#naturementalhealth — Public Fediverse posts
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DATE: May 23, 2026 at 12:00PM
SOURCE: PSYPOST.ORG** Research quality varies widely from fantastic to small exploratory studies. Please check research methods when conclusions are very important to you. **
-------------------------------------------------TITLE: Brain development patterns predict if childhood ADHD symptoms will fade or persist
URL: https://www.psypost.org/brain-signatures-identify-which-teens-will-outgrow-adhd-symptoms/
Children experiencing attention deficit hyperactivity disorder face symptoms that can persist, emerge, or fade away completely as they grow older. A recent study published in Nature Mental Health revealed that these different symptom paths are physically reflected in how the brain develops during adolescence, specifically in the growth and thinning of certain brain regions. The research highlights the potential for using brain scans to predict future symptom changes and emphasizes the need for long-term monitoring even after medical treatment begins.
Attention deficit hyperactivity disorder, commonly known as ADHD, affects around five percent of children and adolescents worldwide. This developmental condition often results in varying clinical outcomes as children grow into teenagers and young adults. Some individuals continue to experience symptoms into adulthood, while others go through a remitting phase where their symptoms largely fade. Still, others follow an emergent path where behavioral issues actually worsen over time.
Predicting which adolescents will follow which path remains extremely difficult. A central reason for this difficulty is a lack of long-term brain imaging data showing exactly how adolescent brains mature. The physical development of the brain during these transitional years involves intense structural changes, including a major biological process called synaptic pruning.
During synaptic pruning, the brain naturally eliminates unused neural connections to increase mental efficiency. This normal trimming process causes the outer layer of the brain, known as the cerebral cortex, to thin over time. Variations in how quickly or slowly this thinning occurs can fundamentally impact how a person processes information, pays attention, and regulates their emotions later in life.
Qiang Luo, a researcher at Fudan University in China, led an international team of scientists to explore how typical brain maturation maps onto attention deficit hyperactivity disorder. The team wanted to know if specific physical brain changes corresponded to different developmental symptom paths. They also evaluated whether standard medications prescribed for the condition altered those physical brain development paths.
The research team examined longitudinal data from the Adolescent Brain Cognitive Development study. This massive ongoing project tracks thousands of youth in the United States over many years, measuring environmental, physical, and mental health factors. The team focused on a diverse overarching group of 7,436 adolescents who received initial brain scans at roughly ten years of age.
The researchers categorized the adolescents into four distinct groups based on behavioral assessments provided over a subsequent two-year period. A massive control group experienced no elevated psychiatric symptoms. A much smaller persistent group showed high symptom levels at the beginning and the end of the two years. A remitting group started with high symptoms that eventually faded below the diagnostic threshold. Finally, an emergent group started with low symptoms that eventually worsened to clinical levels.
Assessments of the brain scans over time revealed distinct physical signatures for each group. The persistent group exhibited a faster rate of cortical thinning in certain frontal areas of the brain compared to the healthy control group. These specific frontal regions are typically associated with executive functions like complex decision making and cognitive control. An accelerated thinning is linked to deficits in these daily cognitive abilities.
In the emergent group, the brain also showed altered developmental rates. Individuals whose symptoms worsened over time demonstrated a slower rate of cortical thinning in the right posterior cingulate cortex. This region is a key component of the brain’s default mode network, which helps regulate mind-wandering and internal thoughts. By retaining connections that would typically be pruned away, the developing brain might struggle to shift focus outward when required in a classroom or social setting.
The remitting group, on the other hand, displayed a completely different biological signature. Adolescents whose symptoms faded experienced a faster physical volume expansion of the left hippocampus. The hippocampus is a deeper, primitive brain structure heavily involved in memory formation and emotion regulation. As this region grew faster, the adolescents showed corresponding behavioral improvements in school engagement, prosocial behaviors, and sleep quality.
To understand why these structural brain changes were happening, the researchers compared their localized brain maps to spatial gene expression databases. They analyzed which genes are naturally highly active in these specific changing brain regions. They found a strong overlap with genes responsible for organizing cellular synapses and managing chemical messengers like dopamine and serotonin.
This genetic overlap provides a deep biological foundation for the outward behavioral changes observed. It suggests that the physical volume shifts seen on the brain scans are tied to the fundamental cellular processes governing how local neurons communicate with one another. Tracking these physical parameters essentially allows scientists to view genetic activity playing out on a large scale.
The researchers then investigated the role of ongoing medication use in these developmental outcomes. They matched adolescents with similar symptom severity at the start of the study who either received or did not receive medical treatments. The analysis showed that taking prescribed medication initially was not statistically significant in predicting an individual’s eventual entry into the remitting trajectory.
This lack of association between medication and sustained remission is an unexpected finding. Medical treatments for attention deficit hyperactivity disorder are widely recognized as highly effective at managing immediate behavioral symptoms. However, they might not fundamentally alter the underlying physical development of the brain over the long term. The researchers noted that individuals experiencing symptom remission still exhibited some persisting sleep problems and emotional regulation issues.
Following their initial physical analysis, the team tested whether these newly discovered brain signatures could forecast future behaviors. They fed the baseline brain scan data and behavioral scores into a machine learning computer model. The model accurately predicted symptom severity in the participants three years later at age thirteen. The physical brain measurements improved the accuracy of the predictions beyond using simple behavioral checklists alone.
The team subsequently validated their predictive model using completely separate groups of research participants. One validation group consisted of young adults aged twenty-three in a European neuroscience study. The researchers successfully replicated the specific link between hippocampal expansion and fading symptoms across both the young adult group and two other independent clinical samples. Observing this exact same brain expansion pattern in differing age groups bolsters the reliability of the initial finding.
The current study possesses some limitations to keep in mind. Because the research is observational, it cannot prove that the physical changes in the cortex and hippocampus directly cause symptom improvements or deteriorations. The findings only demonstrate a strong correlation between particular physical brain development rates and changing symptom paths over time.
Additionally, the different datasets used varying questionnaires to measure participant behavioral symptoms, which makes exact comparisons across the separate groups slightly complicated. The available information regarding the participants’ complete medication dosing histories was also somewhat limited. The researchers caution against drawing definitive conclusions about long-term drug impacts based purely on parental reports of recent medication usage.
Moving forward, scientists will need to conduct more frequent brain scans over longer periods to capture the true fluid dynamics of brain development. Focusing on lifestyle interventions that naturally influence continuous hippocampus growth, such as consistent aerobic exercise, might aid in creating new non-pharmacological therapies. By identifying the physical brain markers for these symptom paths, researchers have established a biological roadmap for developing targeted interventions aimed at bringing about long-lasting symptom remission.
The study, “Cortical thinning and hippocampal expansion as brain signatures of attention deficit hyperactivity disorder symptom trajectories,” was published in Nature Mental Health and was authored by Wenjie Hou, Daqian Zhu, Barbara J. Sahakian, Samuele Cortese, Christelle Langley, Lizhu Luo, Qingyang Li, Zixin Gu, Luolong Cao, Gareth J. Barker, Arun L. W. Bokde, Rüdiger Brühl, Sylvane Desrivières, Herta Flor, Hugh Garavan, Penny Gowland, Antoine Grigis, Andreas Heinz, Jean-Luc Martinot, Marie-Laure Paillère Martinot, Eric Artiges, Frauke Nees, Dimitri Papadopoulos Orfanos, Luise Poustka, Michael N. Smolka, Sarah Hohmann, Nathalie Holz, Nilakshi Vaidya, Henrik Walter, Robert Whelan, Gunter Schumann, Li Yang, Tobias Banaschewski, Qiang Luo, and the IMAGEN Consortium.
URL: https://www.psypost.org/brain-signatures-identify-which-teens-will-outgrow-adhd-symptoms/
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#psychology #counseling #socialwork #psychotherapy @psychotherapist @psychotherapists @psychology @socialpsych @socialwork @psychiatry #mentalhealth #psychiatry #healthcare #depression #psychotherapist #ADHDdevelopment #Brain maturation #Corticalthinning #Hippocampalexpansion #Synapticpruning #Executivefunction #Neuroimaging #NatureMentalHealth #ADHDpredictivemodel #Longtermoutcomes
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DATE: May 22, 2026 at 04:00PM
SOURCE: PSYPOST.ORG** Research quality varies widely from fantastic to small exploratory studies. Please check research methods when conclusions are very important to you. **
-------------------------------------------------TITLE: Wildfire smoke linked to rising pediatric mental health emergencies
URL: https://www.psypost.org/wildfire-smoke-linked-to-rising-pediatric-mental-health-emergencies/
Fine particulate matter from wildfires is associated with a rise in mental health emergencies among children and teenagers, according to a recent multi-country analysis. The researchers observed that emergency department visits for conditions like anxiety, depression, and schizophrenia increased after days with higher wildfire smoke exposure. These results were detailed in a paper published in Nature Mental Health.
Fine particulate matter consists of microscopic droplets and bits of ash suspended in the air. These particles are incredibly small, measuring about thirty times smaller than the width of a single human hair. Because of their tiny size, they can be inhaled deeply into the lungs and easily pass into the bloodstream.
Children and teenagers are uniquely vulnerable to this type of air pollution. Young people breathe a higher volume of air relative to their body size compared to adults. They also have less efficient bodily systems for detoxifying harmful chemicals, and their rapidly developing brains are highly sensitive to environmental stressors.
Smoke generated by wildfires is different from the usual air pollution found in cities. Wildfire smoke contains a higher concentration of oxidative compounds and toxic chemicals created by burning vegetation and organic matter. The particles in wildfire smoke also tend to be smaller than those from car exhaust, allowing them to travel farther in the wind and penetrate deeper into human tissues.
The study was led by Yiwen Zhang, a public health researcher at Monash University in Australia. The research was jointly supervised by Monash University epidemiologists Yuming Guo and Shanshan Li. The research team initiated the project to better understand how physical exposure to smoke affects the brain.
Many previous studies on wildfires have focused on the psychological trauma of surviving a disaster. The researchers wanted to isolate the specific biological impact of inhaling the pollution itself, rather than the stress of the fire event. Examining the air pollution allows for a more precise measurement of how the dose of smoke relates to sudden changes in mental health.
The researchers analyzed hospital records from 2004 to 2019 across Australia, Brazil, and Canada. The massive dataset included more than 3.1 million emergency department visits for youths under the age of twenty. To estimate smoke exposure, the team used advanced computer atmospheric models and machine learning programs to separate wildfire smoke from general urban pollution across 845 different communities.
The team employed a time-stratified, self-controlled study design. They compared the local air quality on the exact day a child visited the hospital to the air quality on similar days in the same month when that child did not need emergency care. This method allowed the researchers to hold constant individual family traits, such as genetics or socioeconomic status, throughout the study period.
The analysis revealed a consistent association between spikes in wildfire smoke and hospital visits for pediatric mental health issues. For every extra microgram of wildfire particles per cubic meter of air, emergency department visits for all mental health conditions increased by 1.4 percent. This elevated risk lingered over the six days following the initial smoke exposure.
The strength of this association varied noticeably across different psychiatric conditions. Diagnoses of schizophrenia showed the strongest response, with a 3.7 percent increase in emergency visits following smoke exposure. Emergency visits for anxiety arose by 3 percent, while depression-related visits increased by 2.6 percent.
The research team estimated the total annual burden of these smoke events on the healthcare system. Across the three countries, wildfire smoke contributed to an estimated 22,459 mental health emergency visits each year over the study period. Out of all the air pollution-related mental health visits, smoke from wildfires was responsible for a disproportionately large share given how rarely fires occur compared to daily urban pollution.
The researchers noticed that certain demographic groups faced higher risks. Boys experienced a stronger association between smoke and general mental health disorders compared to girls. However, girls showed a higher risk specifically for schizophrenia emergencies during heavy smoke days.
Age also played a role in how children reacted to the environmental hazard. Young children under the age of five experienced a heightened vulnerability across most mental health categories. The researchers noted that mental health conditions in very young children are rarely recognized early, mostly because symptoms often appear as behavioral outbursts or physical complaints.
Socioeconomic factors modified the risk of a mental health emergency heavily. Communities with lower average incomes and highly urbanized areas experienced a much higher burden of smoke-linked hospital visits. Frequent exposure to regular, non-wildfire air pollution also made children more vulnerable when a sudden wave of wildfire smoke rolled into their neighborhood.
Among the three tested countries, the geographical differences were striking. The association between wildfire smoke and mental health emergencies was highest in Brazil. Meanwhile, the data from Canada did not yield a statistically significant connection for the youth population.
The researchers suspect this discrepancy involves a combination of chronic stress, inequality, and healthcare access. Brazil frequently experiences massive agricultural and forest fires, creating sharp spikes in severe pollution. That country also faces high income inequality, and the public healthcare system lacks the resources to treat the vast majority of severe mental health cases.
The biological mechanisms underlying the link between smoke and mental health are an active area of investigation. When tiny particles enter the brain, they might trigger inflammation and disrupt the biological barrier that protects the central nervous system from toxins. The pollution might also interfere with the complex hormone systems that regulate mammalian stress responses.
Aside from direct chemical irritation, the air pollution could worsen mental health through indirect pathways. Thick smoke alters weather patterns, reduces ambient sunlight, and often keeps children trapped indoors. These environmental shifts can easily disrupt sleep schedules, and poor sleep is a well-established trigger for various emotional and psychological disorders.
The authors noted several limitations regarding their dataset and analysis methods. The study only included data from three nations, meaning the findings might not represent the entire global population completely. The researchers also relied on average air pollution levels across entire communities, which could mask differences in individual exposure.
Certain families might stay indoors, run air purifiers, or live in better-sealed homes, altering their true pollution intake. Because the grid resolution of the atmospheric models cannot capture every local variation, the scientists believe their current estimates of the health risks might actually be on the conservative side. Diagnosing mental health in toddlers is also notoriously difficult, meaning the true number of young children affected might be underreported.
Future research on climate hazards will require more detailed tracking of individual patients. Additional studies could incorporate localized exposure sensors to provide more exact measurements of what children are breathing. Investigators also hope to examine how other climate-driven stressors, such as extreme heat and climate anxiety, combine with air pollution to shape the well-being of future generations.
The study, “Wildfire-sourced fine particulate matter and mental disorders in children and adolescents,” was authored by Yiwen Zhang, Shuang Zhou, Rongbin Xu, Zhengyu Yang, Wenzhong Huang, Paulo H. N. Saldiva, Wenhua Yu, Gongbo Chen, Micheline S. Z. S. Coelho, Tingting Ye, Yanming Liu, Pei Yu, Eric Lavigne, Jiangning Song, Yuming Guo, and Shanshan Li.
URL: https://www.psypost.org/wildfire-smoke-linked-to-rising-pediatric-mental-health-emergencies/
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NYU Information for Practice puts out 400-500 good quality health-related research posts per week but its too much for many people, so that bot is limited to just subscribers. You can read it or subscribe at @PsychResearchBot
Since 1991 The National Psychologist has focused on keeping practicing psychologists current with news, information and items of interest. Check them out for more free articles, resources, and subscription information: https://www.nationalpsychologist.com
EMAIL DAILY DIGEST OF RSS FEEDS -- SUBSCRIBE: http://subscribe-article-digests.clinicians-exchange.org
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-------------------------------------------------
#psychology #counseling #socialwork #psychotherapy @psychotherapist @psychotherapists @psychology @socialpsych @socialwork @psychiatry #mentalhealth #psychiatry #healthcare #depression #psychotherapist #WildfireSmoke #PediatricMentalHealth #AirPollutionHealth #YouthMentalHealth #ParticulateMatter #EnvironmentalHealth #SchizophreniaRisk #AnxietyDepressionLinked #PublicHealthResearch #NatureMentalHealth
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Residential greenness linked to lower risk of depression and anxiety https://www.psypost.org/residential-greenness-linked-to-lower-risk-of-depression-and-anxiety/?utm_source=dlvr.it&utm_medium=mastodon #ResidentialGreenness #Depression #Anxiety #NatureMentalHealth #MentalHealth