Definition of delta rhythm in English:

delta rhythm


  • Electrical activity of the brain at a frequency of around 1–8 Hz, typical of sleep. The resulting oscillations, detected using an electroencephalograph, are called delta waves.

    • ‘Brain research has shown that using sound phasing for brain synchrony will adjust the brain waves to deeper states down to the delta wave pattern.’
    • ‘Research has shown alpha wave intrusion into non-REM delta wave sleep 70% greater than controls.’
    • ‘By stage 4, the brain produces delta waves almost exclusively.’
    • ‘The amplitude of delta waves is very high relative to other frequencies.’
    • ‘As the participant enters deeper sleep, large amplitude delta waves may be observed.’