A live simulation of 1,000 neurons, drawn as a population raster — rows are neurons, dots are spikes, time runs right to left.

Each neuron has a preferred direction. Move your cursor and neurons tuned to that direction fire more. Hover any button for a sparse flash from the subpopulation that "represents" it — related buttons share neurons; unrelated ones don't.

Click and hold anywhere to trigger a Reverberating Super Burst — a coordinated wave seen in cultures of stem-cell-derived neurons during early development, thought to help wire networks together. The more you fire them, the more the network bursts on its own.

The strip at the bottom is the summed firing rate — a rough stand-in for a local field potential (LFP). It spikes when an RSB fires.

For the math and neuroscience — tuning curves, Poisson spiking, population codes, decoding — read the deep dive: