EEG Dipole Demo: Coronal Slice + Scalp Topomap

Place one or more current dipoles inside a simplified head/brain model and observe the predicted scalp potential pattern. Computation uses a point-dipole approximation in a homogeneous conductive medium: V ∝ (p · R) / |R|³, summed over dipoles.

Dipoles

Selected dipole controls

Amplitude (a.u.)

Orientation (degrees)

Arrow length (display)

Depth constraint

EEG / Topomap options

Average reference (subtract mean) Show electrode values Auto color scaling Show coronal slice background

Topomap resolution

Higher = smoother but slower.

Coronal background opacity

Interaction

Click a dipole to select it; drag to move.
Drag the small handle at the arrowhead to rotate.
Keyboard: Delete removes selected; A/D rotate; W/S change amplitude.

Coronal slice (dipoles + scalp electrodes)

min: —

max: —

Scalp topomap (2D interpolation)

min: —

max: —