Planaria maintain memories and re-imprint them from tail fragments onto newly regenerating brains.

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• Tail fragments of trained planarians retain original learned information, with memories reimprinted on newly-developing brains.finding0.879
  Empirical evidence that memories persist through regeneration; challenges substrate-dependence of identity.
• Trained planarian flatworms regenerating new heads retain memory of learned behaviors, with behavioral engrams imprinted on newly formed brain tissue.finding0.862
  Evidence that memory and anatomical form are tightly linked; information processing enables integration of behavioral and morphological change.
• Planarians derived from tail fragments of trained worms retain original information after brain regenerationfinding0.849
  Behavioral memories in planaria persist through complete brain regeneration, indicating movement of memory across tissues.
• Memory retention in planarian tail fragment regenerationfinding0.843
• Planaria retain conditioned responses after complete brain regenerationfinding0.837
  Worms trained before decapitation re-acquire the memory after regenerating a new brain, showing transfer of information across tissues.
• Planarian fragments regenerating from bioelectrically re-patterned tissue produce permanent two-headed phenotype, demonstrating transient bioelectric states can produce lasting morphological memory changes.finding0.834
  Key evidence that morphogenetic memories are stored in bioelectric circuits and are rewritable via transient voltage state modifications; memory persists across multiple regeneration cycles.
• Planarian Brain Regeneration with Memory Retentionfinding0.833
  Empirical finding that planaria tail fragments retain learned information and imprint memories onto newly regenerated brains.
• Pattern memory in planaria can be re-written non-genetically via transient modification of membrane potential, leading to permanent changes in target morphology.claim0.826
  Summarizes the two-headed planarian phenomenon.