What EEG measures
EEG, or electroencephalography, records the brain's electrical activity through sensors on the scalp. It is noninvasive and painless. It picks up rhythms, often described by their speed, such as alpha and theta, that shift with states like rest, focus, stress, and calm.
What changes during a psychedelic session
Brain recordings taken during psychedelic experiences show clear shifts. In one imaging study, psilocybin reduced the strength of brain rhythms across a wide range of frequencies, most notably in the alpha range, including in regions linked to self-focused thought [1]. Measuring these shifts around a session helps show what changed, and gives a target to return to.
What brain data can tell you
- A personal baseline. Where your brain activity starts before a session, so later changes have something to be compared against.
- Before and after. How your patterns shift from before a session to the weeks that follow.
- Trends over time. Whether the change is holding, building, or drifting back, week by week.
- Training targets. Which patterns a neurofeedback program should help you practice.
What it cannot tell you
Brain data is not a diagnosis, and it does not read your thoughts. It is one signal among many, and it works best alongside how you feel and what you and your care team notice. That is how Psio uses it: as proof that supports the conversation, not a replacement for it.
How Psio uses it
Psio records brain activity before, during, and after each session with a comfortable headband, turns those recordings into simple brain maps you can understand, and builds a personalized neurofeedback practice from them. Over the following weeks, you and your care team can see your progress as it builds.
