Module catalog
53 interactive modules. Filter by cluster or search by topic, method or keyword.
- Bioelectric
Nernst & Goldman Membrane Potentials
Connect ionic gradients and temperature to equilibrium and resting potentials, then compare dipole and quadrupole far-field decay.
Chapter 7NernstGHK - Bioelectric
Volume Conduction & Spherical Head Models
Solve a radial dipole in a three-shell spherical head, compare a homogeneous conductor, and quantify skull-induced spatial spread.
Chapter 7EEGLegendre expansion - Bioelectric
Lead Fields, Reciprocity & Sensitivity
Build an EEG lead matrix, verify Helmholtz reciprocity numerically, and inspect depth sensitivity and singular-value decay.
Chapter 7lead fieldreciprocity - Bioelectric
12-Lead ECG & Vectorcardiography
Project a synthetic cardiac vector into ECG leads, inspect frontal QRS axis, and compare calibrated public PTB ECG recordings.
Chapter 7ECGVCG - Bioelectric
QRS Detection & HRV Analyzer
Inspect an offline QRS processing pipeline, match peaks to synthetic truth or MIT-BIH annotations, and quantify time-domain HRV.
Chapter 7QRSHRV - Bioelectric
EEG Rhythms, Spectra & ERP Averaging
Explore alpha attenuation, normalized Welch power, time-frequency resolution, occipital envelopes, and the limits of ERP averaging.
Chapter 7EEGWelch PSD - Bioelectric
MEG vs EEG: The Sarvas Dipole Model
Compute external magnetic fields from Sarvas’ formula and contrast radial versus tangential source sensitivity with idealized EEG.
Chapter 7MEGSarvas - Bioelectric
EMG Recruitment & Fatigue Indicators
Superpose size-ordered motor-unit trains and inspect how recruitment, rate coding, and MUAP broadening affect RMS and spectral median.
Chapter 7EMGmotor units - Bioelectric
Minimum-Norm Source Localization
Invert a noisy EEG lead matrix with Tikhonov regularization, inspect resolution and L-curves, and expose source-model mismatch.
Chapter 7MNETikhonov - Bioelectric
Bioelectric Uncertainty, Stimulation & EIT
Build a GUM interval budget, test the chronaxie energy optimum, and reconstruct small conductivity changes from a discrete EIT forward model.
Chapter 7Chapter 8 bridgeGUM