{"ok":true,"nota":{"id":"7fdd8b1aec55739e","slug":"en-ratones-y-monos-senales-cortas-del-cerebro-cambian-como-se-procesa--7fdd8b","titulo":"En ratones y monos, señales cortas del cerebro cambian cómo se procesa lo que vemos","resumen":"Investigadores estimularon con luz neuronas del locus coeruleus, una zona del tronco encefálico que libera noradrenalina, mientras monos resolvían una tarea visual de comparación. Midieron cómo esos pulsos breves modificaban el desempeño en cada ensayo.","fuente":"biorxiv","fuenteNombre":"bioRxiv · preprints","color":"#be2628","autor":"Ghosh, S., Maunsell, J. H.","url":"https://www.biorxiv.org/content/10.64898/2026.10.21.760810v1?rss=1","imagen":"/hoy/portada/7fdd8b1aec55739e","tema":"ciencia","subtemas":["neurociencia","noradrenalina","percepción visual","optogenética","locus coeruleus"],"entidades":["bioRxiv","locus coeruleus","monos macacos"],"formato":"dato","entretenimiento":false,"pubTs":"2026-10-24T00:00:00.000Z","indexTs":"2026-10-24T15:21:10.758Z","hash":"b853e34dc513fbdfe1446768f2f4bd1f396040bf9ef89a1e60561bd30d44e8c9","tsa":{"time":"Oct 24 15:21:45 2026 GMT","provider":"freetsa.org","sobre":"sello"},"stats":{"views":0,"likes":0,"clicks":0,"dwell":0},"tipo":"motor","registro":"hallazgo","porQueImporta":"El trabajo muestra que una señal química muy breve puede intervenir en la forma en que el cerebro interpreta lo que ve, en lugar de solo ponerlo más alerta. Para alguien de acá, esto ayuda a entender por qué el estado de atención o estrés cambia tanto la percepción diaria. Queda claro que el mecanismo es más fino de lo que se pensaba, aunque todavía se estudia en animales.","quienFirma":"Institución no identificada en el extracto (preprint de bioRxiv)","confianza":"preprint","consulta":{"pregunta":"¿Te sorprende que una señal química tan breve pueda cambiar cómo percibís?"}},"sello":{"hash":"b853e34dc513fbdfe1446768f2f4bd1f396040bf9ef89a1e60561bd30d44e8c9","sello":"4ca85f13424db974038a6fe0ed7f6ade3fd0f6d22f0e808e0b099d57feae4b6e","beacon":{"drand":{"cadena":"8990e7a9aaed2ffed73dbd7092123d6f289930540d7651336225dc172e51b2ce","ronda":6580809,"aleatorio":"3d35063162a4e7d3668b9babf034358bcf06064f5d74d59d17a1cdb95fa80b6d","tiempo":"2026-10-24T15:21:30.000Z"},"nist":{"cadena":2,"pulso":1997598,"salida":"EB07E7F252E8AF18A2554C318A0C5EC75263B6A954197ACB0321A623F27C616EB83954B3A5FCDAD3DE3C057E7D630FAE38061F776F8741FAF3AA8AF72651D6F0","tiempo":"2026-10-24T15:21:00.000Z"},"noAntes":"2026-10-24T15:21:30.000Z"},"verificacion":{"drand":true,"nist":true},"tsa":{"time":"Oct 24 15:21:45 2026 GMT","provider":"freetsa.org","sobre":"sello"},"original":{"titulo":"Transient noradrenergic signals act as online controllers of perceptual computation","descripcion":"Neuromodulatory signals influence perception, arousal and learning, but their effects on behavioral performance can arise from fundamentally different computations. A transient signal could alter a persistent operating state, control an ongoing computation, or provide a teaching signal that modifies future behavior. These mechanisms make distinct predictions about the time course of neuromodulatory influence on behavior within and across trials. Here we applied temporally randomized white-noise optogenetic activation of locus coeruleus (LC) noradrenergic neurons while monkeys performed a visual match-to-sample discrimination task. Computational simulations established that reverse correlatio","pubDate":"2026-10-24","url":"https://www.biorxiv.org/content/10.64898/2026.10.21.760810v1?rss=1"},"indexado":"2026-10-24T15:21:10.758Z"}}