{"ok":true,"nota":{"id":"5e9fd5ea84c9f307","slug":"en-el-hipocampo-humano-el-flujo-de-sangre-y-los-latidos-de-los-vasos-c-5e9fd5","titulo":"En el hipocampo humano, el flujo de sangre y los latidos de los vasos cambian con la edad","resumen":"Con resonancia magnética de 7 teslas en 35 adultos jóvenes y mayores, midieron la irrigación y los pulsos de los microvasos del hipocampo. Compararon esos mapas con datos histológicos, eléctricos y genéticos de referencia.","fuente":"biorxiv","fuenteNombre":"bioRxiv · preprints","color":"#be2628","autor":"Guo, F., Kim, A. J., Zhao, C., Dong, T., Liu, Z., Yang, Z., Jann, K., Shao, X., Jahanshad, N., Mather, M., Wang, D. J.","url":"https://www.biorxiv.org/content/10.64898/2026.10.15.759438v1?rss=1","imagen":"/hoy/portada/5e9fd5ea84c9f307","tema":"salud","subtemas":["hipocampo","envejecimiento cerebral","circulación cerebral","resonancia magnética","memoria"],"entidades":["bioRxiv"],"formato":"dato","entretenimiento":false,"pubTs":"2026-10-21T00:00:00.000Z","indexTs":"2026-10-21T10:34:42.642Z","hash":"907133d415b8180ef6957ae0fa9e73fe482d86e14cbfdbe04d1a3968e4cd8d7a","tsa":{"time":"Oct 21 10:35:26 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 del cerebro clave para la memoria, y en 35 personas se vio que la irrigación y los pulsos de sus vasos se organizan de forma distinta según la edad. En los jóvenes, el flujo se corresponde con ciertas neuronas inhibidoras y con ritmos cerebrales específicos. Para alguien de acá, esto sugiere que el deterioro de la memoria con los años podría tener que ver con la circulación fina del cerebro, aunque todavía falta comprobarlo. El estudio es chico y no prueba causa.","quienFirma":"bioRxiv · preprints","confianza":"preprint","consulta":{"pregunta":"¿Qué creés que más pesa en la memoria con los años?"}},"sello":{"hash":"907133d415b8180ef6957ae0fa9e73fe482d86e14cbfdbe04d1a3968e4cd8d7a","sello":"f07761e7946d8f0c70ffbae47bc538e8c8fbdf3c10aa1eee8017668139396763","beacon":{"drand":{"cadena":"8990e7a9aaed2ffed73dbd7092123d6f289930540d7651336225dc172e51b2ce","ronda":6571596,"aleatorio":"2c36e18ae584b00d9a77fc6ee91bac2d1e017f0e506ff9533e9d65bd838a5467","tiempo":"2026-10-21T10:35:00.000Z"},"nist":{"cadena":2,"pulso":1993004,"salida":"23161ED84C8333D8735666F0B82E202695897452E701B068B63EF76A2E59D22F1B819FE2CF27AC06B5894483118E32D36F4246E7C1D82B4789A57D7588B065D3","tiempo":"2026-10-21T10:35:00.000Z"},"noAntes":"2026-10-21T10:35:00.000Z"},"verificacion":{"drand":true,"nist":true},"tsa":{"time":"Oct 21 10:35:26 2026 GMT","provider":"freetsa.org","sobre":"sello"},"original":{"titulo":"Distinct spatial organization of human hippocampal perfusion and microvascular pulsatility across age","descripcion":"Arterial pulsation can modulate neuronal activity through mechanosensitive pathways in mice, but whether vascular pulsatility is similarly related to neural organization in humans remains unclear. Here, using 7T MRI in 35 young and older adults, we mapped cerebral perfusion and microvascular volumetric pulsatility index (mvPI) across the unfolded hippocampus and integrated these measures with histological, electrophysiological, and transcriptomic reference maps. Perfusion and mvPI exhibited distinct spatial organization and age-related differences. In young adults, perfusion preferentially corresponded to parvalbumin-interneuron density and beta/gamma distribution, whereas mvPI was associate","pubDate":"2026-10-21","url":"https://www.biorxiv.org/content/10.64898/2026.10.15.759438v1?rss=1"},"indexado":"2026-10-21T10:34:42.642Z"}}