Open vs Closed Fields in EEG Recordings

Suggested flow: (1) build intuition with dipole summation and cancellation, then (2) connect geometry/alignment to EEG waveform amplitude.

Alignment-driven summation (open vs closed field)

Heatmap of summed potential from multiple dipoles and simulated EEG electrode readout.

Layered cortex geometry + EEG waveform

Toggle neuron classes and adjust alignment/frequency; the EEG trace reflects summed vertical contribution. Large pyramidal neurons contribute the most to the EEG and are affected by alignment. Stellate cells contribute little due to their closed field structure.