{"id":329944,"date":"2026-07-15T23:51:56","date_gmt":"2026-07-15T23:51:56","guid":{"rendered":"http:\/\/6a57cef0959f70584b8e0593"},"modified":"2026-07-15T23:51:56","modified_gmt":"2026-07-15T23:51:56","slug":"este-experimento-con-los-codos-revela-por-que-tu-mano-dominante-es-bueno-la-dominante","status":"publish","type":"post","link":"https:\/\/sarmiento24h.com\/?p=329944","title":{"rendered":"Este experimento con los codos revela por qu\u00e9 tu mano dominante es, bueno, la dominante"},"content":{"rendered":"<p>Cuando lanzas una pelota de b\u00e9isbol, lo haces mejor con tu mano dominante, independientemente de si eres diestro o zurdo. Si alguien te pregunta por qu\u00e9, probablemente contestar\u00edas que se debe al sofisticado principio de que esa es la mano que has usado toda tu vida. Durante a\u00f1os, un neurocient\u00edfico probablemente te habr\u00eda corregido. Una hip\u00f3tesis ampliamente aceptada en su campo dice que la superioridad de la mano dominante, izquierda o derecha, proviene del hemisferio cerebral que controla esa mano, el cual tendr\u00eda una especializaci\u00f3n innata para controlar movimientos precisos.<\/p>\n<p>Sin embargo, un reciente estudio publicado en <a href=\"https:\/\/www.pnas.org\/doi\/10.1073\/pnas.2601569123\"><em>PNAS<\/em><\/a> aporta evidencia a favor de una explicaci\u00f3n distinta: la superioridad de la mano dominante podr\u00eda ser, sobre todo, el resultado de d\u00e9cadas de pr\u00e1ctica utilizando herramientas y objetos que exigen controlar trayectorias complejas.<\/p>\n<h2>La prueba del codo<\/h2>\n<p>Los cient\u00edficos buscaron una manera de enfrentar ambas explicaciones. Recurrieron a un experimento fuera de lo com\u00fan: pidieron a los participantes escribir con los codos. Sujetaron un bol\u00edgrafo a cada brazo y les pidieron escribir la letra \u00abA\u00bb y el n\u00famero \u00ab8\u00bb.<\/p>\n<p>La l\u00f3gica es simple. Si la mano dominante es m\u00e1s h\u00e1bil gracias a una ventaja innata del <a href=\"https:\/\/es.wired.com\/articulos\/el-cerebro-no-nace-siendo-un-lienzo-en-blanco\">cerebro<\/a> para controlar movimientos precisos, esa superioridad tambi\u00e9n aparecer\u00e1 al escribir con el codo del lado dominante. Pero si la diferencia es el resultado de toda una vida de pr\u00e1ctica, ambos codos deber\u00edan desempe\u00f1arse igual de mal, porque nadie aprende a escribir con ellos.<\/p>\n<p>Los resultados fueron consistentes con su hip\u00f3tesis. La escritura con las manos mostr\u00f3 la esperada ventaja del lado dominante, pero al escribir con los codos esa diferencia desapareci\u00f3. Incluso cuando entrenaron a otro grupo de voluntarios para escribir utilizando esa articulaci\u00f3n, ambos codos mejoraron pr\u00e1cticamente al mismo ritmo.<\/p>\n<p>Para los autores, el resultado <strong>sugiere que la habilidad asociada a la mano dominante no depende de una ventaja general del hemisferio cerebral que la controla<\/strong>, sino de la experiencia acumulada practicando tareas espec\u00edficas.<\/p>\n<hr>\n<div class=\"ContentCardEmbedWrapper-hkvhYu kMYDit content-card-embed content-card-embed--stacked\" data-testid=\"ContentCardEmbedWrapper\" readability=\"20.867088607595\">\n<div class=\"ContentCardEmbedImage-bqahne fjmzkP content-card-embed__image\" data-testid=\"ContentCardEmbedImage\"><span class=\"SpanWrapper-kFnjvc eKnjjD responsive-asset\"><picture class=\"ResponsiveImagePicture-jKunQM gjCCFj responsive-image\"><img decoding=\"async\" alt=\"Un concepto de los dos hemisferios cerebrales\" loading=\"lazy\" class=\"ResponsiveImageContainer-dkeESL cQPiWi responsive-image__image\" srcset=\"https:\/\/media.es.wired.com\/photos\/682276ed15c4603fd30e7bf8\/master\/w_120,c_limit\/GettyImages-1457560866%20(1).jpg 120w, https:\/\/media.es.wired.com\/photos\/682276ed15c4603fd30e7bf8\/master\/w_240,c_limit\/GettyImages-1457560866%20(1).jpg 240w, https:\/\/media.es.wired.com\/photos\/682276ed15c4603fd30e7bf8\/master\/w_320,c_limit\/GettyImages-1457560866%20(1).jpg 320w, https:\/\/media.es.wired.com\/photos\/682276ed15c4603fd30e7bf8\/master\/w_640,c_limit\/GettyImages-1457560866%20(1).jpg 640w\" sizes=\"100vw\" src=\"https:\/\/media.es.wired.com\/photos\/682276ed15c4603fd30e7bf8\/master\/w_775%2Cc_limit\/GettyImages-1457560866%2520(1).jpg\"><\/picture><\/span><\/div>\n<div class=\"ContentCardEmbedInfo-buyHWH gWLOee\" readability=\"21.860759493671\">\n<div class=\"BaseText-fEwdHD ContentCardEmbedHed-kDKGDs iUENtL dlHXUJ content-card-embed__hed\" data-testid=\"ContentCardEmbedHed\"><a class=\"BaseLink-haTOKm ContentCardEmbedHedLink-iBZsco ILkR hhUFQU content-card-embed__hed-link link\" href=\"https:\/\/es.wired.com\/articulos\/es-hora-de-dejar-de-creer-que-el-cerebro-tiene-un-lado-creativo-y-uno-analitico\" data-testid=\"ContentCardEmbedHedLink\">Es hora de dejar de creer que el cerebro tiene un lado creativo y uno anal\u00edtico<\/a><\/div>\n<p>El cerebro funciona como una m\u00e1quina que integra informaci\u00f3n de ambos hemisferios para obtener ventajas biol\u00f3gicas y la vista es el mejor ejemplo de ello.<\/p>\n<\/div>\n<\/div>\n<hr>\n<p>\u201cNo se prefiere la mano dominante porque sea m\u00e1s h\u00e1bil. Se vuelve m\u00e1s h\u00e1bil porque uno la prefiere. Y no se notar\u00eda ninguna diferencia entre ambas manos sin las herramientas y los objetos del mundo que requieren pr\u00e1ctica para usarlos correctamente\u201d, resume John Krakauer, uno de los autores del estudio, en <a href=\"https:\/\/www.eurekalert.org\/news-releases\/1134293?utm_source=chatgpt.com\">un comunicado.<\/a><\/p>\n<p>El experimento del codo fue la evidencia m\u00e1s intuitiva, pero no la \u00fanica. En otra serie de pruebas, los investigadores compararon el desempe\u00f1o de ambos brazos durante movimientos normales, con una pesa en la mu\u00f1eca y utilizando una vara ligera. Si la teor\u00eda cl\u00e1sica era correcta, aumentar la dificultad f\u00edsica del movimiento deb\u00eda favorecer a\u00fan m\u00e1s al brazo dominante. Sin embargo, la diferencia apareci\u00f3 sobre todo cuando los participantes utilizaron la herramienta, un resultado que tambi\u00e9n apunt\u00f3 hacia la importancia de la experiencia.<\/p>\n<h2>\u00bfUna ventaja que se aprende?<\/h2>\n<p>Tomados en conjunto, ambos experimentos apuntan en la misma direcci\u00f3n: la superioridad de la mano dominante parece surgir menos de una ventaja general del cerebro para controlar el movimiento y m\u00e1s de las habilidades espec\u00edficas que acumulamos durante a\u00f1os usando herramientas, escribiendo o manipulando objetos con nuestra mano preferida.<\/p>\n<p>\u201cDado que los humanos somos usuarios y fabricantes de herramientas excepcionalmente prol\u00edficos, la <a href=\"https:\/\/es.wired.com\/articulos\/un-estudio-investiga-por-que-todavia-hay-zurdos-en-el-mundo-resulta-que-son-mas-competitivos-que-los-diestros\">lateralidad manual<\/a> podr\u00eda ser un subproducto de nuestra inventiva. La lateralidad manual puede considerarse una huella dactilar de la cultura humana del uso de herramientas\u201d, agrega Ahmet Arac, otro de los autores.<\/p>\n<p>Los propios autores reconocen que el debate sigue abierto. Proponen repetir este tipo de experimentos en personas zurdas, pacientes que han tenido que cambiar de mano dominante y usuarios de pr\u00f3tesis, donde la biolog\u00eda y la experiencia podr\u00edan separarse con mayor claridad. Pero si su interpretaci\u00f3n es correcta, cada firma, cada dibujo y cada objeto que aprendimos a manipular desde la infancia habr\u00edan hecho mucho m\u00e1s por nuestra destreza que una ventaja innata del cerebro.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Cuando lanzas una pelota de b\u00e9isbol, lo&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":329945,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[46],"tags":[],"class_list":["post-329944","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tecnologia"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - 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