Biofeedback | Biohacking & Eugenics
EEG (Electroencephalography) is the measurement of electrical activity in the brain using sensors placed on the scalp.
Your brain is constantly generating electrical patterns. Different mental states produce different patterns:
- Delta waves (0.5-4 Hz) â deep sleep, unconsciousness
- Theta waves (4-8 Hz) â drowsiness, meditation, creativity, the hypnagogic state between waking and sleeping
- Alpha waves (8-13 Hz) â relaxed alertness, calm focus. Meditation practitioners show strong alpha.
- Beta waves (13-30 Hz) â active thinking, problem-solving, anxiety. Most of your waking life.
- Gamma waves (30+ Hz) â intense focus, insight, higher cognitive processing. Experienced meditators show unusual gamma activity.
Why EEG matters for biohacking:
Neurofeedback â using real-time EEG to train your brain. You watch your brainwave patterns on a screen and learn to shift them deliberately. This has shown promising results for ADHD, anxiety, PTSD, and performance optimization.
Meditation verification â EEG can objectively show whether your meditation practice is actually changing your brain activity, not just how you feel about it.
Sleep optimization â consumer EEG devices (like Muse or Dreem) track sleep architecture and can help identify problems like insufficient deep sleep.
Brain-computer interfaces â EEG is one pathway to controlling devices with your thoughts. Still primitive, but advancing rapidly.
The limitation: EEG has poor spatial resolution â it tells you when something happens in the brain but not precisely where. For that, you need fMRI. But EEG is cheap, portable, and real-time, which makes it far more practical for personal use.
Related: Biofeedback, Biohacking & Eugenics, Future tech