{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"90ca4e84cfc5439f72518dd2171aeac8167f59640749287f633638d01a46dae3","created":"2026-10-03T07:17:57Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"ea244e315204eeaa2be7944272896be61327b8df9491d6688d74fab2d4fa6615","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"mechanism","assisted_by":[],"external_id":"bio.neural-criticality.representational-drift","kind":"phenomenon","literature_status":"open","n":"1","parents":[],"plain":"Recordings over weeks show that the neurons responding to a given place or task keep changing, while the animal's behavior stays the same. How the brain reads a stable meaning from a code that keeps changing is unknown.","posed_since":"2013","precise":"In mouse hippocampus and posterior parietal cortex, single-neuron tuning reorganizes over days to weeks at constant behavior (Ziv and co-workers, 2013; Driscoll and co-workers, 2017). Determine the mechanism that keeps the readout stable: drift confined to directions that the readout ignores, continual relearning by downstream circuits, or conserved population geometry; predict the drift rate and its geometry from measured synaptic turnover and plasticity statistics.","problem_ref":null,"references":"","settled_by":"Chronic recordings of a population and its downstream target, with measured synaptic turnover, showing which model predicts the drift statistics and the stability of decoded behavior.","status_note":"","title":"How stable memories survive drifting neural representations","topic_ref":"b8c0dcb1fa176a19eb52e966985f2d4e4b691e14755231f7ecf414ce1a70712a"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"fac0698fbffd49fbafa4211c46cac99c6acd73b82c81a440ce718a4dc175597f","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"334f723386bccde8d5df80872f017f745c12465a72247e563affc02b99ff956c","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"PGgEfQ3ZIvvC6bcBE0ZUHuq2kd-csnUi5MVfgYKy3mUq6BE_EjKtAssM1BYc-imuIvk3DSRjxL-NJ-JC1uESDA"},"schema":"pubphys.envelope/1"},"record_hash":"fac0698fbffd49fbafa4211c46cac99c6acd73b82c81a440ce718a4dc175597f","leaf_index":808}