The fly connectome

3 lessons in this topic.

• Every neuron, in one male fly Chapter 1 · 16 min

  The 2026 male map holds 166,691 neurons and about 125 million synapses. See how slices become a graph, and why three files give three different counts.

• The diagram is a list of who may speak to whom Chapter 2 · 18 min

  Run the real map on a CPU, watch half a second of spikes, then check the sentences that travelled online against the file on disk.

• Run a slice of the map in your browser Chapter 3 · 20 min

  The same Rust integrator, compiled to WebAssembly, stepping real neurons at 0.1 ms. Drive the leg motor pool, cut its inhibition, and check the browser against the native run by hash.