What are Brainwaves?
Brainwaves are the actual rise and fall of the electrical
impulses sent throughout the brain. The brain is made up of billions of
neurons, each one constantly communicating with the others around it
with electrical impulses. Because so many are firing at once the
electrical activity actually forms waves or pulses of electrical
activity which we call brainwaves. The different brainwave
patterns can be recorded by electrical sensors placed on the head of an
individual. The machine responsible for this type of recording is the
EEG and through its use researchers have been able to map the different
brainwave states and their relation to consciousness.
Picture of a neuron:
Below are some typical
recordings of brainwave states by the EEG:
More modern EEG recordings:
Significance of Brainwaves
Since the invention of the EEG and the resulting research
into the relationship between brainwaves and conscious state much
information has been gathered. For example we now know that certain
brainwave patterns relate to different states such as intense
concentration, dreaming sleep, deep dreamless sleep, relaxation,
contemplation, lucid dreaming and even exotic states of consciousness
such as hypnosis, trance, visionary experiences or spiritual
The EEG has also been used to map the
states of people with ADD, depression, anxiety and many other mental or
emotional issues which makes it possible for doctors to get a good look
at someone's emotional state simply by watching their brainwaves.
Brainwaves are effected by all of our
senses and whatever a person is experiencing will effect their current
brainwave state. With the use of any repetitious impulse to any one or
more of our senses our brainwaves will naturally start to resonate with
the given impulse. Flashing lights, watching a pendulum or hearing a
constant rhythm will all stimulate the brainwaves of an individual to
resonate with the rhythm of the sensory input. This is called Brainwave
Entrainment With Sound
With the use of certain sounds we can
easily entrain a persons brainwaves to a certain frequency which
corresponds to a certain mental state. As shown in the picture below a
sound pulse will cause a cortical response in the brain of a listener at
the same frequency as the sound wave.
the brain is given a continual beat of the same frequency sound it will
automatically become entrained to that beat and the individual will be
lead into the state of consciousness that corresponds to the frequency.
We can also cause entrainment by modifying sounds such as music by small
amounts so that the changes in the music are almost inaudible but which
still entrain the brainwaves of a listener.
Although all rhythmic sounds entrain
brainwaves to an extent it is only when the rhythm gets close to the
natural brainwave frequencies that the brain is effected to any great
degree. If the sounds are consistent enough and are close to normal
brainwave frequencies then the brain will respond by synchronizing its
own electrical impulses to the same rhythm. When this occurs it can be
said that the brain has been entrained to a certain beat.
Below is an EEG recording of a normal
person at rest and also during brainwave entrainment to a 10Hz sound
frequency. As you can see the brain still exhibits brainwaves from the
low levels all the way up to 30Hz, the difference is that the 10Hz
frequency has become pronounced or dominant and so the conscious state
of the individual has also been effected.
As researchers have mapped many
brainwave frequencies we can now use audio brainwave entrainment to
easily induce any of the states that we desire such as, concentration,
meditation, lucid dreaming, super learning, sleep and many others.
Brainwave Entrainment has over 70 years of solid research behind it.
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