What is a brainwave?
When our brain operates, billions of neurons communicate with each other by sending electrical signals to each other. When a doctor or research scientist hooks electrodes to our our scalp, a representation of those communications can be seen using an EEG (electroencephalograph). These representations are displayed as a waveform – a brainwave.
These neurons are firing at many different frequencies, but the predominant frequency is the one that determines our basic state of mind. Neuro-researchers have mapped general states-of-consciousness into five general frequency ranges:
Delta (1-4 Hz):
This is the slowest brainwave frequency range. We exhibit these frequencies when in very deep, dreamless sleep or when we are knocked out or unconscious. When delta brainwaves increase, the body’s ability to repair itself increases. We release more natural growth hormone, more anti-aging hormones and we slow down the release of cortisol – a stress hormone. These frequencies also allow us to reach the deepest attainable relaxation levels.
Theta (5-8 Hz):
The theta range is associated with beginning sleep stages and REM or dream sleep stages. It is also associated with day dreaming, a “wandering” mind, increased levels of intuition and increased creativity. This frequency range can also allow us to enter into very deep physical and mental relaxation states.
Alpha (9-14 Hz):
Alpha is a relaxed meditative state. Alpha waves increase when your body calms down and stress levels decrease. People experiencing the alpha range experience a sense of being calm, centered and content. This can also be a good mental state for creative work.
Beta (15-39 Hz):
Beta waves cause a state of mental alertness. Beta waves are produced each time you actively use your brain. Your brain goes into a beta state whenever you are calculating, reading, problem-solving, planning, thinking logically or otherwise fully engaging your mental faculties. Increased beta brainwaves are also associated with increased motivation, energy levels and focus.
Gamma (>40 Hz):
These are the highest frequency brainwaves. This brainwave frequency range is associated with increased mental processing speeds and power. The gamma state is also the state of high awareness and high perception. The increased brainwave frequency essentially makes our brain run faster. This allows information gathered by our senses from the surrounding environment to be collected and processed at a higher rate of speed.
In closing, let me say that no single brainwave frequency range is better than the others. Each has its advantages and disadvantages. Just as a wrench is not inherently a better tool than a hammer, each brainwave frequency range will be better than others in certain situations. The key is flexibility – being able to enter the best state-of-consciousness for the situation at hand.
Binaural Beats audio programs are a great way to experience all the different brainwave frequency ranges. Through the use of binaural beats, these audio programs can guide your brain to any desired state-of-mind through a process called entrainment.
