EEG Session 21: Theta Isochronic Tones

This page contains the data and analysis of a brain wave recording session I did using a Muse Gen 1 EEG Headband.

Session Characteristics

  • 09/11/2023, 14:22
  • During this session, I was testing an advanced Thetaisochronic tones track I created.
  • I was listening to the track with my eyes closed.

All Sensors

  • Very highAlphadominance is to be expected since this is a relaxed session with my eyes closed.
  • Thetahas second-place dominance across most of the session, however, as shown in Session 20, this is most likely due to me being in a calm state than it is a result of entrainment. So we’ll have to keep looking for clearer entrainment signs elsewhere.
  • There is a tight band ofTheta,Beta,and Delta in the middle, which is similar to Session 19 and Session 20.
  • Gammaloses energy and dominance over time.

Right, Back (TP10)

  • Looking at the Right, Back quadrant, a sign of entrainment is shown āœ…
  • Iā€™m referring to the behavior of theGammafrequency range ā€” an oscillating sinusoidal pattern with sustained and consistent peaks and valleys.
  • Similar effects have been observed in Session 19.
  • Similarly to Session 19, we can also observe lots of phase synchronization betweenGammaandBeta(peaks and valleys align).

How Did Dominance Percentages Change Over Time?

The graphs shown below show how dominant frequencies were across the session, in %.

  • Here are the most important insights:
  • The trend forGammaandBetawas to lose dominance across all sensors, throughout the session.
  • Alphamaintained stable dominance across all sensors, except for Front-Right (AF8) where it went from 34% dominance to 44% dominance, which corresponds to a 29% increase. This, coupled with the previous bullet point, indicates an idling increase in this brain quadrant.
  • Deltamaintained stable dominance across all sensors, except for Front-Left (AF7) where it went from 15% dominance to 18% dominance, which corresponds to a 20% increase.
  • The most important finding was related toThetain the Front (AF7, AF8), specifically in the Front-Left (AF7) quadrant, going from 12% to 19% dominance, corresponding to a 58% increase. In the Front-Right (AF8), about a 20% increase.
  • IncreasedThetadominance in the Front part of the brain (brainwave activity known as Frontal Midline Theta) is associated with states of prefrontal-cortex activation, attention, focus, and memory, but also meditative states.

Absolute Average Values (All Sensors)

  • Alphaaverage: 70 dB
  • Thetaaverage: 42 dB
  • Deltaaverage: 37 dB
  • Betaaverage: 36 dB
  • Gammaaverage: 13 dB

Percentual Average Values (All Sensors)

  • Alphaaverage: 56%
  • Thetaaverage: 16%
  • Deltaaverage: 12%
  • Betaaverage: 12%
  • Gammaaverage: 5%

Brainwave Lateralization

Center of Gravity

For reference: the circle with the black circumference marks the central area of the brain. Activity inside it is more central and symmetrical; outside is more asymmetrical.

  • Delta’s center of gravity was located in the CenterRight-Back quadrant.
  • Theta’scenter of gravity was located in the CenterRight-Back quadrant.
  • Alpha’scenter of gravity was located far away in the CenterRight-Back quadrant.
  • Beta’scenter of gravity was located in the CenterRight-Back quadrant.
  • Gamma’scenter of gravity is located at and oscillates near the Back border of the central circle.
  • The centers of gravity of this session are very similar to the ones of the session before (Session 20)

Get This Track

If you are interested in trying this track, you can get it as part of the NEX: Brainwave Entrainment Bundle

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