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EEG Viewer
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Demo
Load Demo EEG
Load Demo AVG (P300)
Channels
All
None
Labels: On
Scale
X — Time window (sec)
−
+
Y — Amplitude (µV/div)
−
+
Sample rate (Hz)
Filters
Highpass (Hz)
Apply
Lowpass (Hz)
Apply
60Hz Notch
50Hz Notch
Poly Detrend
1
2
3
4
Detrending…
Reset Filters
Montage / Reference
None (as recorded)
Average Reference
Linked Mastoids (A1+A2)
Surface Laplacian
Apply Montage
Computing Laplacian…
Reset to Original
Bad Channels
Detect flat/noisy channels, or enter manually. Bad channels are interpolated from nearest neighbours before spatial Laplacian.
Flat threshold (µV)
Noisy threshold (µV)
Auto-detect Bad Channels
Bad channels (comma-separated)
Interpolate Bad Channels
Clear
Eye Blink Removal
EOG / Frontal channel
Auto-detect (Fp1/Fp2/EOG)
Threshold (µV)
Detect Blinks
Remove Blinks
Undo Removal
▶ Play
■ Stop
Event Markers
Right-click scroll/epoch view to add a marker at any position.
No markers yet.
+ At Cursor
Clear All
⬇ Export Markers CSV
Bad Blocks
Mark continuous segments of EEG as bad (artifact, movement, etc). Bad blocks are shown as red overlays and excluded from analysis.
Mark Range
Clear All
No bad blocks.
Epoch Extraction
Extract time-locked epochs around markers. Overlay all epochs per channel with mean ERP trace.
Pre:
ms
Post:
ms
⟳ Extract Epochs
Clear
Epoch Rejection
Right-click an epoch cell to reject it. Rejected epochs are excluded from ERP averaging.
No rejections.
Reject Range
Clear All
Export
⬇ Save PNG
⬇ Save CSV
Spectral Analysis
View
Power Spectral Density
Spectrogram
Band Topography
Wavelet (CWT)
Max Frequency
30 Hz
50 Hz
100 Hz
Band (Topo)
δ Delta (0.5–4 Hz)
θ Theta (4–8 Hz)
α Alpha (8–13 Hz)
β Beta (13–30 Hz)
γ Gamma (30–100 Hz)
Electrode
Log scale (PSD)
Wavelet Cycles
3 — more time res.
6 — balanced
10 — more freq res.
CWT Colormap
Hot
Jet
Viridis
Plasma
▶ Compute Spectra
sLORETA
Forward Model
3-Shell Analytic BEM
Berg-Scherg (fast)
View
Axial (top)
Sagittal (side)
Coronal (front)
3D Glass Brain
Regularization
0.001 low noise
0.01 default
0.05 noisy
0.1 very noisy
Threshold (%)
25%
Colormap
Hot
Jet
Cool
Brain Overlay
Brain MRI
BEM shells
Axial Z slice (mm)
0
Run sLORETA
Export PNG
Dipole Fit · BEM
Forward Model
3-Shell Analytic BEM
Berg-Scherg (fast)
Max Iterations
200 (fast)
500 (default)
1000 (thorough)
Fit Dipole
Axial Z (mm)
0
Sagittal X (mm)
0
Coronal Y (mm)
0
Brain
BEM shells
Electrodes
Jump to dipole
Champagne · BEM
Forward Model
3-Shell Analytic BEM
Berg-Scherg (fast)
Max Iterations
50 (fast)
100 (default)
200 (thorough)
Convergence ε
1e-4 (loose)
1e-5 (default)
1e-6 (tight)
View
Axial (top)
Sagittal (side)
Coronal (front)
3D Glass Brain
Threshold (%)
25%
Colormap
Hot
Jet
Cool
Brain Overlay
Brain MRI
BEM shells
Axial Z slice (mm)
0
Run Champagne
Export PNG
eLORETA
Forward Model
3-Shell BEM
Berg-Scherg
Regularization
0.0 (exact)
0.001 low noise
0.01 default
0.05 noisy
View
Axial (top)
Sagittal (side)
Coronal (front)
3D Glass Brain
Threshold (%)
25%
Colormap
Hot
Jet
Cool
Brain Overlay
Brain MRI
BEM shells
Axial Z slice (mm)
0
Run eLORETA
Export PNG
Scroll View
Epoch View
Topo Map
Dipole
sLORETA
Spectral
Champagne
eLORETA
Visibility
Electrodes: Off
Channels: Off
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DEMO DATA
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ERP VIEWER
← Back
Amplitude Scale
5µV
+
−
Analysis
→ sLORETA
→ Champagne
→ eLORETA
→ Dipole Fit
→ Topo Map
→ Spectral
Shift+drag to select
a time window first
Actions
Baseline Correct
Clear Peaks
⬇ Export PNG
⬇ Export CSV
Channels
All
None
Labels
▼
Hover — cursor readout
Click — mark peak
Shift+drag — select window
Dbl-click — clear all
AVG / ERP
Electrodes: Off
✕ Unload AVG
EPOCH SETTINGS
Pre-stimulus
ms
Post-stimulus
ms
Baseline
ms pre
Set intervals and click Extract to epoch around markers.
Cancel
Extract Epochs
＋ Add marker here
＋ Add marker at cursor
✕ Reject this epoch
Clear all markers
ADD MARKER
Color:
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