{"id":61694,"date":"2016-05-13T11:04:29","date_gmt":"2016-05-13T18:04:29","guid":{"rendered":"https:\/\/www.chronobiology.com\/unraveling-mysteries-biological-rhythms-suprachiasmatic-nucleus\/"},"modified":"2024-07-19T12:57:57","modified_gmt":"2024-07-19T19:57:57","slug":"desentra-ar-los-misterios-de-nuestros-ritmos-biol-gicos-el-n-cleo-supraquiasm-tico","status":"publish","type":"post","link":"https:\/\/dev.chronobiology.com\/es\/desentra-ar-los-misterios-de-nuestros-ritmos-biol-gicos-el-n-cleo-supraquiasm-tico\/","title":{"rendered":"Desentra\u00f1ar los misterios de nuestros ritmos biol\u00f3gicos: El n\u00facleo supraquiasm\u00e1tico"},"content":{"rendered":"<p>El n\u00facleo supraquiasm\u00e1tico, o SCN, se considera el \u00abreloj maestro\u00bb del cuerpo humano. Comprender el SCN es clave para desvelar los secretos del reloj interno del cuerpo.<\/p>\n<p>El n\u00facleo supraquiasm\u00e1tico es la fuente de nuestros ritmos biol\u00f3gicos innatos y coordina diversos procesos fisiol\u00f3gicos con los niveles ambientales de luz y oscuridad. A pesar de su importancia, hasta ahora se sab\u00eda poco sobre c\u00f3mo recibe y sintetiza la informaci\u00f3n esta zona del cerebro. Sin embargo, los cient\u00edficos est\u00e1n empezando a comprender mejor el funcionamiento de nuestros relojes internos gracias a un nuevo estudio en el que se ha utilizado una neurotoxina de una fuente sorprendente: el pez globo.<\/p>\n<h2>La sincronizaci\u00f3n del cerebro<\/h2>\n<p>Cuando las retinas perciben la luz, transmiten informaci\u00f3n a los centros visuales del cerebro. Sin embargo, tambi\u00e9n env\u00edan mensajes a <a href=\"http:\/\/www.hhmi.org\/biointeractive\/human-suprachiasmatic-nucleus\" target=\"_blank\" rel=\"noopener\">una zona del hipot\u00e1lamo llamada n\u00facleo supraquiasm\u00e1tico<\/a>. Situada justo encima del quiasma \u00f3ptico, esta peque\u00f1a secci\u00f3n del hipot\u00e1lamo est\u00e1 emparejada (una a cada lado) y tiene forma de ala. Como la mayor\u00eda de las zonas del cerebro, el SCN est\u00e1 repleto de neuronas. Estas neuronas reciben se\u00f1ales de los ojos, las procesan y env\u00edan se\u00f1ales que mantienen el cerebro y el cuerpo funcionando al mismo ritmo.<\/p>\n<p>El n\u00facleo supraquiasm\u00e1tico est\u00e1 \u00edntimamente implicado en la producci\u00f3n y liberaci\u00f3n de hormonas, el ciclo sue\u00f1o-vigilia, la regulaci\u00f3n de la temperatura y otras muchas tareas fisiol\u00f3gicas importantes. Cuando esta zona se ve comprometida, como ocurre en los trastornos cerebrales degenerativos como la <a href=\"https:\/\/www.chronobiology.com\/sleeping-on-your-side-could-reduce-risk-of-alzheimers-and-parkinsons\/\" target=\"_blank\" rel=\"noopener\">enfermedad<\/a> de Alzheimer, el resultado es una alteraci\u00f3n del <a href=\"https:\/\/www.chronobiology.com\/about-chronobiology\/#CircadianRhythm\" target=\"_blank\" rel=\"noopener\">ritmo circadiano<\/a> y la consiguiente p\u00e9rdida de los patrones normales de sue\u00f1o.<\/p>\n<h2>El SCN y sus relojes internos<\/h2>\n<p>Desgraciadamente, ha sido dif\u00edcil determinar con exactitud c\u00f3mo funciona el SCN porque su complejo funcionamiento est\u00e1 relacionado con varias actividades diferentes. Cada c\u00e9lula de esta zona del cerebro genera su propio ritmo con cada \u00abtic-tac\u00bb del reloj interno del cuerpo. Denominados \u00abmicrorritmos\u00bb, se suman para controlar el ritmo biol\u00f3gico de diversas maneras. En ausencia de luz, la gl\u00e1ndula pineal es inducida a producir melatonina, mientras que en presencia de luz, el cerebro induce a las gl\u00e1ndulas suprarrenales a producir cortisol. Estas hormonas tambi\u00e9n interact\u00faan con el metabolismo, permitiendo al cuerpo coordinar las actividades con la vigilia y el sue\u00f1o. El constante ajetreo del SCN dificulta la medici\u00f3n de la actividad debido al \u00abruido\u00bb constante.<\/p>\n<h2>El pez globo y la actividad cerebral<\/h2>\n<p><a href=\"https:\/\/www.chronobiology.com\/wp-content\/uploads\/2016\/05\/unraveling-the-mysteries-of-our-biological-rhythms-the-suprachiasmatic-nucleus.jpg\"><img decoding=\"async\" class=\"alignright size-medium wp-image-9064\" src=\"https:\/\/www.chronobiology.com\/wp-content\/uploads\/2016\/05\/unraveling-the-mysteries-of-our-biological-rhythms-the-suprachiasmatic-nucleus-300x199.jpg\" alt=\"Unraveling the Mysteries of our Biological Rhythms: The Suprachiasmatic Nucleus\" width=\"300\" height=\"199\" srcset=\"https:\/\/www.chronobiology.com\/wp-content\/uploads\/2016\/05\/unraveling-the-mysteries-of-our-biological-rhythms-the-suprachiasmatic-nucleus-300x200.jpg 300w, https:\/\/www.chronobiology.com\/wp-content\/uploads\/2016\/05\/unraveling-the-mysteries-of-our-biological-rhythms-the-suprachiasmatic-nucleus-768x510.jpg 768w, https:\/\/www.chronobiology.com\/wp-content\/uploads\/2016\/05\/unraveling-the-mysteries-of-our-biological-rhythms-the-suprachiasmatic-nucleus.jpg 800w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a>Para aislar la actividad del n\u00facleo supraquiasm\u00e1tico, <a href=\"http:\/\/www.seas.harvard.edu\/news\/2016\/05\/mapping-circuit-of-our-internal-clock\" target=\"_blank\" rel=\"noopener\">los cient\u00edficos utilizaron una neurotoxina del pez globo<\/a> para detener la comunicaci\u00f3n hacia y desde la regi\u00f3n. Esta toxina <a href=\"http:\/\/www.cdc.gov\/niosh\/ershdb\/emergencyresponsecard_29750019.html\" target=\"_blank\" rel=\"noopener\">bloquea los canales de sodio de los axones nerviosos<\/a>, lo que les impide enviar mensajes a otras zonas del cerebro. Cuando se bloque\u00f3 la entrada y salida del SCN, la actividad oscilatoria en forma de pulso de esta zona del cerebro se volvi\u00f3 ca\u00f3tica e impredecible. Cuando se elimin\u00f3 la neurotoxina, el n\u00facleo supraquiasm\u00e1tico volvi\u00f3 a oscilar siguiendo un patr\u00f3n predecible. Parece que las neuronas del centro del \u00f3rgano marcan el ritmo, enviando mensajes de forma pautada a las neuronas que las rodean y, en menor medida, a otras m\u00e1s lejanas.<\/p>\n<p>\u00bfQu\u00e9 significa esto para la futura investigaci\u00f3n en cronobiolog\u00eda? Ahora que los cient\u00edficos comprenden el modo en que est\u00e1n conectadas las neuronas del SCN, podr\u00e1n averiguar m\u00e1s sobre c\u00f3mo esta enigm\u00e1tica parte del hipot\u00e1lamo gobierna gran parte de nuestra fisiolog\u00eda. Esta comprensi\u00f3n, a su vez, puede conducir a mejores tratamientos para las personas que sufren trastornos del ritmo circadiano y otros trastornos afectados por esta peque\u00f1a secci\u00f3n del cerebro.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>El n\u00facleo supraquiasm\u00e1tico, o SCN, se considera el \u00abreloj maestro\u00bb del cuerpo humano. Comprender el SCN es clave para desvelar los secretos del reloj interno del cuerpo. El n\u00facleo supraquiasm\u00e1tico es la fuente de nuestros ritmos biol\u00f3gicos innatos y coordina diversos procesos fisiol\u00f3gicos con los niveles ambientales de luz y oscuridad. A pesar de su [&hellip;]<\/p>\n","protected":false},"author":15,"featured_media":24387,"comment_status":"open","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":[173,201],"tags":[],"class_list":{"0":"post-61694","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-el-ritmo-circadiano","8":"category-salud-celular","9":"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>Unraveling the Mysteries of our Biological Rhythms: The Suprachiasmatic Nucleus<\/title>\n<meta name=\"description\" content=\"The suprachiasmatic nucleus, or SCN, is considered the \u201cmaster clock\u201d of the human body. 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