{"ok":true,"nota":{"id":"bd8a340d0d09763f","slug":"los-implantes-en-la-corteza-visual-no-siempre-ven-puntitos-los-dibujos-bd8a34","titulo":"Los implantes en la corteza visual no siempre ven puntitos: los dibujos de una paciente lo muestran","resumen":"Investigadores compararon los dibujos y descripciones de una persona con un implante cerebral visual con un modelo computacional de su corteza. El modelo reprodujo la variedad de formas que ella reportó al recibir estímulos eléctricos.","fuente":"biorxiv","fuenteNombre":"bioRxiv · preprints","color":"#be2628","autor":"Soo, L., Schoinas, E., Boynton, G. M., Fine, I., Fernandez, E.","url":"https://www.biorxiv.org/content/10.64898/2026.10.18.759925v1?rss=1","imagen":"/hoy/portada/bd8a340d0d09763f","tema":"ciencia","subtemas":["neuroprótesis","corteza visual","implantes cerebrales","visión artificial","modelado computacional"],"entidades":["bioRxiv","corteza V1"],"formato":"dato","entretenimiento":false,"pubTs":"2026-10-20T00:00:00.000Z","indexTs":"2026-10-20T12:15:39.527Z","hash":"09b3c49e7f4b91241f3713dbb053936cdf0dc5e8f7ccd80fd139e19573ce043f","tsa":{"time":"Oct 20 12:17:23 2026 GMT","provider":"freetsa.org"},"stats":{"views":0,"likes":0,"clicks":0,"dwell":0},"tipo":"normal","registro":"hallazgo","porQueImporta":"Hasta ahora se pensaba que cada electrodo producía un destello chiquito, como un punto de luz. Esta paciente vio manchas grandes y formas irregulares, y el modelo logró explicarlo. Para quienes esperan que estos implantes devuelvan algo de visión a personas ciegas, esto obliga a diseñar la estimulación con mucho más cuidado. Ver no va a ser simplemente encender una grilla de puntos, y eso cambia las expectativas de cualquiera que dependa de esta tecnología.","quienFirma":"bioRxiv (preprint; equipo de investigación en neurociencia visual)","confianza":"preprint","consulta":null},"sello":{"hash":"09b3c49e7f4b91241f3713dbb053936cdf0dc5e8f7ccd80fd139e19573ce043f","sello":null,"beacon":null,"verificacion":null,"tsa":{"time":"Oct 20 12:17:23 2026 GMT","provider":"freetsa.org"},"original":{"titulo":"Why phosphenes are not always dots: modeling the shapes elicited 1by intracortical stimulation of human V1","descripcion":"The majority of visual cortical prosthetic devices currently implanted in patients or under development rely on small depth electrodes. Reports from patients implanted with these devices suggest that stimulation with tiny electrodes does not reliably produce small punctate spots, with some patients reporting a variety of percepts, including larger spots and irregularly shaped phosphenes. Here, we compare drawings and descriptions made by a cortical implant recipient to predicted phosphene patterns, generated using a 'virtual patient' simulation based on a simple model of V1. We find that this model successfully reproduces the wide variety of percepts reported by this patient and further sugg","pubDate":"2026-10-20","url":"https://www.biorxiv.org/content/10.64898/2026.10.18.759925v1?rss=1"},"indexado":"2026-10-20T12:15:39.527Z"}}