{"id":48402,"date":"2020-03-23T12:00:50","date_gmt":"2020-03-23T18:00:50","guid":{"rendered":"https:\/\/askthescientists.com\/neuroscience\/"},"modified":"2022-07-20T15:12:48","modified_gmt":"2022-07-20T21:12:48","slug":"neuroscience","status":"publish","type":"post","link":"https:\/\/askthescientists.com\/fr\/neuroscience\/","title":{"rendered":"La neuroscience simplifi\u00e9e : l\u2019exploration de quatre concepts cl\u00e9s de la science du cerveau"},"content":{"rendered":"<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-48389\" src=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2020\/03\/292290073.jpg\" alt=\"\" width=\"835\" height=\"501\" srcset=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2020\/03\/292290073.jpg 835w, https:\/\/askthescientists.com\/wp-content\/uploads\/2020\/03\/292290073-400x240.jpg 400w, https:\/\/askthescientists.com\/wp-content\/uploads\/2020\/03\/292290073-768x461.jpg 768w, https:\/\/askthescientists.com\/wp-content\/uploads\/2020\/03\/292290073-705x423.jpg 705w\" sizes=\"(max-width: 835px) 100vw, 835px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Pas besoin d\u2019\u00eatre un neuroscientifique pour comprendre la base du fonctionnement du cerveau. Bien entendu, le centre de commande de l\u2019organisme est complexe \u2013 il se passe beaucoup de choses \u00e0 l\u2019int\u00e9rieur du cr\u00e2ne. Cependant, une poign\u00e9e de concepts cl\u00e9s peuvent vous aider \u00e0 acqu\u00e9rir une connaissance pratique des notions fondamentales li\u00e9es \u00e0 la puissance c\u00e9r\u00e9brale.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Commencez \u00e0 exercer vos muscles c\u00e9r\u00e9braux en d\u00e9couvrant quatre concepts de base en neuroscience.<\/span><\/p>\n<h2><b>La m\u00e9canique derri\u00e8re la puissance c\u00e9r\u00e9brale\u00a0\u00a0<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Pr\u00e8s de 100\u00a0milliards (100\u00a0000\u00a0000\u00a0000) de neurones se tassent dans le cerveau. Chaque neurone est reli\u00e9 \u00e0 d\u2019autres, cr\u00e9ant ainsi un r\u00e9seau comprenant au total des milliers de milliards de connexions. Cette toile massive et complexe fait du cerveau le puissant ordinateur central qu\u2019il est et lui donne la capacit\u00e9 de g\u00e9rer tout ce qui lui parvient. Il doit en effet r\u00e9fl\u00e9chir, r\u00e9agir, se rappeler et contr\u00f4ler tous les aspects de votre vie.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Mais comment s\u2019y prend-il exactement? La complexit\u00e9 rend la compr\u00e9hension difficile. Toutefois, la connaissance des diff\u00e9rentes parties du cerveau et une m\u00e9taphore simple peuvent aider \u00e0 \u00e9claircir les myst\u00e8res de la m\u00e9canique c\u00e9r\u00e9brale.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Les neurones dans le cerveau ressemblent \u00e0 une souche d\u2019arbre, avec un corps cellulaire (appel\u00e9 le soma) et des racines qui s\u2019\u00e9tendent tout autour. Les racines d\u2019un arbre servent \u00e0 la collecte \u2013 elles s\u2019enfoncent dans le sol pour y puiser de l\u2019eau et des nutriments. Les racines qui sortent du corps cellulaire, pour leur part, servent \u00e0 la collecte et \u00e0 la communication. <\/span><\/p>\n<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-48377\" src=\"https:\/\/askthescientists.com\/wp-content\/uploads\/2020\/03\/AdobeStock_290162954.jpg\" alt=\"\" width=\"400\" height=\"240\" \/><\/p>\n<p><span style=\"font-weight: 400;\">C\u2019est pourquoi les neurones ont deux types d\u2019extensions \u2013 des dendrites et un axone. Les dendrites recueillent l\u2019information et re\u00e7oivent les signaux en provenance des autres neurones, tandis que l\u2019axone transmet des messages \u00e0 l\u2019aide de neurotransmetteurs, des compos\u00e9s chimiques sp\u00e9cialis\u00e9s.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Les synapses sont les interfaces o\u00f9 les messages sont transmis. Ce sont ces connexions entre la terminaison axonale d\u2019un neurone et les dendrites d\u2019un autre qui rendent la communication dans le cerveau possible.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Chaque neurone est comme un petit r\u00e9seau de t\u00e9l\u00e9vision. Les journalistes et les r\u00e9alisateurs sont comme les dendrites : ils vont vers les sources d\u2019information, recueillent les faits et rassemblent les nouvelles. Le chef d\u2019antenne qui diffuse les nouvelles est comme l\u2019axone : il communique les messages en provenance du r\u00e9seau de nouvelles (ou dans cet exemple, du neurone).<\/span><\/p>\n<p><span style=\"font-weight: 400;\">L\u2019ensemble de cette communaut\u00e9 interconnect\u00e9e qui partage l\u2019information permet au cerveau de rester \u00e0 jour et de communiquer de mani\u00e8re fluide.<\/span><\/p>\n<h2><b>Explorer la capacit\u00e9 d\u2019adaptation par la neuroplasticit\u00e9<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Le cerveau absorbe une quantit\u00e9 \u00e9norme de donn\u00e9es chaque minute de chaque journ\u00e9e. Votre environnement, vos \u00e9motions et les autres circonstances autour de vous sont constamment en \u00e9volution. Le cerveau doit donc s\u2019adapter \u00e0 toute cette information et cet \u00e9tat de perp\u00e9tuelle transition.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">La neuroplasticit\u00e9 d\u00e9crit l\u2019incroyable flexibilit\u00e9 du cerveau.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Cette habilet\u00e9 va bien au-del\u00e0 de la capacit\u00e9 \u00e0 changer d\u2019opinion sur un sujet. La neuroplasticit\u00e9 englobe l\u2019ensemble des adaptations physiques effectu\u00e9es par le cerveau qui proc\u00e8de au rec\u00e2blage des connexions entre les neurones et les r\u00e9seaux neuronaux. Par la neuroplasticit\u00e9, la puissance c\u00e9r\u00e9brale permet, au besoin, de relocaliser l\u2019endroit dans le cerveau o\u00f9 s\u2019accomplissent certaines t\u00e2ches. (\u00c0 ne pas confondre la neuroplasticit\u00e9 et la neurogen\u00e8se qui est le processus par lequel de nouveaux neurones sont cr\u00e9\u00e9s.)<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Il a \u00e9t\u00e9 montr\u00e9 que de nombreuses circonstances peuvent d\u00e9clencher la r\u00e9organisation qui s\u2019effectue par neuroplasticit\u00e9. Les blessures physiques, de m\u00eame qu\u2019un traumatisme ou un stress \u00e9motif peuvent amorcer le changement. Des situations plut\u00f4t positives, comme l\u2019apprentissage et l\u2019am\u00e9lioration de l\u2019environnement, peuvent \u00e9galement stimuler la neuroplasticit\u00e9.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Vous savez que votre cerveau va s\u2019adapter. Toutefois, vous pouvez favoriser ce rec\u00e2blage \u00e0 l\u2019aide d\u2019habitudes positives.<\/span><\/p>\n<h2><b>Les fonctions ex\u00e9cutives favorisent le d\u00e9veloppement mental\u00a0<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Votre capacit\u00e9 \u00e0 profiter pleinement de la vie au quotidien d\u00e9pend en grande partie de l\u2019ensemble des comp\u00e9tences cognitives que l\u2019on appelle les fonctions ex\u00e9cutives. Ces comp\u00e9tences doivent \u00eatre apprises et acquises \u2013 car elles ne sont pas pleinement d\u00e9velopp\u00e9es \u00e0 la naissance.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Elles comprennent\u00a0:<\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400;\"> Le d\u00e9placement de l\u2019attention<\/span><\/li>\n<li><span style=\"font-weight: 400;\"> La ma\u00eetrise des impulsions<\/span><\/li>\n<li><span style=\"font-weight: 400;\"> La r\u00e9gulation des comportements<\/span><\/li>\n<li><span style=\"font-weight: 400;\"> L\u2019\u00e9valuation des cons\u00e9quences avant de passer \u00e0 l\u2019action<\/span><\/li>\n<li><span style=\"font-weight: 400;\"> Le maintien de la concentration<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Les fonctions ex\u00e9cutives vous permettent \u00e9galement de jongler avec des id\u00e9es abstraites avant d\u2019en arriver \u00e0 des conclusions concr\u00e8tes. En outre, elles englobent la m\u00e9moire de travail, la flexibilit\u00e9 mentale et certains aspects de la capacit\u00e9 \u00e0 r\u00e9soudre des probl\u00e8mes de mani\u00e8re cr\u00e9ative.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">M\u00eame si ce concept est nouveau pour vous, il ne l\u2019est pas pour votre cerveau. Vous avez utilis\u00e9 vos fonctions ex\u00e9cutives pour r\u00e9ussir votre scolarit\u00e9. Elles vous ont assist\u00e9 dans l\u2019accomplissement de vos objectifs de mise en forme. Vos fonctions ex\u00e9cutives vous ont m\u00eame aid\u00e9 \u00e0 g\u00e9rer vos \u00e9motions pendant les p\u00e9riodes d\u00e9licates ou difficiles. Maintenant, vous savez comment les nommer.<\/span><\/p>\n<h2><b>M\u00e9moire de travail et m\u00e9moire \u00e0 court terme<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">D\u00e9finir ce qu\u2019est la m\u00e9moire peut para\u00eetre simple. C\u2019est ce dont on se souvient, n\u2019est-ce pas? La capacit\u00e9 de stockage du cerveau. Ce dont on arrive \u00e0 se souvenir au besoin.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Pourtant, la m\u00e9moire est loin d\u2019\u00eatre un concept aussi simple. Commen\u00e7ons donc par d\u00e9finir et diff\u00e9rencier les principaux types de m\u00e9moire.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Le terme m\u00e9moire \u00e0 long terme s\u2019explique de lui-m\u00eame et il se distingue ais\u00e9ment de la m\u00e9moire \u00e0 court terme et de la m\u00e9moire de travail. Si une information est stock\u00e9e pour plus d\u2019une minute, il s\u2019agit probablement de m\u00e9moire \u00e0 long terme. La comparaison entre la m\u00e9moire de travail et de la m\u00e9moire \u00e0 court terme demande un peu plus d\u2019attention.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">La m\u00e9moire \u00e0 court terme est la capacit\u00e9 \u00e0 se souvenir d\u2019une petite quantit\u00e9 d\u2019information pendant moins d\u2019une minute. \u00catre en mesure de garder un num\u00e9ro \u00e0 l\u2019esprit pendant assez longtemps pour pouvoir l\u2019\u00e9crire est un exemple de m\u00e9moire \u00e0 court terme. Cependant, on oublie une grande partie de ce qui est stock\u00e9 dans la m\u00e9moire \u00e0 court terme.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">La m\u00e9moire de travail a une capacit\u00e9 limit\u00e9e, mais elle agit comme canal de circulation pour l\u2019information en provenance des sens vers la m\u00e9moire \u00e0 court terme et la m\u00e9moire \u00e0 long terme. Elle ram\u00e8ne \u00e9galement \u00e0 votre attention des \u00e9l\u00e9ments entrepos\u00e9s dans la m\u00e9moire \u00e0 long terme et les m\u00e9lange avec les stimuli en pr\u00e9sence afin de vous aider \u00e0 accomplir les t\u00e2ches qui vous occupent.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Cuisiner votre plat pr\u00e9f\u00e9r\u00e9 est un bon exemple de m\u00e9moire de travail. Vous puisez les ingr\u00e9dients, les proportions et le temps de cuisson dans votre m\u00e9moire \u00e0 long terme, mais votre m\u00e9moire de travail vous aide \u00e0 terminer le repas en m\u00e9langeant ce que vous voyez, ce que vous entendez et ce que vous sentez avec les donn\u00e9es contenues dans la recette. Cela vous aide \u00e0 accomplir la recette correctement \u2013 cuisson ad\u00e9quate, sans ingr\u00e9dients suppl\u00e9mentaires ou incorrects.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Quelle est donc la principale diff\u00e9rence entre la m\u00e9moire de travail et la m\u00e9moire \u00e0 court terme? La m\u00e9moire de travail vous permet de manipuler les souvenirs et les stimuli tandis que la m\u00e9moire \u00e0 court terme est simplement un lieu d\u2019entreposage temporaire.\u00a0<\/span><\/p>\n<h2><b>Quelle sera la prochaine d\u00e9couverte de votre exploration des neurosciences?<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Il ne s\u2019agit que de la pointe de l\u2019iceberg, mais maintenant que vous en savez un peu plus sur ces sujets, vous pouvez \u00e9largir vos connaissances avec ces <\/span><a href=\"https:\/\/askthescientists.com\/fr\/brain-facts\/\"><span style=\"font-weight: 400;\">faits int\u00e9ressants sur le cerveau<\/span><\/a><span style=\"font-weight: 400;\">.<\/span><span style=\"font-weight: 400;\">\u00a0Ou encore, peut-\u00eatre le temps est-il venu pour vous de passer \u00e0 l\u2019action. Commencez \u00e0 <\/span><a href=\"https:\/\/askthescientists.com\/fr\/nutrients-brain-health\/\"><span style=\"font-weight: 400;\">nourrir votre cerveau avec les bons aliments<\/span><\/a><span style=\"font-weight: 400;\">, et <\/span><a href=\"https:\/\/askthescientists.com\/fr\/cognitive-skills\/\"><span style=\"font-weight: 400;\">d\u00e9terminez votre point de d\u00e9part pour vous aider \u00e0 suivre le progr\u00e8s de vos comp\u00e9tences cognitives<\/span><\/a><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Peu importe o\u00f9 cette voie inconnue vous m\u00e8nera, vous comprenez comment votre cerveau va s\u2019adapter, la mani\u00e8re dont les neurones faciliteront la communication de la nouvelle information et comment les faits seront stock\u00e9s dans votre m\u00e9moire.<\/span><\/p>\n<div  class='togglecontainer av-11yj4uo-f906f2a41705b3de41c4dff249ac0d6f  avia-builder-el-0  avia-builder-el-no-sibling  toggle_close_all' >\n<section class='av_toggle_section av-jbd6ls-5f4967dd2bbbf2480e6ec59c21f21dba'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div role=\"tablist\" class=\"single_toggle\" data-tags=\"{All} \"  ><p id='toggle-toggle-id-1' data-fake-id='#toggle-id-1' class='toggler  av-title-above '  itemprop=\"headline\"  role='tab' tabindex='0' aria-controls='toggle-id-1' data-slide-speed=\"200\" data-title=\"&lt;span style=&quot;font-weight: 400;&quot;&gt;R\u00e9f\u00e9rences&lt;\/span&gt;\" data-title-open=\"\" data-aria_collapsed=\"Click to expand: &lt;span style=&quot;font-weight: 400;&quot;&gt;R\u00e9f\u00e9rences&lt;\/span&gt;\" data-aria_expanded=\"Click to collapse: &lt;span style=&quot;font-weight: 400;&quot;&gt;R\u00e9f\u00e9rences&lt;\/span&gt;\"><span style=\"font-weight: 400;\">R\u00e9f\u00e9rences<\/span><span class=\"toggle_icon\"><span class=\"vert_icon\"><\/span><span class=\"hor_icon\"><\/span><\/span><\/p><div id='toggle-id-1' aria-labelledby='toggle-toggle-id-1' role='region' class='toggle_wrap  av-title-above'  ><div class='toggle_content invers-color '  itemprop=\"text\" ><p><a href=\"https:\/\/www.aans.org\/en\/Patients\/Neurosurgical-Conditions-and-Treatments\/Anatomy-of-the-Brain\"><span style=\"font-weight: 400;\">https:\/\/www.aans.org\/en\/Patients\/Neurosurgical-Conditions-and-Treatments\/Anatomy-of-the-Brain<\/span><\/a><\/p>\n<p><a href=\"https:\/\/www.verywellmind.com\/what-is-cognition-2794982\"><span style=\"font-weight: 400;\">https:\/\/www.verywellmind.com\/what-is-cognition-2794982<\/span><\/a><\/p>\n<p><a href=\"https:\/\/www.dana.org\/explore-neuroscience\/brain-basics\/key-brain-terms-glossary\/\"><span style=\"font-weight: 400;\">https:\/\/www.dana.org\/explore-neuroscience\/brain-basics\/key-brain-terms-glossary\/<\/span><\/a><\/p>\n<p><a href=\"https:\/\/www.ninds.nih.gov\/Disorders\/Patient-Caregiver-Education\/Know-Your-Brain\"><span style=\"font-weight: 400;\">https:\/\/www.ninds.nih.gov\/Disorders\/Patient-Caregiver-Education\/Know-Your-Brain<\/span><\/a><\/p>\n<p><a href=\"https:\/\/learn.genetics.utah.edu\/content\/memory\/types\/\"><span style=\"font-weight: 400;\">https:\/\/learn.genetics.utah.edu\/content\/memory\/types\/<\/span><\/a><\/p>\n<p><a href=\"https:\/\/www.scientificamerican.com\/article\/working-memory-how-you-keep-things-ldquo-in-mind-rdquo-over-the-short-term\/\"><span style=\"font-weight: 400;\">https:\/\/www.scientificamerican.com\/article\/working-memory-how-you-keep-things-ldquo-in-mind-rdquo-over-the-short-term\/<\/span><\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC2657600\/\"><span style=\"font-weight: 400;\">https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC2657600\/<\/span><\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC4084861\/\"><span style=\"font-weight: 400;\">https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC4084861\/<\/span><\/a><\/p>\n<p><a href=\"https:\/\/developingchild.harvard.edu\/science\/key-concepts\/executive-function\/\"><span style=\"font-weight: 400;\">https:\/\/developingchild.harvard.edu\/science\/key-concepts\/executive-function\/<\/span><\/a><\/p>\n<p><a href=\"https:\/\/www.dana.org\/article\/how-does-the-brain-work\/\"><span style=\"font-weight: 400;\">https:\/\/www.dana.org\/article\/how-does-the-brain-work\/<\/span><\/a><\/p>\n<p><a href=\"https:\/\/www.ninds.nih.gov\/Disorders\/Patient-Caregiver-Education\/Life-and-Death-Neuron\"><span style=\"font-weight: 400;\">https:\/\/www.ninds.nih.gov\/Disorders\/Patient-Caregiver-Education\/Life-and-Death-Neuron<\/span><\/a><\/p>\n<p><a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC4960264\/\"><span style=\"font-weight: 400;\">https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC4960264\/<\/span><\/a><\/p>\n<\/div><\/div><\/div><\/section>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Pas besoin d\u2019\u00eatre un neuroscientifique pour comprendre la base du fonctionnement du cerveau. Bien entendu, le centre de commande de l\u2019organisme est complexe \u2013 il se passe beaucoup de choses \u00e0 l\u2019int\u00e9rieur du cr\u00e2ne. Cependant, une poign\u00e9e de concepts cl\u00e9s peuvent vous aider \u00e0 acqu\u00e9rir une connaissance pratique des notions fondamentales li\u00e9es \u00e0 la puissance [&hellip;]<\/p>\n","protected":false},"author":4638,"featured_media":48392,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[284],"tags":[20729],"class_list":["post-48402","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nutrition_spotlight-fr","tag-cognitive-functions-fr"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>La neuroscience simplifi\u00e9e : l\u2019exploration de quatre concepts cl\u00e9s de la science du cerveau - Ask The Scientists<\/title>\n<meta name=\"description\" content=\"Explorez les fondements de la neuroscience par la vulgarisation de quatre concepts appartenant \u00e0 la science du cerveau afin de vous aider \u00e0 augmenter votre puissance c\u00e9r\u00e9brale.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/askthescientists.com\/fr\/neuroscience\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La neuroscience simplifi\u00e9e : l\u2019exploration de quatre concepts cl\u00e9s de la science du cerveau - 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