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Physarum uses an EXTERNALIZED spatial memory — avoidance of its own extracellular slime trail — to escape a U-shaped trap: 96% of trials escaped (n=24) versus 33% when the whole arena was pre-coated with slime so the cue was uninformative.

✓ VERIFIED

Grade E1 · state: verified · id: IB-physarum-extended-memory

Quantities: 96% escape (n=24) vs 33% on slime-pre-coated agar

Primary source

Reid et al. 2012, PNAS

Edges (outgoing)

• relates → Physarum polycephalum encodes the location of a past nutrient stimulus — external slime store operating alongside the internal tube-diameter store

Incoming edges (what points here)

• Physarum polycephalum encodes the location of a past nutrient stimulus — relates → this (internal store (tube diameters) alongside an external store (slime trail) in the same organism)