Spectra

Every channel's power spectrum from the clean segments of this recording. Flatten it to see what is genuine oscillation rather than 1/f background.

View Highlight

Click a channel to isolate it. Shaded bands mark delta, theta, alpha, beta and gamma.

Five-band composition per channel, as a share of that channel's total 1–45 Hz power.

Topography

Metric

Values for this recording only. Hover an electrode for the exact number.

Across the session

Posterior alpha center frequency in two-minute windows, five-window rolling median. The dashed line is this recording's own median.

Band

Band power per channel in two-minute windows, log scale. Posterior channels in warm colors, frontal in cool, temporal gray. This is the raw motion behind every summary number above.

Distribution of those window-level alpha frequencies. A narrow distribution means a stable peak frequency; a broad one means the rhythm wandered.

Spatial phase structure

A linear phase gradient fitted to the alpha phase across all fourteen electrodes in every clean 60-second window: its gradient vector k (direction and steepness), how well a single gradient explains the phase field (R²), and whether the field is closer to a fixed 0/π pattern or to a directional one. Switch bands to see that the structure belongs to alpha.

What these numbers are. These are scalp-level phase-gradient metrics. With this montage they cannot determine a wavelength or distinguish true propagation from lagged spatial structure — the identifiability result of §12; see also §13.

Band

Phase-gradient magnitude |k| (radians per head-radius, solid) and plane-fit R² (dashed, right axis) across the session. Dots are colored by the direction the phase gradient points that minute. Gray bands are the archive medians for psychedelic and non-psychedelic recordings (alpha only).

Phase-gradient portrait: every window's phase-gradient vector (k_x, k_y), colored from early (blue) to late (orange). Nose up. The bold arrow is the fit-weighted mean; its length is the direction consistency.

The leading spatial mode of this band — the pattern the fourteen channels co-vary in most strongly, as a scalp map. A single broad lobe is a standing pattern; a front–back gradient is a directional phase pattern, which this montage cannot distinguish from lagged spatial structure.

Standing-mode score (one dominant, phase-locked, stable spatial mode) against the plane-fit directional score (phase locking × plane-fit R²) minute by minute, with the stability of the leading mode below.

Band	Windows	\|k\|	Fit R²	Directional score	Standing	Direction	Consistency	Posterior-pointing	Phase locking

Standing-mode evidence over time for this recording, all bands

The standing-mode dashboard from the original analysis: standing-pattern score, leading-mode dominance, 0/π phase locking and non-directional score for every band across the session.

Photic resonance

This session ran the photic protocol: 30 s dark, then fourteen flicker frequencies from 6 to 16 Hz in random order, 20 s on and 10 s off. Each sweep's driven amplitude and fitted resonance are below; the archive-wide discussion is on the main page.

Sweep

Driven amplitude against flicker frequency (dots), the fitted resonance curve (line) and the dark-block reference (dashed).

Minute	f₀ (Hz)	Grid peak	Q	2f / f	Max SNR

Cross-frequency coupling

Which low-frequency phase organizes gamma amplitude, as a surrogate-tested z-score across the posterior channels. A thalamocortical-dysrhythmia signature would peak at 4–6 Hz; a healthy alpha-gated cortex peaks near the alpha rhythm.

Every metric

All recording-level measures computed for this session, with where each one sits in the archive. The bar shows the percentile among all recordings that have this metric.

Metric	Value	Pctile	What it means
Spectral
Posterior alpha center frequency (Hz)	9.973	39	The dominant posterior EEG wave pattern after removal of the aperiodic (1/f) background.
Alpha peak (whole-recording) (Hz)	10.143	73	Spontaneous alpha peak from the integrated spectrum.
Aperiodic exponent	0.807	11	Slope of the 1/f background; a coarse excitation/inhibition proxy.
Alpha peak above background (log10)	0.417	18	How far the alpha peak rises above its own 1/f fit.
Delta share	0.2888	50	Delta (1–4 Hz) fraction of five-band power.
Theta share	0.1410	70	Theta (4–8 Hz) fraction of five-band power.
Alpha share	0.1728	25	Alpha (8–13 Hz) fraction of five-band power.
Beta share	0.2604	95	Beta (13–30 Hz) fraction of five-band power.
Gamma share	0.1369	88	Gamma (30–45 Hz) fraction — muscle-sensitive at temporal sites.
Slow ÷ alpha ratio	3.187	52	(Delta+theta)/alpha. Rises with low vigilance.
Coupling
Frontal–posterior alpha wPLI	0.0243	4	Long-range alpha phase coupling, volume-conduction robust.
Frontal–posterior alpha PLV	0.1131	18	Phase locking between frontal and posterior alpha.
Frontal–posterior envelope r	0.2923	20	Amplitude co-fluctuation of frontal and posterior alpha.
Alpha harmonic PLV	0.0219	12	Phase locking between alpha and its second harmonic.
Alpha harmonic bicoherence	0.1224	32	Nonlinear coupling of alpha to 2×alpha — waveform sharpness.
Theta→gamma PAC (posterior z) (z)	-0.07	14	Surrogate-tested theta-phase / gamma-amplitude coupling.
Alpha→gamma PAC (posterior z) (z)	3.39	45	Surrogate-tested alpha-phase / gamma-amplitude coupling.
Waves
Alpha standing-pattern score (legacy)	5.766	41	How much of the alpha phase field is a fixed 0/π pattern. A scalp-level descriptor from the original analysis; see §12 for what it can and cannot show.
Alpha non-directional score (legacy)	4.263	50	Share of the alpha phase field not captured by a single phase gradient. Legacy descriptor; see §12.
Alpha plane-fit directional score (legacy)	2.150	39	Share of the alpha phase field captured by a single linear phase gradient. It does not by itself establish cortical propagation: lag-free correlated noise produces similar values (§13).
Alpha spatial phase locking	0.3510	32	Pairwise phase locking across the alpha field.
Plane-fit R²	0.1613	29	How well a single linear phase gradient explains the alpha phase field.
Metastability
Alpha state switches (/hour)	7.79	39	How often the alpha spatial configuration reorganizes.
Alpha state entropy	0.306	36	Diversity of alpha spatial states visited.
Clustered wave metastability	0.2287	59	Variability of alpha wave magnitude across clustered intervals.
Within-window synchrony SD	0.1932	62	Moment-to-moment variability of global phase order.
Synchrony
Global synchrony (KOP)	0.5416	71	Kuramoto order parameter across all bands.
Entropy
Spectral entropy	0.9024	86	Flatness of the 1–45 Hz spectrum.
Five-band entropy	0.9481	89	Evenness of power across the five bands.
Spatial entropy	0.9475	39	Evenness of power across channels.
Phase-difference entropy	0.9605	79	Dispersion of pairwise phase relationships.
Complexity
Lempel-Ziv (single channel)	0.8221	91	Signal diversity per channel — amplitude sensitive.
Lempel-Ziv (spatiotemporal)	0.7988	57	Signal diversity across the whole 14-channel field.
DFA exponent	0.6937	12	Long-range temporal correlation of the alpha envelope.
Alpha burst duration (s)	0.411	41	Mean length of a sustained alpha episode.
Alpha burst rate (/min)	9.22	39	How often alpha episodes begin.
Motion
Head tremor index	0.4656	61	8–12 Hz ÷ 2–8 Hz accelerometer power.
Head motion peak (Hz)	5.50	71	Dominant frequency of head motion.
Asymmetry
Right-alpha fraction	0.961	76	Share of windows with right > left alpha.
Alpha asymmetry magnitude	0.5689	60	Mean absolute log left/right alpha ratio.
Asymmetry side switches (/hour)	7.79	44	How often the dominant hemisphere flips. High values mean a dynamic lateralization, not a fixed one.
Alpha asymmetry (R−L)	27.37	64	Signed alpha asymmetry across homologous pairs; positive means right-dominant.
Alpha asymmetry, 1/f removed	62.84	79	The same measure computed on periodic power only, after each channel's own aperiodic background is subtracted. This is the number to trust.
Alpha right/left ratio (×)	1.766	61	Geometric mean of right-over-left alpha across homologous pairs.
Occipital asymmetry (R−L)	29.03	66	Alpha asymmetry at the occipital pair, the archive's most consistent lateralization.
Parietal asymmetry (R−L)	41.14	45	Alpha asymmetry at the parietal pair. P7 is the least reliable contact on the headset, so read this cautiously.
Frontal asymmetry (R−L)	18.51	61	Frontal alpha asymmetry. Often read as an approach/withdrawal index in the literature; that interpretation is not supported by a consumer montage.
Right/left alpha frequency (×)	1.0000	98	Ratio of right- to left-hemisphere alpha center frequency. Values near 1 mean the two hemispheres share one peak frequency; scalp EEG cannot say whether that reflects one source or several locked together.
Quality
Clean data retained	88.6	86	Share of the recording surviving artifact masking.
Duration (min)	93.6	50	Total recorded length.
Device
Device 'Focus'	0.439	53	Vendor score. Correlates negatively with alpha frequency — treat with suspicion.
Device 'Engagement'	0.626	60	Vendor score. Essentially an inverse-alpha detector.
Device 'Relaxation'	0.276	20	Vendor score, not a validated measure.
Device 'Stress'	0.374	7	Vendor score, not a validated measure.

Per-channel detail

Ch	α freq	α × bg	1/f exp	θ peak	δ	θ	α	β	γ	RMS	LZ	DFA	θ→γ z	α→γ z	CQ	EQ poor %
AF3	10.00	0.48	1.05	7.00	40.0	16.4	14.8	18.8	10.0	12.5	0.797	0.688	-0.3	3.5	4.0	0.0
F7	10.00	0.41	0.83	—	31.0	15.1	15.4	24.5	14.0	10.1	0.827	0.661	16.1	8.6	4.0	0.0
F3	10.00	0.58	1.12	—	27.0	18.4	21.1	21.5	11.9	8.0	0.814	0.666	4.3	-1.0	4.0	0.0
FC5	10.00	0.45	0.69	—	22.2	13.4	15.8	28.8	19.8	7.8	0.873	0.678	2.6	3.9	4.0	0.0
T7	—	—	0.59	—	5.8	3.9	10.4	52.8	27.1	10.3	0.882	0.702	3.9	95.3	4.0	83.0
P7	10.00	0.47	0.88	—	22.5	18.3	21.3	25.3	12.6	7.1	0.807	0.686	5.5	7.9	4.0	17.0
O1	10.00	0.66	0.95	—	24.3	16.7	24.2	22.8	12.0	7.2	0.821	0.694	-0.4	0.3	4.0	0.0
O2	10.00	0.67	0.88	—	21.6	15.8	27.8	23.0	11.8	8.5	0.826	0.731	0.3	4.2	4.0	0.0
P8	10.00	0.59	0.86	—	21.6	15.6	26.7	23.8	12.3	8.8	0.824	0.727	-0.5	2.6	4.0	0.0
T8	10.00	0.37	0.85	—	25.3	14.7	22.0	25.2	12.9	8.9	0.815	0.716	0.8	3.0	4.0	0.0
FC6	10.00	0.28	0.70	—	30.3	13.6	15.9	26.6	13.6	12.2	0.849	0.695	12.6	19.4	4.0	0.0
F4	10.00	0.48	1.07	—	29.5	16.5	19.6	22.6	11.7	10.9	0.819	0.715	1.1	4.4	4.0	0.0
F8	10.00	0.30	0.98	—	39.2	14.5	15.1	21.3	9.9	13.7	0.788	0.692	80.8	44.6	4.0	0.0
AF4	10.00	0.33	1.11	—	42.8	14.9	13.5	18.8	10.0	16.3	0.777	0.686	10.9	27.4	4.0	0.0

Signal quality

The five-detector screen — device-reported blinks and eye movements (±0.75 s), accelerometer jerk and rocking (±1 s), contact and EEG quality (±0.5 s), robust amplitude excursions and sample-to-sample jumps (±0.25 s) — is described in full in the Methods page. Only clean runs of at least two seconds are used.

Share of the recording removed by each artifact mask.

Non-diagnostic research on consumer EEG. Values describe recorded electrical patterns after artifact screening; they do not establish a mental state, a psychedelic effect, or a clinical finding. See the methods and limits.

Code: repository forthcoming — not yet public · Questions or corrections: outreach@theoscillome.com