Stephen Downes

Knowledge, Learning, Community

Interesting article about behavioral time scale synaptic plasticity (BTSP), which is contrasted with typical Hebbian neural plasticity (which can be summarizes as: 'what wires together fires together') in that it characterizes a type of learning that can happen suddenly, rather than gradually over time. How? That's more of a complex question. "The biggest difference between the dendrites' activity and Hebbian plasticity: time... (their activity potentials) persist for tens to hundreds of milliseconds (sometimes approaching one second), and through BTSP they can strengthen synapses active six to eight seconds before." Before people get too excited at the possibility of one-shot learning: "it has been observed in limited circumstances (and) only in the hippocampus."

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Stephen Downes Stephen Downes, Casselman, Canada
stephen@downes.ca

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Last Updated: Apr 24, 2026 3:42 p.m.

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