{"id":37133,"date":"2026-05-18T16:02:00","date_gmt":"2026-05-18T16:02:00","guid":{"rendered":"https:\/\/www.tun.com\/home\/?p=37133"},"modified":"2026-05-18T19:53:20","modified_gmt":"2026-05-18T19:53:20","slug":"how-dehydration-shapes-learning-and-memory-in-the-brain","status":"publish","type":"post","link":"https:\/\/www.tun.com\/home\/how-dehydration-shapes-learning-and-memory-in-the-brain\/","title":{"rendered":"How Dehydration Shapes Learning and Memory in the Brain"},"content":{"rendered":"\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-uagb-blockquote uagb-block-e7eb3fc3 uagb-blockquote__skin-border uagb-blockquote__stack-img-none\"><blockquote class=\"uagb-blockquote\"><div class=\"uagb-blockquote__content\">Researchers at Cold Spring Harbor Laboratory have captured the molecular mechanism behind how brain receptors filter calcium and magnesium ions, shedding new light on learning, memory and a class of severe developmental disorders.<\/div><footer><div class=\"uagb-blockquote__author-wrap uagb-blockquote__author-at-left\"><\/div><\/footer><\/blockquote><\/div>\n\n\n\n<div class=\"wp-block-group is-content-justification-space-between is-nowrap is-layout-flex wp-container-core-group-is-layout-b0ffac9c wp-block-group-is-layout-flex\"><div style=\"font-size:16px\" class=\"has-text-align-left wp-block-post-author\"><div class=\"wp-block-post-author__content\"><p class=\"wp-block-post-author__name\">The University Network<\/p><\/div><\/div>\n\n\n<div class=\"wp-block-uagb-social-share uagb-social-share__outer-wrap uagb-social-share__layout-horizontal uagb-block-ee584a31\">\n<div class=\"wp-block-uagb-social-share-child uagb-ss-repeater uagb-ss__wrapper uagb-block-ec619ce7\"><span class=\"uagb-ss__link\" data-href=\"https:\/\/www.facebook.com\/sharer.php?u=\" tabindex=\"0\" role=\"button\" aria-label=\"facebook\"><span class=\"uagb-ss__source-wrap\"><span class=\"uagb-ss__source-icon\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\"><path d=\"M504 256C504 119 393 8 256 8S8 119 8 256c0 123.8 90.69 226.4 209.3 245V327.7h-63V256h63v-54.64c0-62.15 37-96.48 93.67-96.48 27.14 0 55.52 4.84 55.52 4.84v61h-31.28c-30.8 0-40.41 19.12-40.41 38.73V256h68.78l-11 71.69h-57.78V501C413.3 482.4 504 379.8 504 256z\"><\/path><\/svg><\/span><\/span><\/span><\/div>\n\n\n\n<div class=\"wp-block-uagb-social-share-child uagb-ss-repeater uagb-ss__wrapper uagb-block-32d99934\"><span class=\"uagb-ss__link\" data-href=\"https:\/\/twitter.com\/share?url=\" tabindex=\"0\" role=\"button\" aria-label=\"twitter\"><span class=\"uagb-ss__source-wrap\"><span class=\"uagb-ss__source-icon\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\"><path d=\"M389.2 48h70.6L305.6 224.2 487 464H345L233.7 318.6 106.5 464H35.8L200.7 275.5 26.8 48H172.4L272.9 180.9 389.2 48zM364.4 421.8h39.1L151.1 88h-42L364.4 421.8z\"><\/path><\/svg><\/span><\/span><\/span><\/div>\n\n\n\n<div class=\"wp-block-uagb-social-share-child uagb-ss-repeater uagb-ss__wrapper uagb-block-1d136f14\"><span class=\"uagb-ss__link\" data-href=\"https:\/\/www.linkedin.com\/shareArticle?url=\" tabindex=\"0\" role=\"button\" aria-label=\"linkedin\"><span class=\"uagb-ss__source-wrap\"><span class=\"uagb-ss__source-icon\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 448 512\"><path d=\"M416 32H31.9C14.3 32 0 46.5 0 64.3v383.4C0 465.5 14.3 480 31.9 480H416c17.6 0 32-14.5 32-32.3V64.3c0-17.8-14.4-32.3-32-32.3zM135.4 416H69V202.2h66.5V416zm-33.2-243c-21.3 0-38.5-17.3-38.5-38.5S80.9 96 102.2 96c21.2 0 38.5 17.3 38.5 38.5 0 21.3-17.2 38.5-38.5 38.5zm282.1 243h-66.4V312c0-24.8-.5-56.7-34.5-56.7-34.6 0-39.9 27-39.9 54.9V416h-66.4V202.2h63.7v29.2h.9c8.9-16.8 30.6-34.5 62.9-34.5 67.2 0 79.7 44.3 79.7 101.9V416z\"><\/path><\/svg><\/span><\/span><\/span><\/div>\n<\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">At the heart of every memory you&#8217;ve ever formed, a microscopic gatekeeper has been doing its job. Now, for the first time, scientists have caught it in the act.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Researchers at Cold Spring Harbor Laboratory (CSHL) have uncovered the molecular mechanism by which brain receptors distinguish between two nearly identical ions \u2014 calcium and magnesium \u2014 a process that underlies the brain&#8217;s ability to learn and remember. The findings, <a href=\"https:\/\/www.nature.com\/articles\/s41593-026-02283-3\" target=\"_blank\" rel=\"noopener\" title=\"\">published<\/a> in <em>Nature Neuroscience<\/em>, could reshape the understanding of brain development and a devastating class of genetic disorders.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">The Chemistry of Memory<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The brain&#8217;s learning and memory circuits depend on specialized receptors called NMDARs (N-methyl-D-aspartate receptors). These receptors contain a channel that, under the right conditions, allows calcium ions to pass through. When calcium flows in, it triggers the cellular changes that form new memories and reinforce learning. But before that can happen, a magnesium ion must first be cleared from the channel, where it acts as a kind of plug.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The puzzle that stumped neuroscientists for decades: calcium and magnesium are chemically almost identical. They sit side by side on the periodic table, and they carry the same electrical charge. So how does an NMDAR tell them apart?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The research team, led by Hiro Furukawa and Rubin Steigerwald, suspected the answer had something to do with water \u2014 specifically, the way each ion interacts with surrounding water molecules.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">&#8220;Magnesium attracts water more strongly than calcium,&#8221; Furukawa, a CSHL professor, said in a news release. &#8220;It&#8217;s more difficult to take out water molecules surrounding magnesium than calcium.&#8221;<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">In other words, magnesium holds onto its hydration shell more tightly. That makes it bulkier, effectively too large to pass through the receptor&#8217;s inner filter. Calcium, by shedding its water molecules more easily, can slip through. The idea itself isn&#8217;t new \u2014 scientists had theorized about this hydration-based mechanism since the 1980s. But actually seeing it happen at the molecular level was another matter entirely.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Enter the Asn Cage \u2014 and 50,000 Movies<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The key structure Steigerwald, a postdoctoral researcher, zeroed in on is called the Asn cage, a molecular filter within the NMDAR channel. Using a powerful imaging technique called single-particle cryo-electron microscopy (cryo-EM), the team was able to visualize what happens at this filter in extraordinary detail. They captured magnesium ions sitting outside the cage, surrounded by water molecules, effectively corking the channel.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To generate images with enough clarity to see individual water molecules \u2014 which are in constant motion \u2014 the team compiled millions of frames shot from different angles. That collection of data added up to roughly 50,000 movies. Combined with CSHL&#8217;s high-performance computing infrastructure, the imaging revealed the molecular choreography that had eluded researchers for four decades. The team also confirmed their observations using electrophysiology, a technique that measures electrical activity across cell membranes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The result is what Furukawa calls a sieve. Magnesium, clinging to its water molecules, gets caught at the filter. Calcium, more willing to shed its hydration shell, passes through \u2014 triggering the downstream signaling that encodes learning and memory.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why It Matters Beyond the Lab<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Understanding this mechanism is more than an exercise in basic science. The Asn cage at the center of the discovery is also a site where spontaneous genetic mutations can occur, leading to a group of conditions collectively known as GRIN disorders. These rare but serious developmental disabilities can leave children nonverbal and unable to walk, and many patients experience severe, difficult-to-treat seizures.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For clinicians and researchers working on GRIN disorders, knowing precisely how the Asn cage functions under normal conditions is an essential foundation. If scientists can map how mutations disrupt this filter, they have a clearer target for designing potential therapies.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For college students currently grinding through neuroscience or biochemistry coursework, this research is a vivid reminder of how abstract principles \u2014 ion channels, hydration shells, molecular filters \u2014 translate into something as intimate and human as forming a memory. Every time you study for an exam, recall a friend&#8217;s face, or learn a new skill, NMDARs are at work, relying on the same chemistry that Furukawa&#8217;s team has now made visible.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">The Power of Patience and Technology<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The study also underscores how scientific progress often requires waiting for the right tools to catch up with the right ideas. The hydration hypothesis had been circulating since Ronald Reagan was president. It took the convergence of cryo-EM advances, massive computing power, and meticulous experimental design to finally confirm it.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">That kind of long-arc science rarely makes headlines in real time, but its payoff \u2014 a molecular-level blueprint for learning itself \u2014 is hard to overstate. <\/p>\n\n\n\n<div style=\"height:8px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Source:<\/strong> <a href=\"https:\/\/www.cshl.edu\/dehydrations-role-in-learning-and-memory\/\" target=\"_blank\" rel=\"noopener\" title=\"\">Cold Spring Harbor Laboratory<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Researchers at Cold Spring Harbor Laboratory have captured the molecular mechanism behind how brain receptors filter calcium and magnesium ions, shedding new light on learning, memory and a class of severe developmental disorders.<\/p>\n","protected":false},"author":3,"featured_media":37271,"comment_status":"open","ping_status":"open","sticky":false,"template":"single-no-separators","format":"standard","meta":{"_acf_changed":false,"_uag_custom_page_level_css":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[25],"tags":[2025,2028,2027,2024,760,2026],"class_list":["post-37133","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-science","tag-brain-chemistry","tag-cold-spring-harbor-lab","tag-cryo-em","tag-learning-and-memory","tag-neuroscience","tag-nmda-receptors"],"acf":[],"aioseo_notices":[],"uagb_featured_image_src":{"full":["https:\/\/www.tun.com\/home\/wp-content\/uploads\/2026\/05\/37133-how-dehydration-shapes-learning-and-memory-in-the-brain.png",1536,1024,false],"thumbnail":["https:\/\/www.tun.com\/home\/wp-content\/uploads\/2026\/05\/37133-how-dehydration-shapes-learning-and-memory-in-the-brain-150x150.png",150,150,true],"medium":["https:\/\/www.tun.com\/home\/wp-content\/uploads\/2026\/05\/37133-how-dehydration-shapes-learning-and-memory-in-the-brain-300x200.png",300,200,true],"medium_large":["https:\/\/www.tun.com\/home\/wp-content\/uploads\/2026\/05\/37133-how-dehydration-shapes-learning-and-memory-in-the-brain-768x512.png",768,512,true],"large":["https:\/\/www.tun.com\/home\/wp-content\/uploads\/2026\/05\/37133-how-dehydration-shapes-learning-and-memory-in-the-brain-1024x683.png",1024,683,true],"1536x1536":["https:\/\/www.tun.com\/home\/wp-content\/uploads\/2026\/05\/37133-how-dehydration-shapes-learning-and-memory-in-the-brain.png",1536,1024,false],"2048x2048":["https:\/\/www.tun.com\/home\/wp-content\/uploads\/2026\/05\/37133-how-dehydration-shapes-learning-and-memory-in-the-brain.png",1536,1024,false]},"uagb_author_info":{"display_name":"The University Network","author_link":"https:\/\/www.tun.com\/home\/author\/funky_junkie\/"},"uagb_comment_info":0,"uagb_excerpt":"Researchers at Cold Spring Harbor Laboratory have captured the molecular mechanism behind how brain receptors filter calcium and magnesium ions, shedding new light on learning, memory and a class of severe developmental disorders.","_links":{"self":[{"href":"https:\/\/www.tun.com\/home\/wp-json\/wp\/v2\/posts\/37133","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.tun.com\/home\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tun.com\/home\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tun.com\/home\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tun.com\/home\/wp-json\/wp\/v2\/comments?post=37133"}],"version-history":[{"count":6,"href":"https:\/\/www.tun.com\/home\/wp-json\/wp\/v2\/posts\/37133\/revisions"}],"predecessor-version":[{"id":37206,"href":"https:\/\/www.tun.com\/home\/wp-json\/wp\/v2\/posts\/37133\/revisions\/37206"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.tun.com\/home\/wp-json\/wp\/v2\/media\/37271"}],"wp:attachment":[{"href":"https:\/\/www.tun.com\/home\/wp-json\/wp\/v2\/media?parent=37133"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tun.com\/home\/wp-json\/wp\/v2\/categories?post=37133"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tun.com\/home\/wp-json\/wp\/v2\/tags?post=37133"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}