FlyScale (VybFly)

Asks whether you can enlarge a whole-brain wiring diagram and still have it behave like a brain. A hidden geometry is learned for the FlyWire graph, then new neurons are placed near old ones and wired by the learned rule, growing 139,255 neurons and 2,700,513 connections up to 1,392,550 and 27,842,102. Sparsity holds: connections grow as N to the 1.02. The results the authors highlight are the limits. Nothing built here handles delayed or ordered stimuli at any scale, and a mushroom-body model trained on odour-reward learns exactly as well on a shuffled graph.

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#scaling#graph-embedding#mushroom-body#negative-result#paper#flywire