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Entrainment is a principle of physics. It is defined as the synchronization of two or more rhythmic cycles. The principles of entrainment appear in chemistry, neurology, biology, pharmacology, medicine, astronomy and more.
CASE IN POINT: While working on the design of the pendulum clock in 1656, Dutch scientist Christian Huygens found that if he placed two unsynchronized clocks side by side on a wall, they would slowly synchronize to each other. In fact, the synchronization was so precise not even mechanical intervention could calibrate them more accurately.
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.
Below is one of the first recordings of brain activity.
Here is a more modern EEG recording:
With the discovery of brainwaves came the discovery that electrical activity in the brain will change depending on what the person is doing. For instance, the brainwaves of a sleeping person are vastly different than the brainwaves of someone wide awake. Over the years, more sensitive equipment has brought us closer to figuring out exactly what brainwaves represent and with that, what they mean about a person's health and state of mind.
Brainwave Entrainment (pronounced: "ehn - TRAIN - mint") refers to the brain's electrical response to
rhythmic sensory stimulation, such as pulses of sound or light.
When the brain is given a stimulus, through the ears, eyes or other senses, it emits an electrical charge in response, called a Cortical Evoked Response (shown below). These electrical responses travel throughout
the brain to become what you "see and hear." This activity can be measured using sensitive electrodes attached to the scalp.
reproduced in the brain in the form of these electrical impulses. If the rhythm becomes fast and consistent enough, it can start to resemble the natural internal rhythms of the brain, called brainwaves. When this happens, the brain responds by synchronizing its own electric cycles to the same rhythm. This is commonly called the Frequency Following Response (or FFR):
When the brain is presented with a rhythmic stimulus, such as a drum beat for example, the rhythm is
FFR can be useful because brainwaves are very much related to mental state. For example, a 10Hz brainwave is associated with relaxtion [sic], so a 10 Hz sound pattern would help reproduce the relaxed state in your brain.
SIMPLIFIED: Entrainment means to slowly but surely become one with whatever is repeatedly seen, heard, done. Keep in mind out of sight is not out of mind, and music does not go in one ear and out the other. Each and every single time the brain of our CYYA is stimulated with criminalized musical speech (a form of sound) and criminalized images (a form of light), the messages and the images of crime are recorded on their brain. Recording by recording by recording, their brain eventually becomes one with crime.