{"ok":true,"nota":{"id":"aa58802e4e68d502","slug":"en-personas-que-tuvieron-un-acv-el-cerebro-reacciona-mas-fuerte-y-mas--aa5880","titulo":"En personas que tuvieron un ACV, el cerebro reacciona más fuerte y más tarde al perder el equilibrio","resumen":"Compararon la actividad cerebral de 16 personas con ACV crónico y 15 sin ACV, todas mayores, cuando un piso se movía de golpe para sacarlas de equilibrio. Midieron cómo cambiaba la respuesta del cerebro según la intensidad del empujón y si la persona lograba dar un paso para recuperarse.","fuente":"medrxiv","fuenteNombre":"medRxiv · preprints","color":"#1f7a4d","autor":"Palmer, J. A., Ting, L. H., Borich, M. R., Payne, A., Mirdamadi, J.","url":"https://www.medrxiv.org/content/10.64898/2026.10.21.26366125v1?rss=1","imagen":"/hoy/portada/aa58802e4e68d502","tema":"salud","subtemas":["accidente cerebrovascular","equilibrio","rehabilitacion","neurociencia","adultos mayores"],"entidades":["medRxiv"],"formato":"dato","entretenimiento":false,"pubTs":"2026-10-23T00:00:00.000Z","indexTs":"2026-10-23T18:12:31.737Z","hash":"be7d6fc39b0b2dd4138ae417e3b5c88ef27eaaa4c8c7f0af888f4ae29a9c8d81","tsa":{"time":"Oct 23 18:13:42 2026 GMT","provider":"freetsa.org","sobre":"sello"},"stats":{"views":0,"likes":0,"clicks":0,"dwell":0},"tipo":"normal","registro":"hallazgo","porQueImporta":"Las personas que sobrevivieron a un ACV suelen tener más riesgo de caerse, y entender cómo su cerebro responde al desequilibrio ayuda a diseñar mejores ejercicios de rehabilitación. El estudio sugiere que la respuesta cerebral de estos pacientes es menos flexible: no se adapta bien a cada empujón. Para alguien de acá que está recuperándose de un ACV, esto explica por qué la rehabilitación del equilibrio tiene que ser muy específica y no alcanza con hacer ejercicios generales. Aun así, la muestra es chica y no permite sacar conclusiones definitivas.","quienFirma":"Preprint en medRxiv (institución principal no identificada en el resumen)","confianza":"preprint","consulta":null},"sello":{"hash":"be7d6fc39b0b2dd4138ae417e3b5c88ef27eaaa4c8c7f0af888f4ae29a9c8d81","sello":"9daae7110dd58ce11c286b6d9066e257947a7ee9d6b76cdfbc46b774de6c4385","beacon":{"drand":{"cadena":"8990e7a9aaed2ffed73dbd7092123d6f289930540d7651336225dc172e51b2ce","ronda":6578272,"aleatorio":"e504aca3fcd7243fddbec8b88f1c51dc96cb1f827ccda23c013f3b302f3c69ab","tiempo":"2026-10-23T18:13:00.000Z"},"nist":{"cadena":2,"pulso":1996329,"salida":"880EE1B503674E57D0E81D7CEC0FFDBB3A3BB5CD5A62E05BB575BBCB9E2DB29F611799CDCF1B120D62E8DF3A39AE0D1B9935A0A198FC708C5974107E51CFF0C4","tiempo":"2026-10-23T18:12:00.000Z"},"noAntes":"2026-10-23T18:13:00.000Z"},"verificacion":{"drand":true,"nist":true},"tsa":{"time":"Oct 23 18:13:42 2026 GMT","provider":"freetsa.org","sobre":"sello"},"original":{"titulo":"Greater scaling and less flexible timing of cortical responses during challenging reactive balance after stroke","descripcion":"Background: Cortical N1 responses to balance perturbations are larger and earlier with increasing magnitude and differ with reactive stepping. Whether stroke alters this modulation is unknown. Objective: To compare N1 modulation across perturbation magnitudes and reactive balance outcomes in older adults with and without stroke. We hypothesized that people with stroke would show greater N1 scaling than controls; that larger N1s at small perturbations would limit scaling (a recruitment ceiling); and that stroke would constrain N1 modulation by stepping outcome. Methods: Sixteen people with chronic stroke (66+/-11 years) and 15 age-similar controls (68+/-8 years) received forward support-surfa","pubDate":"2026-10-23","url":"https://www.medrxiv.org/content/10.64898/2026.10.21.26366125v1?rss=1"},"indexado":"2026-10-23T18:12:31.737Z"}}