The primary feature of certain devices is the “photic driving” of flickering light stimulation — a form of neuromodulation, sometimes combined with pulsed sound stimulation.
About Your Brain
Our brain is always seeking the “signal in the noise,” organizing sensory stimulation into patterns for easier recognition. This stability/plasticity dynamic requires both consistency and the capacity to change.
Types of Flickering Light & Pulsed Sound Stimulation
Brain Entrainment
Discovered in the late 1930s as the Frequency Following Response, later renamed Brain Entrainment: regular, repetitive light or sound signals cause the brain to produce electrical brain waves at the same frequency. This occurs in two stages — superimposition, then entrainment — typically requiring 6-8 minutes of sustained, regular stimulation.
Alpha Brainwaves are Not the Only Gateway into Meditation
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