainment..