\n
![\"EarthSnap\"\/](\"https:\/\/www.newsbeep.com\/ie\/wp-content\/uploads\/2025\/09\/earthsnap-banner-news.webp.webp\")
\n<\/a><\/p>\n
That shared signature could help bring clarity to a fragmented field and give researchers a more consistent way to study how these drugs reshape the brain \u2013 and how they might one day support mental health treatment.<\/p>\n
Five psychedelics, same brain patterns<\/p>\n
In brain scans collected during treatments with psilocybin<\/a>, LSD, mescaline, DMT, and ayahuasca, the same altered pattern kept reappearing.<\/p>\n Danilo Bzdok at McGill University<\/a> documented that brain systems loosened internally while distant systems exchanged more signals.<\/p>\n The finding did not erase the differences between these drugs, but it did reveal a common structure underneath experiences often treated as separate.<\/p>\n That makes the next question more precise, because the field now has to explain exactly what those two changes do to the brain.<\/p>\n Brain networks break and reconnect<\/p>\n Inside the brain, functional connectivity \u2013 coordinated activity between regions over time \u2013 keeps visual, movement, and thinking systems sorted into groups.<\/p>\n Under psychedelic drugs<\/a>, many of those within-group links weakened, so networks that normally reinforce themselves held together less tightly.<\/p>\n At the same time, links between different networks increased, letting sensory regions, decision circuits, and self-focused systems share more activity.<\/p>\n Such crossover offers one plausible route to unusual perceptions, racing associations, and the altered sense of meaning many people report.<\/p>\n Bigger studies, better data<\/p>\n Early psychedelic brain studies were often small, sometimes including just 10 to 30 people. That made it hard to tell the difference between real patterns and statistical noise.<\/p>\n This time, researchers took a much bigger approach. They combined 11 datasets from five countries, analyzing more than 500 brain scans from 267 participants.<\/p>\n That larger scale made a big difference. It allowed scientists to compare multiple drugs side by side \u2013 something a single lab would struggle to do under strict research rules.<\/p>\n \u201cThis approach gives us an X-ray view of the entire research community,\u201d said Bzdok.<\/p>\n Brain patterns across psychedelics<\/p>\n Psilocybin and LSD tracked each other most closely, and mescaline usually moved in the same direction across major changes.<\/p>\n DMT often showed stronger overall effects than LSD or psilocybin, yet its smaller sample left wider uncertainty about how reliable those jumps were.<\/p>\n Ayahuasca, which includes DMT<\/a> and other compounds, stood apart more often, likely because its data came from one tiny dataset.<\/p>\n Those differences mattered because the study found a shared core pattern, not proof that every drug produces the same brain state.<\/p>\n Earlier studies often suggested that psychedelics broadly break down brain networks, but this larger analysis paints a more nuanced picture.<\/p>\n Instead of a full breakdown, the strongest evidence points to increased communication between different brain networks.<\/p>\n The team used a Bayesian model \u2013 a statistical method that weighs both strength and consistency \u2013 to sort out which patterns truly repeat.<\/p>\n That approach helps refine earlier claims and gives future research a clearer benchmark for what actually holds up across studies<\/p>\n Deep brain changes<\/p>\n Beyond the brain\u2019s cortex, the most pronounced increases in connectivity involved the caudate and putamen \u2013 deep regions that link sensation, action, and habit.<\/p>\n Those areas receive heavy visual and movement input, so stronger coupling could change how incoming signals guide behavior.<\/p>\n Effects in the thalamus, a relay hub for incoming signals, appeared far less consistent than some smaller studies had suggested.<\/p>\n Overall, the clearest shared pattern may sit in circuits tied to selection and coordination, rather than being spread evenly across the brain.<\/p>\n Why this could help patients<\/p>\n Doctors do not prescribe these drugs from brain scans alone, but better maps can guide safer, more targeted treatment design.<\/p>\n Many mental health medications still act broadly and take time to work, while psychedelics appear to reshape brain activity by triggering a key serotonin-related switch.<\/p>\n \u201cPsychedelics may represent the most promising shift in mental health treatment<\/a> since the 1980s,\u201d said Bzdok.<\/p>\n For now, that promise remains provisional, because this project tracked short-term brain changes in healthy volunteers rather than patient recovery.<\/p>\n Limitations of the study <\/p>\n Every dataset in the analysis came from healthy adults, so the results do not automatically translate to conditions like depression, addiction, or trauma<\/a>.<\/p>\n Different scanners, doses, and timing after dosing also varied, which can blur subtle effects even after careful data cleanup.<\/p>\n Participants also tend to move more while intoxicated, and motion can make distant brain areas seem falsely linked.<\/p>\n Because those problems never disappear completely, the shared pattern looks useful as a benchmark rather than a final answer.<\/p>\n Psychedelics and human health<\/p>\n Psychedelic research nearly stalled after the 1970s, when criminalization and culture-war baggage made rigorous studies far harder to run. <\/p>\n Now that serious trials have returned, researchers need common yardsticks so promising claims do not outrun the evidence. <\/p>\n \u201cFor the first time, we show there\u2019s a common denominator among drugs that we currently consider completely separate,\u201d said Bzdok.<\/p>\n That emerging picture turns a crowded, sometimes contradictory literature into something clearer: psychedelics appear to relax internal brain network<\/a> order while increasing communication between networks. <\/p>\n If later studies keep seeing the same pattern, regulators and clinicians may have a more solid basis for testing these drugs. <\/p>\n Larger, carefully matched trials in patients will ultimately decide whether that brain signature can predict benefits, side effects, or the most effective dose.<\/p>\n The study is published in the journal Nature Medicine<\/a>.<\/p>\n \u2014\u2013<\/p>\n Like what you read? Subscribe to our newsletter<\/a> for engaging articles, exclusive content, and the latest updates.<\/p>\n Check us out on EarthSnap<\/a>, a free app brought to you by Eric Ralls<\/a> and Earth.com.<\/p>\n \u2014\u2013<\/p>\n","protected":false},"excerpt":{"rendered":"Psychedelic drugs were long treated as scientific outliers \u2013 powerful, controversial, and difficult to study. For decades, research…\n","protected":false},"author":2,"featured_media":392481,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[103,61,60],"class_list":{"0":"post-392480","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-health","8":"tag-health","9":"tag-ie","10":"tag-ireland"},"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/posts\/392480","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/comments?post=392480"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/posts\/392480\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/media\/392481"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/media?parent=392480"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/categories?post=392480"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/tags?post=392480"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}![\"Changes](\"https:\/\/www.newsbeep.com\/ie\/wp-content\/uploads\/2026\/04\/five-psychedelics-drugs_similar-brain-pattern-changes_Nature_1s.webp.webp\")
<\/a>Changes in large-scale network functional coupling induced by psychedelic drugs, averaged across 4 drugs and 11 datasets. Credit: Nature Medicine. Click image to enlarge.The brain isn\u2019t breaking down<\/p>\n