Research · EEG NEIRY · bodily practices

Measurement of focus practices in the body using EEG NEIRY

What changes during immersion, what the device does not see, how Pure Nothingness differs from hypnagogia and how to record the practice - analysis of 631 recordings
ex NIHILO · Konstantin Shel

A man sat with his eyes closed for forty minutes. Was it practice or was he I just sat for forty minutes - it’s hard to say how it feels. Especially at the beginning when your own scale has not yet been calibrated and any silence seems deep.

EEG answers this question. Not to all questions, but to important ones - and below is exactly what how this is done, with and without promises that the device does not keep.

Directory of metrics: how do you verify it?

Below in the text the same indicators are constantly mentioned - and it is they, not a story about practice is your tool for scientific verification. Body care is not proven sensations, but is fixedshifting these indexes relative to your base. We collected them in one table. All EEG rhythm values are normalized by the manufacturer from 0 to 1 (sum ≈ 1.0): if one stripe grows, others give way to it.

MetricsWhat is thisWhen diving
Alpha (8–13 Hz)Rhythm of active inhibition of the cortex. It rises with closed eyes, when attention stops clinging to the external.growing (+49%)
Beta (13–30 Hz)The rhythm of cognitive processing and the internal commentator. The “voice in the head” goes away when it subsides.falls (−40%)
Theta (4–8 Hz)The rhythm of memory, intuition and transitional states. We have a drowsiness marker: when deepeningis silent. But for experienced practitioners, theta is higher at a basic level, and with certain preparation, it can dominate at certain moments - this is not dormancy, but a different mode of operation.falls (−49%)
SMR (12–15 Hz)Sensorimotor rhythm: the body is motionless, but the brain is awake (“calm body, clear mind”). The channel closest to contact with the body.moderate
Relaxation IndexSimple Alpha/Beta ratio. Quick indicator of "relaxed or tense". > 2.0 - peace.jump ×2–3
Concentration IndexReverse: Beta/Alpha. It falls when attention ceases to be a directed beam.collapses ×3
HR/SI BaevskyPulse and voltage index of regulatory systems according to HRV. Baevsky is built onevennessrhythm, not beat frequency.pulse is more regular
Stress IndexRaw proprietary value on pulse metronomy. It grows from both tension and depth—you can’t call it “stress.”grows (trap)
How to read shifts

In parentheses are the medians for our 8 deep sessions: the top five lines have shiftedwithout a single exception (8/8), the bottom two (“Alpha Gravity” and pulse) walk almost like a coin. We rely only on those that everyone agrees on.

What the device sees and what it doesn’t

Sees

Did the body let go and did the internal dialogue calm down? How deep the person left, how many minutes it took to get there, how long he lasted, and how smoothly.

Doesn't see

Where is attention directed? Body, breath, emptiness, mantra - device does not distinguish them. It shows not the address of attention, but the result.

This is not a flaw, it is a device of the method. Contact with the body is measured according to the following: when attention really goes into the body, the body lets go, and thinking subsides - and This is clearly visible.

This is what raw data looks like

The device writes a line every 30 seconds. Nothing smoothed out, no interpretation - Here is a fragment of a real recording around the moment when a person went into the depths. Lines after entry are highlighted.

MinutesRelaxation IndexAlphaBetaThetaHeart RateStress Index
1m00.679160.156180.0974372.791395.1436
1m00.690330.108160.1358671.8118123.752
2m00.577720.162110.1898571.3749192.9
2m2.660280.431880.130410.1605972.9175219.885
3m1.998760.236860.094620.1836288.539168.0355
3m1.496240.138820.071890.1531182.970451.842
4m2.152380.414410.211560.2842677.312735.8973
4m3.374230.485650.164370.2826973.663236.8032
NEIRY upload fragment, eight lines in a row - two per minute. Highlighted from the line where the relaxation index has tripled: this is it moment of entry. At the same time, look at what Stress Index is doing at the same moment - go to it we'll come back below.

What changes when diving

The same session in its entirety. You can see how in the sixth minute everything shifts at once: alpha goes up, beta and theta go down.

0.00.20.40.60.8entrance · 6 minBetaThetaAlpha0 min15 min30 min
Alpha, theta and beta by minute, same session. The countdown starts from the beginning practice - calibration minutes at the beginning of the recording are cut off, so the numbering is here shifted relative to the raw table above. The scale is general: these are fractions, not microvolts.
02468100 min15 min30 min
Relaxation index of the same session: from 2–3 to 8–9 in one minute, and beyond lasts until the end.

This is one entry. To understand whether this is a pattern or a coincidence, we compared each recording contains two points: the first three minutes (the person just sat down) and the deepest a five-minute segment of the same session.

indicatorbasedepthshiftit came together
Alpha0.480.74+49%8 / 8
Relaxation index2.436.74+210%8 / 8
Beta0.220.12-40%8 / 8
Theta0.170.09-49%8 / 8
Concentration index0.580.18-70%8 / 8
Alpha gravity1.071.19+4%4 / 8
Pulse73.470.6-5%5 / 8
Medians from deep session recordings. “Agreed” - how many records have the shift went in the same direction as the median. The top five moved without a single exceptions: this is the physiological basis of all indices. Bottom two lines muted - there the direction moves almost like a coin, you can’t rely on them.

Alpha is growingalmost one and a half times - the main rhythm of a calm wakefulness with eyes closed rises when attention stops clinging for the external.Beta is falling— the internal commentator leaves.Concentration collapsesthreefold: attention ceases to be directed beam. Separately about theta - when immersed in silence, itfallsdoubled. It will become clear below why this is important.

Honesty check

Select the “deepest section” and compare it with the beginning - a procedure that in itself increases the result. We checked: if you don’t take the best window, and the middle of the session or the last five minutes, the numbers are the same - alpha +81%, +78% and +79%. This means that this is a shift in the entire session, and not a well-chosen segment.

Trap: the “stress” column that grows with depth

The download contains the Stress Index. When diving hedoubles in size— median shift +108%. Literally reading: the deeper the practice, the greater the stress. Absurd, but the number is real.

60708090Pulse, beats/min0200400Stress Index0 min15 min30 min
Same session. The pulse slowed down and almost stopped fluctuating - and At the same time, the Stress Index tripled.

We figured out what he thinks. The index is based not on the pulse value, but on itsevenness: The more monotonous the intervals between beats, the higher the number. In ordinary life this works - under tension the rhythm turns to stone.

But in deep practice, the rhythm becomes metronomic in exactly the opposite way. reason: the body is motionless, the breathing is even, nothing twitches outside. In this post the heart rate spread narrowed from 2.6 to 0.7 beats, and the Stress Index increased from 124 to 367. The pulse became smoother and the index increasedsimultaneously in five out of six records.

Column title is not a description what it measures.The device does not distinguish between these two cases: at its input they look the same - even rhythm. Same picture, opposite reasons. We do not use this column to evaluate practices.

Three deep states and how they differ

All three walk with their eyes closed, and the device distinguishes them.

Pure Nothingness (MPE) - attention to nothing

Leaving into the void: no object, no body, no thoughts. We count according to seven signs simultaneously every minute: alpha rose, beta fell, relaxation increased, concentration collapsed, the background calmed down, alpha shifted to the front -and theta is silent. Signs are multiplied, not added: failed one - the index falls. A relaxed body with a working mind is not Nothing.

Visceral presence (V-MPE) - attention in the body

The depth is the same, there is one difference: attention does not dissolve in emptiness, but maintains contact with the body. It has gone deep and the regulation signal is holding - contact. Gone deep and the signal fell - slipped into Nothing, that is, I wanted one thing, but it turned out something else.

Hypnagogia (ATS) - the boundary of sleep

Descent to the threshold of falling asleep, from where the images and feeling of falling come. Metrica It is calculated directly from two bands - theta divided by alpha. Crossover starts from 1.0, We consider stable from 1.15, above 2.2 - it’s already a dream or an artifact.

alpha dominantborderlinecrossover · hypnagogiadream/artifact0.00.51.01.52.0our records Nothingtheta/alpha
Theta/alpha axis. The points are averages according to our records of Pure Nothingness. They all lie in the alpha dominant zone; until the crossover that starts hypnagogia, not a single minute was reached (maximum for all time - 0.94).

Same axis, but MPE treats theta as interference and ATS as target. Rising theta c Nothing means that a person did not go deeper, but floated into slumber. In ATS it means that the descent is going correctly. That's whyDrema is the main impostor for both practitioner: it feels almost indistinguishable from the depths, both there and there are quiet, heat and time disappears.

What the device doesn’t see - and how we cover it

Above, we honestly said: the device does not distinguish,Whereattention went into the body, into emptiness or to a mantra. MPE (void) and V-MPE (body) look identical according to EEG: alpha rose, beta and theta fell, Relaxation Index rose. The difference between them is - whether attention maintains contact with the body does not lie in raw signals. Equipment wearable hoop (no central leads, no beat ECG) direct interoception doesn't measure. This is not a hole in the method - it is the edge of the device, and we are not hiding it.

The solution is not to “think out” the address of attention from brain rhythms, butenter phenomenology of living as an independent object of measurementand triangulate it with physiology. The scheme we use:

Triangulation: brain + body + phenomenology

Three streams are combined into a composite indexMNPI(Multidimensional Neuroplasticity / self-regulation Progress Index). Phenomenology enters into it as separate subindexPI (Phenomenological Index)- structured LLM-assessment of self-reports on a fixed 5-criteria scale. Exactlycoincidence independent channels- and not any of them separately - allows us to say, that the person went into the body, and not into the void.

And most importantly: MNPI is built aslongitudinalindex, that is, every day it falls point on one time axis. By the difference between today's and baseline values (ΔMNPI) you see not onlyWhatthe method does to the brain, but alsoat what speed: how many weeks did it take for the Relaxation Index to reach a plateau, when concentration collapsed, how quickly the nocturnal vegetative flow was restored. The speed of restructuring is what distinguishes a working method from random enlightenment.

Fair Disclaimer

The MNPI is not a neuroplasticity measure per se and does not claim to be one. status. The relationship between its longitudinal shift (ΔMNPI) and neuroplasticity -working hypothesis, which we are checking, not an established fact. Neuroplasticity is only inferred indirectly, as ΔMNPI within one person over time (N-of-1), and undergoes convergent validation against 12 psychometric instruments. One session of neuroplasticity is not shows only the dynamics over days and weeks.

How the body and organs react to self-focus

A separate layer of the same measurement is what happens when attention does not just “go into body" in general, anddirected to a specific organ: heart, breathing, stomach. The EEG sees little here (frontal electrodes do not pick up visceral signals), but the fitness tracker and PPG sensor show the body's reaction directly. This is not a guess - this is what goes into the metrics heart rate variability (HRV).

The mechanics are simple. When you shift your attentiononorgan - for example, on the heart - the nervous system responds instantly: breathing adjusts to the sensation, heart rate changes the pattern, the periphery responds with an influx. In the data it looks likesplash indicators to the top levelat the moment of capture of attention: growsSDNNAndvariation range (MxdMn)— spread between the longest and shortest cardio interval, comes to liferespiratory sinus arrhythmia (RSA)- pulse starts “breathe” in rhythm with the chest, jumpsperfusion index(pulsation strength at the sensor location). Perfusion is generally the most sensitive marker of local inflow: when attention actually “turns on” to the organ, the blood flow in the tissue changes, and the device records this.

And then - the main thing that distinguishes contact from simple curiosity. When contactis installedand is maintained, the indicators do not go off scale, butreach a stable upper level and hold: RSA remains flat, SDNN stabilizes in the parasympathetic zone, Baevsky’s SI (stress index) slides down - the body switched to the “calm body, clear mind” mode. That is, the curve is not peak-and-back, and peak-and-plateau. It is the retention of the plateau, and not the jump itself, that says that a person is truly “took” the organ, and did not just jerk attention.

What to look for in the data

This is the very “phenomenology visible in the body”: your audio self-report (“I hold my heart, it is warm, smooth”) lies next to the HRV curve, and the coincidence of the two channels is phenomenology and physiology - again summarized in MNPI. So focusing on yourself ceases to be a metaphor and becomes measurable event: switching → surge → contact plateau.

What the Science Says: Focus on the Body through the Eyes of Research

Our sample of 631 entries is a pilot, and we write this openly. But the direction in which we measure, not our invention: it relies on established lines of neuroscience of the past years Let’s list the key ones so that it’s clear where our data stands in the field and where it rests into the ceiling of the equipment.

Reference studies

The general conclusion is simple: neuroscience confirms that focusing on the body is a measurable state, but a full measurement requires either laboratory equipment (HEP, central leads, ECG), or - like ours - an honest combination of objective channels with phenomenology. Some consumer rhythms provide depth and relaxation, but not address. This is why all our designs are built around the MNPI, rather than around a single EEG waveform.

Four numbers that make everything up

Each session is broken down into four facets - individually, not with one score. The overall score hides exactly what you need to know.

What should you look out for in a recording?

Before reading the numbers, you need to make sure that the record is valid.

Practice recording protocol

Level 1 · every session

Level 2 · every day

Night recovery and sleep from the tracker. Practice affects not only those twenty minutes that a person sits, and the next night is the most sensitive indicator.

Level 3 · every week

Summary: how many practices took place, how many were missed, median across four edges.It is necessary to record omissions— their dynamics speak about the program no less than the numbers of the sessions held.

Level 4 · beginning and end of the program

Validated before and after questionnaires. Not homemade scales: if the result should have weight beyond your audience, you need tools that someone already validated.

How to evaluate the effectiveness of a program

  1. Remove the base period before the start.Two to three weeks of measurements BEFORE start of the program. Without it, any growth is due to recency effects or returns to the average after a bad period - and it is during the recession that people come to study.
  2. Build a timeline for interventions.One axis: program start, change of protocol, intensive, work with a master, illness, vacation, change of sleep pattern. All data channels and the final ΔMNPI are placed on it. The question is not “what is a person’s index”, butwhat moved after a specific event and after how many days— it is the interval between the intervention and the MNPI shift that is the measured rate of brain change.
  3. Consider the shift relative to personal spread, not as a percentage. Everyone has their own variation between days; the shift is counted only if it is his exceeds. Otherwise you are measuring the weather.
  4. Count people, not the group average.Correct wording: “For 11 of the 18 participants, the shift exceeded their own spread.” The average hides those those who got worse, and those for whom nothing has changed.
  5. Count the dropouts.Who stopped walking is part of the result, not data loss. A program where half fell off, but the rest are excellent dynamics, works worse than it looks.
  6. Look for a match of independent channels.Entry accelerated, night recovery has increased, the dictionary in the diary has changed - and all this in one window time. This is already the result.
  7. Post what hasn't moved.No effect either result, and for trust it is more important than another beautiful number.

Methodological note

Equipment.Wearable EEG NEIRY with frontal location of dry electrodes and stationary capsule from the same manufacturer. There are no central leads There is no ECG for individual strokes.

What kind of indicators?Alpha, beta, theta in unloading - not absolute power in µV², and the values ​​standardized by the manufacturer are 0–1. Relaxation index, concentration index, alpha gravity - proprietary composites, formulas are not disclosed. We work with them as reproducible quantities, and not as physical ones: We compare a person with him using the same device. Indexes of the same name between devices differ by 2–3 times.

Sample.8 recordings of deep sessions; total database - 631 records EEG. The direction of the shifts is unambiguous, but this is a pilot, not a population norm.

Artifacts.Lines that are completely missing are automatically rejected signal and calibration section at the beginning of capsule recordings. Separate rejection no muscle artifacts - this is a limitation: frontal electrodes are voltage sensitive forehead and jaw, and this contribution falls into the beta range.

Which we do not claim.That the device distinguishes the object of attention. That the scores are comparable between people. That this sample is enough for the norm. That proprietary indices have a direct physiological meaning.

How to connect channels.Brain (EEG rhythms and indices), body (HRV according to Baevsky from a fitness tracker) and phenomenology (audio self-report of the participant) are combined into a composite index MNPI. This is not a “neuroplasticity meter” - the relationship of its longitudinal shift with neuroplasticity we test it as a working hypothesis. But it is MNPI that allows you to see the method as a single process: how a shift in phenomenology (PI) coincides with a shift in brain rhythms and autonomic background - and at what rate it accumulates day by day.

Direct measurement of interoception - cortical response to individual heartbeats and rhythms over the sensorimotor cortex - requires equipment that There are no wearable hoops. Closest work to the topic: Harvard Meditation Laboratory, 2025, experienced Vipassana practitioners. The hoop confirms the depth and stability of the state; the attention address is confirmed by other equipment, and we test this path separately.

Participants’ data is anonymized, only aggregated indicators are published. Graphs and tables are collected from the original downloads automatically.

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