{"ok":true,"nota":{"id":"67c5ce103716cd38","slug":"el-cerebro-recuerda-de-dos-maneras-distintas-segun-cuanto-tiempo-paso-67c5ce","titulo":"El cerebro recuerda de dos maneras distintas según cuánto tiempo pasó","resumen":"Un estudio con electrodos finos en el hipocampo humano encontró que la forma en que se guarda una imagen define si la persona la reconoce al rato o al cabo de mucho tiempo. Las neuronas que se activan al principio anticipan qué recuerdo quedará.","fuente":"biorxiv","fuenteNombre":"bioRxiv · preprints","color":"#be2628","autor":"Tallman, C. W., Wixted, J. T., Steinmetz, P. N.","url":"https://www.biorxiv.org/content/10.64898/2026.10.21.759719v1?rss=1","imagen":"/hoy/portada/67c5ce103716cd38","tema":"ciencia","subtemas":["memoria","hipocampo","neurociencia","recuerdos","aprendizaje"],"entidades":["bioRxiv","hipocampo humano"],"formato":"dato","entretenimiento":false,"pubTs":"2026-10-26T00:00:00.000Z","indexTs":"2026-10-26T23:22:05.517Z","hash":"1d67a38c53d2e7e24183ae6e20b827302ed393a24318081bf39d384551ba60e2","tsa":{"time":"Oct 26 23:22:43 2026 GMT","provider":"freetsa.org","sobre":"sello"},"stats":{"views":0,"likes":0,"clicks":0,"dwell":0},"tipo":"motor","registro":"hallazgo","porQueImporta":"El hipocampo es la zona clave para guardar recuerdos, y este trabajo muestra que memorizar algo para unos minutos y para toda la vida usa mecanismos diferentes. Para quien estudia, rinde exámenes o intenta retener algo importante, significa que repasar sin comprender no alcanza igual. Lo que se graba al principio es lo que después vas a poder recuperar.","quienFirma":"Universidad no especificada en el resumen (preprint de neurociencia de la memoria)","confianza":"preprint","consulta":{"pregunta":"¿Cómo estudiás para retener lo que aprendés?"}},"sello":{"hash":"1d67a38c53d2e7e24183ae6e20b827302ed393a24318081bf39d384551ba60e2","sello":"4caba243f09f062a9e4c21a0a59582565a7c6c698331da7417321422aab42f45","beacon":{"drand":{"cadena":"8990e7a9aaed2ffed73dbd7092123d6f289930540d7651336225dc172e51b2ce","ronda":6587531,"aleatorio":"fe6a0d1e32f33530ee3865ce898a933a679d836c030556cafcf9f7f9e03e9c1f","tiempo":"2026-10-26T23:22:30.000Z"},"nist":{"cadena":2,"pulso":2000959,"salida":"38EFC3652F96D1340187DD7D5B32A840F878CD33000D34F2E88A92400DF1FC86B990B57549F5A1FBF1EAABF05D417E628C2ED1C646A08A636235AA53F1954B2D","tiempo":"2026-10-26T23:22:00.000Z"},"noAntes":"2026-10-26T23:22:30.000Z"},"verificacion":{"drand":true,"nist":true},"tsa":{"time":"Oct 26 23:22:43 2026 GMT","provider":"freetsa.org","sobre":"sello"},"original":{"titulo":"Encoding activity predicts distinct recognition signals during working and long-term memory in the human hippocampus","descripcion":"Neurocomputational models predict that episodic memories are represented by sparse, pattern-separated hippocampal codes. Recognition within working memory capacity may instead rely on overlapping cortical codes. We analyzed human intracranial microwire recordings during a continuous recognition task to test whether retrieval demand and spiking activity at encoding determine which neural signal is expressed. We show that relative increases in firing from pre-stimulus to post-stimulus onset at encoding predicted an item-specific signal that was present only in the hippocampus and only during long-term memory retrieval of remembered items. In contrast, consistently elevated firing predicted a g","pubDate":"2026-10-26","url":"https://www.biorxiv.org/content/10.64898/2026.10.21.759719v1?rss=1"},"indexado":"2026-10-26T23:22:05.517Z"}}