Brainwaves Explained and Frequencies Range
What are Brainwaves?
At the root of all our thoughts, emotions and behaviors are the communication between neurons within our brains. Brainwaves are produced by synchronized electrical pulses from masses of neurons communicating with each other.
Brainwaves are detected using sensors placed on the scalp. They are divided into bandwidths to describe their functions (below), but are best thought of as a continuous spectrum of consciousness; from slow, loud and functional – to fast, subtle, and complex.
It is a handy analogy to think of brainwaves as musical notes – the low-frequency waves are like a deeply penetrating drum beat, while the higher frequency brainwaves are more like a subtle high pitched flute. Like a symphony, the higher and lower frequencies link and cohere with each other through harmonics.
Our brainwaves change according to what we’re doing and feeling. When slower brainwaves are dominant we can feel tired, slow, sluggish, or dreamy. The higher frequencies are dominant when we feel wired, or hyper-alert.
The descriptions that follow are only broad descriptions – in practice, things are far more complex, and brainwaves reflect different aspects when they occur in different locations in the brain.
Brainwave speed is measured in Hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.
Infra-Low brainwaves (also known as Slow Cortical Potentials), are thought to be the basic cortical rhythms that underlie our higher brain functions. Very little is known about infra-low brainwaves. Their slow nature makes them difficult to detect and accurately measure, so few studies have been done. They appear to take a major role in brain timing and network function.
DELTA WAVES (0.5 TO 4 HZ)
THETA WAVES (4 TO 7 HZ)
ALPHA WAVES (7 TO 13 HZ)
BETA WAVES (13 TO 40 HZ)
GAMMA WAVES (40 TO 200 HZ)
Gamma brainwaves are the fastest of brain waves and relate to simultaneous processing of information from different brain areas Gamma brainwaves are the fastest of brain waves (high frequency, like a flute), and relate to simultaneous processing of information from different brain areas. Gamma brainwaves pass information rapidly and quietly. The most subtle of the brainwave frequencies, the mind has to be quiet to access gamma. Gamma was dismissed as ‘spare brain noise’ until researchers discovered it was highly active when in states of universal love, altruism, and the ‘higher virtues’. Gamma is also above the frequency of neuronal firing, so how it is generated remains a mystery. It is speculated that gamma rhythms modulate perception and consciousness and that a greater presence of gamma relates to expanded consciousness and spiritual emergence.
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