{"id":1492,"date":"2026-09-22T06:50:13","date_gmt":"2026-09-22T06:50:13","guid":{"rendered":"https:\/\/tcjsj.com\/?p=1492"},"modified":"2026-09-22T06:50:13","modified_gmt":"2026-09-22T06:50:13","slug":"groundbreaking-brain-imaging-study-links-long-covid-to-damage-in-dopamine-releasing-neurons","status":"publish","type":"post","link":"https:\/\/tcjsj.com\/?p=1492","title":{"rendered":"Groundbreaking Brain Imaging Study Links Long COVID to Damage in Dopamine-Releasing Neurons"},"content":{"rendered":"

A comprehensive new brain imaging study conducted by scientists at the Centre for Addiction and Mental Health (CAMH) has uncovered what researchers are describing as the most compelling and robust evidence to date that long COVID is fundamentally associated with physical damage to dopamine-releasing neurons within the human brain. Published in the peer-reviewed scientific journal eBioMedicine<\/em>, these transformative findings offer critical insight into why millions of individuals suffer from debilitating, persistent symptoms long after their initial acute infection has cleared. <\/p>\n

The newly published research could finally help explain pervasive neurological and psychological hurdles such as fatigue-related loss of motivation, psychomotor slowing, and cognitive memory difficulties. Furthermore, by shining a light on the specific neural mechanisms underlying the condition, these discoveries point directly toward entirely new treatment strategies that could dramatically alter clinical care for patients who have exhausted traditional avenues of support.<\/p>\n

Long COVID remains a widespread public health crisis, estimated to affect approximately five percent of the global population. In Canada alone, the condition impacts roughly two million people. The post-viral syndrome can involve a broad, unpredictable, and exhausting range of symptoms that continue for at least three months after the initial COVID-19 infection. Common neurological and psychological symptoms frequently include profound fatigue, persistent brain fog, debilitating memory problems, and low mood. Despite how widespread and deeply disruptive long COVID can be to daily life, careers, and personal relationships, there are currently no universally accepted, evidence-based treatments available. This therapeutic void exists largely because scientists have continued to grapple with understanding the exact physiological mechanisms occurring inside the central nervous system.<\/p>\n

Brain Scans Reveal Significant Changes in the Dopamine System<\/p>\n

To dive deeper into the neurological underpinnings of the disorder, the CAMH research team utilized positron emission tomography (PET), a sophisticated and highly sensitive imaging technique capable of measuring intricate biological and chemical activity inside the living human brain. Using this technology, they examined a well-established biological marker directly associated with the health, vitality, and structural integrity of dopamine neurons in individuals suffering from long COVID. They then meticulously compared these scans against the baseline results of healthy control participants.<\/p>\n

The scientific team discovered substantially lower levels of this crucial neural health marker in people with long COVID across all major areas of the striatum. The striatum is a complex group of interconnected subcortical brain regions that plays a vital role in helping regulate motivation, voluntary movement, and higher-order thinking and cognition. The observation of lower marker levels strongly suggests a reduced density of functional dopamine nerve terminals, pointing to actual neurobiological degradation in these key areas.<\/p>\n

Crucially, the research revealed that different patterns of marker loss corresponded directly with specific, distinct clinical symptoms reported by patients. Lower marker levels concentrated within the ventral striatum were linked directly to a greater loss of motivation and drive. Meanwhile, reductions observed in the dorsal putamen were closely associated with slower physical movement and motor delays, while lower levels found within the caudate putamen were reliably connected with specific memory difficulties and cognitive lapses.<\/p>\n

"Our findings provide compelling evidence that long COVID involves the loss of dopamine-releasing neurons," says Dr. Jeffrey Meyer, Senior Scientist at the Brain Health Imaging Centre, Canada Research Chair, and senior author of the study. "This kind of injury is well known to produce symptoms like lack of motivation and motor slowing, and may contribute to memory difficulties in other neurological conditions. Our results suggest a similar process is occurring in long COVID."<\/p>\n

Earlier Research Pointed Directly to Brain Inflammation<\/p>\n

These new, ground-breaking findings do not emerge in a vacuum; rather, they build solidly upon previous pioneering work conducted by the very same research team. Earlier studies from the CAMH group demonstrated that individuals suffering from long COVID exhibit unusually high levels of neuroinflammation\u2014or inflammation within the brain tissue. Interestingly, that inflammation appeared to be especially pronounced and concentrated in anatomical regions containing large populations of dopamine-releasing neurons.<\/p>\n

"We know that inflammation can injure dopamine neurons. While our earlier research showed high levels of inflammation in those regions, this study provides direct evidence that the dopamine neuron marker is reduced in the same regions\u2014and that this loss correlates with patients’ symptoms," explains Dr. Meyer.<\/p>\n

When taken together, these two interconnected studies strongly suggest a dangerous, damaging chain reaction linking persistent post-viral brain inflammation directly to structural injury and loss within the dopaminergic system. This progression helps bridge the gap between systemic immune responses triggered by the coronavirus and the lasting neurological damage reported by patients months or even years later.<\/p>\n

A New Direction for Long COVID Treatment<\/p>\n

The implications of these results are profound and could fundamentally shift how the global medical and scientific communities approach both the fundamental biology and the clinical treatment of long COVID. Historically, a vast majority of previous research efforts have centered primarily on general inflammation within the central nervous system and broader changes in immune system activity. By comparison, very few clinical trials or targeted interventions have focused directly on protecting, repairing, or supporting dopamine-releasing neurons.<\/p>\n

"These results indicate that long COVID is, at least in part, a disorder of the brain’s dopamine system," adds Dr. Meyer. "This suggests that repurposing medications that augment the function of dopamine-releasing neurons, including dopamine precursors and inhibitors of dopamine metabolism, could be a promising approach."<\/p>\n

For the millions of people living with long COVID, the publication of these findings may also provide a long-awaited biological explanation and validation for symptoms that can notoriously be difficult to measure, quantify, or observe from the outside, often leading to skepticism from employers, peers, and even healthcare providers.<\/p>\n

"For five years I have been seeking answers on what happened to me after I contracted COVID in 2021," says Susan Deuville, lived experience research advisor to Dr. Meyer. "It was a crushing loss of the life I had and the person I was before. The research of Dr. Meyer brings hope. It also validates what long COVID sufferers have always known\u2014long COVID is real and the effects are devastating."<\/p>\n

Clinical Trial Planned to Target Dopamine Function<\/p>\n

Capitalizing on the momentum of these results, the research team is not resting. They are actively preparing to launch a new clinical trial in the upcoming couple of months. This upcoming study will specifically target dopamine function in individuals struggling with long COVID, with the overarching goal of determining whether medically modifying and supporting dopamine activity can successfully improve memory, restore motivation, and alleviate profound fatigue.<\/p>\n

The upcoming clinical trial will be conducted in close collaboration with the University Health Network (UHN), operating as part of a formal, ongoing partnership between the institutions designed specifically to bridge the traditional historical gap separating mental health care from physical health care. Funding and foundational support for the broader research initiatives have been provided by the Canadian Institutes of Health Research (CIHR). As investigators prepare to move from observational imaging to active therapeutic intervention, patients and clinicians alike look toward the next phase of research with renewed optimism.<\/p>\n","protected":false},"excerpt":{"rendered":"

A comprehensive new brain imaging study conducted by scientists at the Centre for Addiction and Mental Health (CAMH) has uncovered what researchers are describing as the most compelling and robust evidence to date that long COVID is fundamentally associated with physical damage to dopamine-releasing neurons within the human brain. Published in the peer-reviewed scientific journal […]<\/p>\n","protected":false},"author":1,"featured_media":1491,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[455],"tags":[761,2210,2211,457,2212,2207,2208,2209,2119,2214,2213,84,456,458,892],"class_list":["post-1492","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-science","tag-brain","tag-covid","tag-damage","tag-discovery","tag-dopamine","tag-groundbreaking","tag-imaging","tag-links","tag-long","tag-neurons","tag-releasing","tag-research","tag-science","tag-space","tag-study"],"_links":{"self":[{"href":"https:\/\/tcjsj.com\/index.php?rest_route=\/wp\/v2\/posts\/1492","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tcjsj.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tcjsj.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tcjsj.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/tcjsj.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1492"}],"version-history":[{"count":0,"href":"https:\/\/tcjsj.com\/index.php?rest_route=\/wp\/v2\/posts\/1492\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tcjsj.com\/index.php?rest_route=\/wp\/v2\/media\/1491"}],"wp:attachment":[{"href":"https:\/\/tcjsj.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1492"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tcjsj.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1492"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tcjsj.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1492"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}