{"id":63213,"date":"2023-12-14T06:23:49","date_gmt":"2023-12-14T14:23:49","guid":{"rendered":"https:\/\/www.chronobiology.com\/how-stress-activates-the-neurons-that-affect-sleep\/"},"modified":"2024-07-21T23:04:35","modified_gmt":"2024-07-22T06:04:35","slug":"c-mo-el-estr-s-activa-las-neuronas-que-afectan-al-sue-o","status":"publish","type":"post","link":"https:\/\/dev.chronobiology.com\/es\/c-mo-el-estr-s-activa-las-neuronas-que-afectan-al-sue-o\/","title":{"rendered":"C\u00f3mo el estr\u00e9s activa las neuronas que afectan al sue\u00f1o"},"content":{"rendered":"<p><a href=\"https:\/\/www.biorxiv.org\/content\/10.1101\/2022.11.30.518589v2\" target=\"_blank\" rel=\"noopener\">Una<\/a> nueva <a href=\"https:\/\/www.biorxiv.org\/content\/10.1101\/2022.11.30.518589v2\" target=\"_blank\" rel=\"noopener\">investigaci\u00f3n demuestra<\/a> que las neuronas del hipot\u00e1lamo pre\u00f3ptico -la regi\u00f3n del cerebro que regula el sue\u00f1o y la temperatura corporal- se activan r\u00edtmicamente durante el sue\u00f1o sin movimientos oculares r\u00e1pidos (NREM). Seg\u00fan un estudio publicado en Current Biology de la Facultad de Medicina Perelman de la Universidad de Pensilvania, el estr\u00e9s activa estas c\u00e9lulas cerebrales de forma incontrolada, provocando \u00abmicrodespertares\u00bb que interrumpen los ciclos de sue\u00f1o y acortan la duraci\u00f3n de los episodios de sue\u00f1o.<\/p>\n<h2>Qu\u00e9 ocurre en el cerebro durante el sue\u00f1o<\/h2>\n<p>Mientras nuestro cuerpo descansa durante <a href=\"https:\/\/www.chronobiology.com\/how-poor-sleep-ages-you\/\" target=\"_blank\" rel=\"noopener\">el<\/a> sue\u00f1o, nuestro cerebro sigue muy activo en cuatro fases diferentes del sue\u00f1o. En cada ciclo de sue\u00f1o de 90 minutos, hay tres etapas de sue\u00f1o NREM y una etapa de sue\u00f1o REM (movimientos oculares r\u00e1pidos). Mientras que el sue\u00f1o REM se caracteriza por movimientos oculares r\u00e1pidos, en la fase no REM hay una actividad decreciente en el cerebro, en la que los m\u00fasculos se relajan cada vez m\u00e1s hasta que finalmente se produce el <a href=\"https:\/\/www.chronobiology.com\/why-its-important-to-get-enough-deep-sleep\/\" target=\"_blank\" rel=\"noopener\">sue\u00f1o profundo<\/a>. Investigaciones anteriores han demostrado que una amplia red de <a href=\"https:\/\/www.cell.com\/current-biology\/fulltext\/S0960-9822(20)30091-9?_returnURL=https%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS0960982220300919%3Fshowall%3Dtrue\" target=\"_blank\" rel=\"noopener\">neuronas<\/a> productoras de neurotensina <a href=\"https:\/\/www.cell.com\/current-biology\/fulltext\/S0960-9822(20)30091-9?_returnURL=https%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS0960982220300919%3Fshowall%3Dtrue\" target=\"_blank\" rel=\"noopener\">interviene en la regulaci\u00f3n del sue\u00f1o NREM<\/a>. Estas neuronas suelen expresar el gen que codifica el neurop\u00e9ptido neurotensina. La activaci\u00f3n de estas neuronas desencadena el sue\u00f1o no REM.<\/p>\n<p><a href=\"https:\/\/www.chronobiology.com\/wp-content\/uploads\/2023\/12\/shutterstock_227580421.jpg\"><img decoding=\"async\" class=\"alignright wp-image-54871 size-medium\" title=\"Mri,Image,Of,Head,Showing,Brain\" src=\"https:\/\/www.chronobiology.com\/wp-content\/uploads\/2023\/12\/shutterstock_227580421-300x228.jpg\" alt=\"Mri,Image,Of,Head,Showing,Brain\" width=\"300\" height=\"228\" srcset=\"https:\/\/dev.chronobiology.com\/wp-content\/uploads\/2023\/12\/shutterstock_227580421-300x228.jpg 300w, https:\/\/dev.chronobiology.com\/wp-content\/uploads\/2023\/12\/shutterstock_227580421-768x584.jpg 768w, https:\/\/dev.chronobiology.com\/wp-content\/uploads\/2023\/12\/shutterstock_227580421.jpg 1000w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a>Durante las dos primeras etapas del sue\u00f1o NREM, las ondas cerebrales, la frecuencia cardiaca y la respiraci\u00f3n se ralentizan, y la temperatura corporal desciende. La segunda fase tambi\u00e9n incluye actividades cerebrales \u00fanicas denominadas husos y complejos K, que son breves r\u00e1fagas de actividad responsables del procesamiento de est\u00edmulos externos y la consolidaci\u00f3n de la memoria. En la tercera fase del ciclo de sue\u00f1o NREM, el cuerpo libera hormonas del crecimiento, que son importantes para reparar el organismo, mantener sano el sistema inmunitario y mejorar a\u00fan m\u00e1s la <a href=\"https:\/\/www.chronobiology.com\/poor-sleep-affects-focus-concentration-and-memory-recollection\/\" target=\"_blank\" rel=\"noopener\">memoria<\/a>. Durante la tercera fase, las ondas cerebrales son m\u00e1s grandes y se denominan ondas delta. El sue\u00f1o REM, que se produce durante este periodo en el que normalmente se sue\u00f1a, tambi\u00e9n es crucial para la formaci\u00f3n de la memoria, el procesamiento emocional y el desarrollo del cerebro. Cuando dormimos mal, notamos que nuestra memoria no es tan buena como de costumbre o que nuestras emociones se vuelven locas. Esto es a\u00fan m\u00e1s pronunciado en personas con trastornos del sue\u00f1o relacionados con el estr\u00e9s.<\/p>\n<p>Comprender la biolog\u00eda que impulsa la actividad cerebral durante estas fases cruciales del sue\u00f1o y c\u00f3mo est\u00edmulos como el estr\u00e9s pueden alterarlas es fundamental para que alg\u00fan d\u00eda puedan desarrollarse terapias que ayuden a las personas a conseguir el sue\u00f1o m\u00e1s reparador que sus cerebros necesitan para poder completar estos importantes procesos.<\/p>\n<h2>Desarrollo de tratamientos para los trastornos del sue\u00f1o relacionados con el estr\u00e9s<\/h2>\n<p>Los investigadores de la Universidad de Pensilvania monitorizaron la actividad en el \u00e1rea pre\u00f3ptica (POA) del<a href=\"https:\/\/www.chronobiology.com\/brain-cells-in-the-hypothalamus-govern-aging-according-to-new-research\/\" target=\"_blank\" rel=\"noopener\"> hipot\u00e1lamo<\/a> de ratones durante su sue\u00f1o natural y descubrieron que las neuronas glutamat\u00e9rgicas (VGLUT2) se activan r\u00edtmicamente durante el sue\u00f1o NREM. Tambi\u00e9n descubrieron que las neuronas VGLUT2 eran m\u00e1s activas durante la vigilia y menos activas durante el sue\u00f1o NREM y REM. Durante las microactivaciones del sue\u00f1o NREM, las neuronas VGLUT2 eran las \u00fanicas neuronas activas dentro del POA, y sus se\u00f1ales empezaban a aumentar en el periodo anterior a la microactivaci\u00f3n. Para confirmar que las neuronas VGLUT2 activas eran realmente la causa del microdespertar, los investigadores estimularon las neuronas VGLUT2 en sujetos dormidos, lo que produjo inmediatamente un aumento del microdespertar y de la vigilia.<\/p>\n<p>Para ilustrar la relaci\u00f3n entre <a href=\"https:\/\/www.chronobiology.com\/stress-affects-sleep-and-vice-versa-heres-what-you-can-do\/\" target=\"_blank\" rel=\"noopener\">el estr\u00e9s<\/a> y el aumento de la activaci\u00f3n de las neuronas VGLUT2, los investigadores expusieron a los sujetos a un factor estresante que aumentaba el tiempo de vigilia y las microactivaciones, y reduc\u00eda el tiempo total de sue\u00f1o REM y NREM. Los investigadores tambi\u00e9n descubrieron un aumento de la actividad de las neuronas VGLUT2 durante el sue\u00f1o NREM en los voluntarios estresados. Adem\u00e1s, cuando los investigadores inhibieron las neuronas VGLUT-2, disminuyeron las microactivaciones durante el sue\u00f1o NREM y los episodios de sue\u00f1o NREM fueron m\u00e1s largos. Seg\u00fan los investigadores, las neuronas glutamat\u00e9rgicas del hipot\u00e1lamo constituyen una diana prometedora para desarrollar tratamientos contra los trastornos del sue\u00f1o relacionados con el estr\u00e9s. La capacidad de reducir las interrupciones durante los periodos clave del sue\u00f1o no REM suprimiendo la actividad de VGLUT2 ser\u00eda revolucionaria para las personas que luchan contra las alteraciones del sue\u00f1o debidas a trastornos como el insomnio o el TEPT.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Una nueva investigaci\u00f3n demuestra que las neuronas del hipot\u00e1lamo pre\u00f3ptico -la regi\u00f3n del cerebro que regula el sue\u00f1o y la temperatura corporal- se activan r\u00edtmicamente durante el sue\u00f1o sin movimientos oculares r\u00e1pidos (NREM). Seg\u00fan un estudio publicado en Current Biology de la Facultad de Medicina Perelman de la Universidad de Pensilvania, el estr\u00e9s activa estas [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":54869,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[214],"tags":[],"class_list":{"0":"post-63213","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-sueno","8":"entry"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.4 (Yoast SEO v23.4) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>C\u00f3mo el estr\u00e9s activa las neuronas que afectan al sue\u00f1o &#8211; 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