finding
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finding:cryptic-planaria-exhibit-stochastic-but-concordant-head-tail-decisionsCryptic planaria exhibit stochastic but concordant head/tail decisions
Bioelectrical disruption produces planaria forming 2-head or 1-head forms at ~70-30 ratio; randomization occurs at population level, but each worm makes unified decision across all tissues.
Source paper
extracted_from(2024) · Patrick McMillen · Michael Levin
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Claims (2)
claim
- Bioelectric signaling is a primary modality for coordinating cells into morphogenetic collectivessupportsVoltage gradients and gap-junctional communication coordinate large-scale anatomical decisions in development and regeneration, prefiguring neural coordination.
- Authors argue no sharp distinction exists between familiar animal cognition and collective behavior in cells/tissues; same principles apply across scales and substrates.
Communities (3)
community
- Gap junctions and bioelectric signals encode body-plan and memory patterns across radical biological transformation.
- Experimental manipulation of resting membrane potential patterns to stably alter morphogenesis (head number/location) independent of genetic sequence, primarily in Dugesia species 2011-2017.
- Durant et al. 2017 documents fixed ~1:2 frequency of 1-head vs 2-head regeneration in cryptic fragments
Methods (1)
method
- Functional imaging technique used to track bioelectric patterns in regenerating planaria and reveal rules of collective morphospace navigation.
Related by similarity (8)
cosine ≥ 0.65 · no typed edgeEntities in the same semantic neighborhood but without a typed relation to this one — candidates for new edges or unrecognized duplicates.
- Cryptic planaria fragments form 1-head and 2-head forms at a set frequency of ~1:2 (Durant et al. 2017)finding0.797Shows stochastic anatomical outcome at the individual level while all cells in a fragment agree on one morphology.
- Links cognitive and morphogenetic dynamics.
- Interpretive claim explaining planarian robustness as top-down morphogenetic intelligence.
- Demonstrates that anatomical outcomes can be reprogrammed at the bioelectric level independently of DNA, inverting the software/hardware metaphor
- Transient bioelectric perturbation with ion channel drugs/RNAi permanently alters the number of heads regenerated even in subsequent rounds without further treatment, demonstrating bioelectric pattern memory.
- Demonstrates the role of epigenetic bioelectric software.
- A bioelectrically destabilized planarian state where regeneration outcome (1 vs 2 heads) is stochastic per individual, yet all cells within the worm agree.
- From Sullivan et al. 2016 and Emmons-Bell et al. 2015; demonstrates that large morphospace distances can be crossed by physiological manipulation.