EEG Session 13: Sudoku

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

Session Characteristics

  • 02/11/2023, 16:52
  • During this session, I was playing a 9×9 Sudoku game on paper.
  • In the middle of it, I got a bit sleepy.

All Sensors

  • Even though looking at the data as is shown below is not very clear, we can still discern that:
  • Gammahas the lowest dominance throughout the whole session, and it’s separated into its own territory.
  • Over time,Gammaincreases in energy, while other frequencies remain more stable.
  • For a clearer picture let’s smooth out this activity.

All Sensors (Smoothed Out)

  • Smoothing out the frequency bands confirms what was mentioned in the previous section.
  • GammaandBetaremain in lower dominance throughout the whole session, which seems to be unexpected since this session supposedly required some brain effort.
  • However, since I mentioned I felt a bit sleepy during the middle of the session, that indicates that I was performing this task in a relaxed state. The nature of Sudoku does not require super-focused attention under a chronometer (like Session 12) so it’s possible to complete that activity while being more relaxed, which might explain the graphs we’re observing.
  • Still, looking at the sensor data from all sensors rarely tells the whole story, so next we’ll look into individual sensor data.

AF7, AF8 and TP10 Sensors (Smoothed Out)

  • Looking at the Front-Left (AF7), Front-Right (AF8), and Back-Right (TP10) sensors, we detect, overall, the same pattern.
  • HighAlphadominance and lowBetaandGammadominance in all those quadrants seem to show that there is not much activation happening there.

Left-Back Sensor (TP9)

  • The only sensor left to analyze is the Left-Back (TP9).
  • We must find some form of higher activation in this part of the brain, otherwise, you probably won’t even believe I was able to solve the Sudoku game.
  • And indeed that is what is observed in the graph above! ✅
  • WhileAlphais still dominant,Betaclearly takes the second lead in dominance, andGamma,even though it’s still the lowest dominant range, is much higher than in other quadrants, and helps form a tighter band comprised of all five frequencies.
  • This indicates that the brain power used for solving Sudoku was located mainly in the Left-Back quadrant. This is similar to Session 12.

Absolute Average Values (All Sensors)

  • Alphaaverage: 61 dB
  • Thetaaverage: 53 dB
  • Deltaaverage: 49 dB
  • Betaaverage: 45 dB
  • Gammaaverage: 23 dB

Percentual Average Values (All Sensors)

  • Alphaaverage: 35%
  • Thetaaverage: 24%
  • Deltaaverage: 19%
  • Betaaverage: 17%
  • Gammaaverage: 6%

Brainwave Lateralization

Center of Gravity

For reference: the circle 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 Center-Back quadrant.
  • Theta’scenter of gravity was located in the Center-Back quadrant.
  • Alpha’scenter of gravity was located in the Center-Back quadrant.
  • Beta’scenter of gravity was located in the Left-Back quadrant.
  • Gamma’scenter of gravity was located in the Left-Back quadrant.
  • This is my second session exerting conscious mental effort (the first was Session 12) and for the second time, I see all centers of gravity fall outside of the central circle, and specifically 🟢 Beta and 🟠 Gamma in the Left-Back quadrant. Is this the (or at least my) brain wave pattern for solving brain games?

Stay Synced!

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