A small collection of interactive tools, demos, and learning aids built by the lab. Most run entirely in your browser — nothing to install.
A quiz tool to help you learn to recognize seizure dynamotypes — the characteristic onset and offset patterns of seizures. It drills you on the dynamotype taxonomy from Stacey and colleagues’ “Dynamotypes for Dummies” toolbox and atlas.
Launch the dynamotype trainer →
Based on: Sheckler C, Kish K, Walker Z, Barkelew G, Crisp DN, Szuromi MP, Saggio ML, Stacey WC. Dynamotypes for Dummies: A Toolbox, Atlas, and Tutorial for Simulating a Comprehensive Range of Realistic Synthetic Seizures. eNeuro. 2025 Oct 23;12(10):ENEURO.0200-25.2025. doi: 10.1523/ENEURO.0200-25.2025. PMID: 41027733; PMCID: PMC12549069. Code: Dynamotypes-for-Dummies.
Seizures begin and end through distinct dynamical mechanisms, and a landmark idea in computational epilepsy — the Saggio–Jirsa taxonomy of seizure “dynamotypes” — classifies them by the type of bifurcation that switches the brain between resting and oscillating states. There are four ways a seizure can start and four ways it can stop, and each leaves a characteristic fingerprint in the EEG: a sudden jump, a gradual ramp-up in frequency or amplitude, a slowing-down before it stops, and so on.
This tool lets you see why. For each onset and offset type, the left panel shows the phase portrait — the geometry of the system’s possible states, with its fixed points, limit cycles, and flow — while the panel below shows the resulting voltage trace x(t). As the controlling parameter sweeps through its critical value, you watch the state space reorganize and the signal’s signature emerge in lockstep. The bright marker is the system’s current state; its position is projected onto the voltage axis so you can connect “where the system is” to “what the EEG shows.”
How to use it: Toggle between Onset and Offset, then either press Play or drag the timeline handle to scrub through the transition. Slow it down to study the slow regions. Click a single type to see its vector field and labeled equilibria up close, or turn on the Flow swarm to watch how a whole cloud of starting states flows through the bifurcation.
Launch the bifurcation animator →
Based on: Sheckler C, Kish K, Walker Z, Barkelew G, Crisp DN, Szuromi MP, Saggio ML, Stacey WC. Dynamotypes for Dummies: A Toolbox, Atlas, and Tutorial for Simulating a Comprehensive Range of Realistic Synthetic Seizures. eNeuro. 2025 Oct 23;12(10):ENEURO.0200-25.2025. doi: 10.1523/ENEURO.0200-25.2025. PMID: 41027733; PMCID: PMC12549069. Code: Dynamotypes-for-Dummies.