Category: Alzheimers Disease

Weekly Neuroscience Update

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Illustration of the wearable rTMS device. Credit: Nature Communications (2025).

A new wearable brain stimulation device is being developed, aiming to make therapeutic brain stimulation portable and accessible. This technology could potentially allow for on-the-go treatment of various neurological and psychiatric conditions, moving brain stimulation therapy out of clinical settings and into everyday life.

A recent study provides the first detailed cellular insights into how psilocin, the active ingredient in magic mushrooms, promotes the growth and networking of human nerve cells.

Scientists have developed tiny, magnetically controlled robots designed for minimally invasive brain surgery. These robots can perform precise actions like gripping and cutting tissue, guided by external magnetic fields, potentially eliminating the need for large skull openings. The technology aims to significantly reduce patient recovery time and risks associated with traditional neurosurgery.

Marking a breakthrough in the field of brain-computer interfaces (BCIs), a team of researchers has unlocked a way to restore naturalistic speech for people with severe paralysis.

For the first time, scientists have confirmed a neurobiochemical link between dopamine and cognitive flexibility, according to new research published in The Journal of Nuclear Medicine. PET imaging shows that the brain increases dopamine production when completing cognitively demanding tasks, and that the more dopamine released, the more efficiently the tasks are completed. Armed with this information, physicians may soon be able to develop more precise treatment strategies for neurological and psychiatric disorders.

The risk of a full-blown stroke will remain high for at least a decade after a person has a slight brush with stroke, in the form of a transient ischemic attack or minor stroke, a new study says.

By analyzing DNA and proteins in the blood of people with and without acute spinal cord injuries (SCIs), researchers have developed a novel blood test that has the potential to rapidly predict the severity and likelihood of sensory and motor recovery within six months in a cost-effective manner.

A new study has demonstrated that the brains of people who experience migraines and other types of headaches cannot modulate visual stimulation in the same way a person without these conditions can.

Scientists have developed a way to map how individual connections between neurons change across the entire brain during learning, giving scientists a new view into how changes in behaviour show up in the brain. The new imaging method, DELTA, provides scientists with a brain-wide map of how individual synaptic proteins change over time. Proteins important for synaptic plasticity are known to be degraded or synthesized as synaptic connections change.

Research has found that metal particles from artificial joint implants can enter the central nervous system and accumulate in cerebrospinal fluid, raising concerns about potential neurological effects.

Though Alzheimer’s disease is often described as a buildup of proteins in the brain in the form of plaques and tangles, a new study has shown that blood vessels in the brain might hold another important clue to the disease.

Finally this week, virtual reality reveals that curiosity is key in shaping our spatial memory and mental map formation, according to new research.

Weekly Neuroscience Update

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Example atlases included in the Network Correspondence Toolbox (NCT). Credit: Nature Communications (2025)

UCLA Health researchers have helped to develop a new digital toolbox to create a “common language” for brain network studies, potentially accelerating new discoveries and treatments for neurological and psychiatric conditions.

New research published in The Journal of Neuroscience suggests that relieving psychological stress by targeting specific neurons in the brain can lower blood pressure and reduce anxiety.

People who have early signs of heart problems may also have changes in brain health that can be early signs of dementia, such as loss of brain volume, according to a meta-analysis published online in Neurology. The meta-analysis does not prove that early heart problems cause loss of brain cells; it only shows an association.

Scientists have gained greater clarity in the brain regions and neurons that control metabolism, body temperature and energy use. 

A recent study published in Science challenges assumptions about infant memory, showing that young minds do indeed form memories. The question remains, however, why these memories become difficult to retrieve later in life.

The brain’s appetite signalling pathways can be disrupted by consuming non-caloric sweeteners, according to new research.

Analysis of stroke patients from 1971 to 2019 showed college graduates exhibited stronger overall cognitive abilities immediately post-stroke. However, stroke survivors with any higher education saw a more rapid deterioration of executive functions, such as working memory and problem-solving, compared to those with lower levels of education.

New research suggests that psychopaths have a distinct pain experience, which can differ from what their bodies register.

A study published in the journal Scientific Reports suggests that virtual reality (VR) may offer a promising avenue for pain management in cancer patients. By immersing patients in realistic underwater environments using VR headsets, researchers observed a significant reduction in self-reported pain. This subjective improvement was further corroborated by real-time brain imaging, which revealed notable alterations in the neural pathways associated with pain perception.

A new review highlights how unpredictable sensory experiences, beyond traditional stressors like abuse and neglect, can disrupt brain development.

Scientists have uncovered a fundamental principle of how brain cells stay connected, and their discovery could change how we understand Alzheimer’s disease. Published in Cell Reports, this study reveals that neurons—the cells that make up our brain—use simple physics to maintain their connections, and that these processes change in Alzheimer’s patients.

New research shows that the brain’s numerical processing involves both absolute and relative quantity, with relative size processing increasing as information moves from the back to the front of the brain.

A pilot study of a post-stroke population has revealed some potential benefits of transcranial direct current stimulation (tDCS) on attention and fatigue. Study findings are published in Frontiers in Human Neuroscience.

Finally this week, marathon runners experience a temporary decline in brain myelin during races, with levels returning to normal after recovery, according to a study published in Nature Metabolism.

Weekly Neuroscience Update

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Cortical Resting-State Networks defined by Gordon’s Parcellation. Credit: Journal of the American Academy of Child & Adolescent Psychiatry (2025).

Exposure to high ambient temperatures is associated with lower connectivity in three brain networks in preadolescents, suggesting that heat may impact brain function. 

A new study reveals that consuming high-calorie, highly processed foods for just five days can reduce the brain’s sensitivity to insulin, a key factor in obesity and type 2 diabetes. Researchers found that even in healthy individuals, short-term unhealthy eating altered brain function, mimicking effects seen in people with obesity.

Scientists are exploring the role of gut-brain axis in Parkinson’s, anxiety and long COVID.

New research highlights that optimal brain health is strongly linked to cardiovascular wellness. The study underscores that dementia and cognitive decline share risk factors with heart disease, suggesting these conditions are largely preventable by managing diet, exercise, cholesterol, blood sugar, and blood pressure.

Approximately 40 percent of adults with chronic pain experience depression or anxiety, according to a review published in JAMA Network Open.

A multidisciplinary team of researchers has discovered how lateral inhibition helps our brains process visual information, and it could expand our knowledge of sensory perception, leading to applications in neuro-medicine and artificial intelligence.

Brain changes may remain visible in brain scans after recovery from concussion, a new study shows.

Researchers are using photoacoustic imaging to observe brain activity and, in the process, discovering more about how it responds to different types of learning and experiences. Photoacoustic imaging uses optics and acoustics to generate a signal in biological tissues—in this case, the brain—where the signal provides structural and functional data and allows researchers to track factors such as brain activity. 

A study exploring a new brain imaging technique is bringing stroke experts a step closer to better tailoring rehabilitation.

Scientists have uncovered new insights into how neurofilaments act like Velcro in neurodegenerative diseases, clogging up the brain and preventing normal function, according to a study published in the journal JCI Insight.

Poor sleep could have an impact on brain health, according to a new study from The Australian National University (ANU) published in the journal Sleep Medicine.

Mayo Clinic researchers have found a new way to more precisely detect and monitor brain cell activity during deep brain stimulation, a common treatment for movement disorders such as Parkinson’s disease and tremor. This precision may help doctors adjust electrode placement and stimulation in real time, providing better, more personalized care for patients receiving the surgical procedure.

A new neuroimaging study has revealed that viewing nature can help ease how people experience pain, by reducing the brain activity linked to pain perception.

An international team of scientists has revealed new clues about the neural mechanisms underlying memory formation and recognition in the developing human brain, according to a study published in Science Advances.

Poor sleep among older adults is linked to disruptions in the brain’s “waste removal system,” according to a recent study.

Research published in the Proceedings of the National Academy of Sciences  reveals that brain aging isn’t a steady decline, but rather a series of shifts with key turning points. These transition points follow an S-shaped statistical curve with clear transition points, rather than either the late-life clinical onset or gradual linear decline previously assumed, suggesting there are specific windows when intervention could be most impactful.

Finally this week, new research reveals that our brains simplify complex social interactions by using basic mental “building blocks” or shortcuts.

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Credit: Journal of Alzheimer’s Disease (2025). DOI: 10.1177/13872877251319742

Researchers have developed an AI tool that analyzes brain wave activity recorded during sleep using electroencephalography (EEG), a non-invasive technique that measures electrical activity in the brain through sensors placed on the scalp.

An encoding study reveals how the brain uses past experiences to predict the unfolding of similar events over time.

A new brain-computer interface (BCI) has enabled a paralyzed man to control a robotic arm by simply imagining movements. Unlike previous BCIs, which lasted only a few days, this AI-enhanced device worked reliably for seven months. The AI model adapts to natural shifts in brain activity, maintaining accuracy over time.

Learning to think more about specific events in the future appears to reduce impulsivity, improve decision-making, and shows potential as a therapy for alcohol use disorder, a recent study has found.

Repeated sessions of electrical stimulation to brain networks associated with memory improved verbal learning in some Alzheimer’s disease patients for up to eight weeks in a preliminary trial led by UT Southwestern Medical Center researchers. The findings, published in The Journal of Prevention of Alzheimer’s Disease, indicate that while future trials are needed, neurostimulation shows early promise as a treatment for Alzheimer’s and other neurodegenerative disorders, such as Lewy body dementia.

Alcohol use leads to earlier brain aging and impaired behavioral flexibility, with those effects detectable even among adults in their 20s and 30s, according to an innovative study.

Researchers at Karolinska Institutet have identified a new mechanism that may improve the treatment of ischemic stroke. The study, published in the Journal of Clinical Investigation, shows that the growth factor PDGF-CC and its receptor PDGFRα play a crucial role in scar formation in the brain after an ischemic stroke.

An abnormal form of the tau protein found to accumulate in the brains of Alzheimer’s disease patients also accumulates in the eyes of patients with the condition, according to a recent study.

Scientists have observed for the first time how neurons in the human brain store memories independent of the context in which they are acquired. Published in Cell Reports, the study confirms that neurons can distinguish objects or people regardless of their context, enabling the formation of higher and more abstract relationships, which constitute the basis of human intelligence.

Higher fish consumption is associated with slower disability progression in multiple sclerosis (MS), according to research published in the Journal of Neurology, Neurosurgery & Psychiatry.

Using sophisticated neuroimaging techniques, researchers have mapped the brain’s activity during natural conversations, revealing how we seamlessly process speech and sound. These insights not only deepen our understanding of human connection but also pave the way for transformative advancements in speech technology and communication tools.

Finally this week, a recent study in Computers in Human Behavior, researchers observed that staying away from smartphones can even change one’s brain chemistry.

Weekly Neuroscience Update

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Functional connectivity with the rFP (green, left) defines a distributed brain circuit (right) that will encompass coordinates activated by creativity tasks. Credit: Brigham and Women’s Hospital

A new study suggests that different brain regions activated by creative tasks are part of one common brain circuit. By evaluating data from 857 participants across 36 fMRI studies, researchers identified a brain circuit for creativity and found people with brain injuries or neurodegenerative diseases that affect this circuit may have increased creativity.

New research has uncovered why males and females may experience stress differently, providing insights into how the brain’s molecular mechanisms adapt to acute challenges.

How can nerve pathways in the brain be visualized to improve the planning of complex surgeries? A research team has investigated an AI-powered method that makes these reconstructions more precise. The study, recently published in NeuroImage: Clinical, could ultimately help make neurosurgical procedures safer.

Three studies at the University of Zurich demonstrate that hypnosis alters activity in the large-scale functional networks of the brain. It also affects the neurochemical milieu of specific brain areas.

New research reveals that brain cells use a muscle-like signaling mechanism to relay information over long distances. Scientists discovered that dendrites, the branch-like extensions of neurons, contain a structured network of contact sites that amplify calcium signals—similar to how muscles contract. These contact sites regulate calcium release, activating key proteins involved in learning and memory.

Researchers have made a major breakthrough in understanding the link between genetics and cognition.

A recent large-scale study published in Science Advances has revealed a connection between genetic variations associated with dyslexia and structural differences in the brain. These differences were found in areas involved in motor coordination, vision, and language. This provides new insights into the neurological underpinnings of this common learning difficulty.

According to a recent study, a diet low in vegetables and fruits and high in red meat, fast food, and sugar-sweetened soft drinks was associated with accelerated biological aging.

A new mathematical model sheds light on how the brain processes different cues, such as sights and sounds, during decision making. The findings may one day improve how brain circuits go awry in neurological disorders, such as Alzheimer’s, and could help artificial brains, like Alexa or self-driving car technology, more helpful.

New research has shown just one 20-minute session of moderate intensity aerobic exercise can improve an athlete’s executive function and concussion symptoms in the early stages of recovery.

A recent study using brain imaging technology discovered that experiencing beauty in music involves increased communication between brain areas associated with reward and visual processing, while listening to music considered less beautiful is linked to more activity in brain regions responsible for basic sensory processing. 

Finally this week, women with epilepsy may have offspring with decreased bone metabolism and lower birth weight, according to a study published in the Annals of Clinical and Translational Neurology.

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Scientists have highlighted the most effective treatments for neurological diseases by overcoming one of medicine’s most difficult challenges: the blood–brain barrier. The findings offer new hope for patients with conditions including Alzheimer’s, and Parkinson’s disease, brain tumors, and epilepsy.

A study conducted in Finland showed that changes in the functioning of opioid neurotransmitters in the brain may underlie anorexia.

Poorer cardiovascular health in childhood and adolescence may be linked to early differences in brain structure, particularly in areas of the brain known to be affected in dementia in later life, according to a new scientific study.

Researchers have uncovered how specific patterns in brain activity can predict an individual’s sensitivity to pain, expanding opportunities for improved pain management strategies.

Delayed rapid eye movement (REM) sleep may be an early indicator of Alzheimer’s disease. Researchers found that participants with delayed REM sleep had higher levels of toxic proteins associated with Alzheimer’s and reduced levels of brain-derived neurotrophic factor (BDNF), which supports memory.

The microbial ecosystems in our mouths may impact cognitive function as we age, with pathogenic bacteria linked to cognitive decline.

New research suggests that mood swings in bipolar disorder are regulated by two clocks: the body’s 24-hour circadian rhythm and a dopamine-based clock that influences alertness. When these clocks align at specific intervals, they may trigger shifts between mania and depression.

A study in the Journal of Neuroscience reveals a new mechanism for how brain cells transmit signals from their tips to their nucleus, triggering gene activation crucial for learning and memory.

Investigators have discovered that activity in two widely distributed brain networks previously considered separate are actually correlated with each other and together play a key role in recognition memory, according to a study published in Cell Reports.

Cannabinoids offer new hope for safe and effective pain relief.

Researchers analyzed the genetic connection of retinal cells and several neuropsychiatric disorders. By combining different datasets, they found that schizophrenia risk genes were associated with specific neurons in the retina. The involved risk genes suggest an impairment of synapse biology, so the ability of neurons to communicate with each other. This impairment might also be present in the brains of schizophrenia patients.

Researchers at the University of Barcelona have identified a deficit in contrast perception in people with schizophrenia.

A study of nearly 1,000 people with post-COVID-19 syndrome (PCS) revealed that two-thirds still experienced significant symptoms, including reduced exercise capacity and cognitive performance, two years after infection. Persistent symptom clusters included fatigue, neurocognitive disturbances, and post-exertional malaise, with worse outcomes in individuals with obesity, lower education, or severe initial infections.

Finally this week, new research shows diets high in processed meat, fast food, and sugary drinks accelerate biological aging, even in young adults.

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Cortical gray matter volume trajectories based on the functional location of the changes in gestational mothers (N = 179). Credit: Nature Communications (2025).

A new study has analyzed the brains of women during pregnancy for the first time using neuroimaging techniques. The research shows that there is a reduction and partial recovery of almost 5% of gray matter in 94% of the total gray matter volume of the brain, especially in regions linked to social cognition.

An international team has shown the relationship of activity of neurotransmitters to how humans process the emotional content of language.

More than half of 23-year-olds in a European study show restrictive, emotional or uncontrolled eating behaviours, according to new research led by the Institute of Psychiatry, Psychology & Neuroscience (IoPPN) at King’s College London. Structural brain differences appear to play a role in the development of these eating habits.

A new framework links brainwaves to individual cognitive states.

In a recent study, scientists have shown neurotransmitters in the human brain are active during the processing of the emotional content of language, providing new understanding into how people interpret the significance of words.

A new study shows stem cell therapy ‘jump-start’ brain repair after stroke.

Researchers have developed a flexible, biodegradable electrode capable of stimulating neural precursor cells in the brain, offering a safer and more precise alternative for neural repair. The electrode dissolves naturally after seven days, eliminating the need for surgical removal while promoting tissue regeneration.

Music supports babies in neonatal intensive care units, according to a recent neuroimaging study.

A study analyzing data from over 130 million individuals found that antibiotics, antivirals, vaccines, and anti-inflammatory medications are associated with a reduced risk of dementia. This supports the idea that infections and inflammation contribute to dementia and highlights the potential of repurposing existing drugs for prevention or treatment.

New research has uncovered psychological profiles associated with mental and brain health in middle-aged and older adults.

An experimental treatment for depression that triggers seizures with magnets significantly improved mental health in patients without some cognitive effects associated with electroconvulsive therapy (ECT), according to a clinical trial led by UT Southwestern Medical Center.

A research team has gathered new insight into the neural underpinnings of human cooperation.

A new study has identified three psychological profiles that influence brain health, cognitive decline, and dementia risk in aging adults. Profiles with high protective traits, like purpose and openness, show better cognition and brain integrity, while those with low protective traits or high negative traits face accelerated brain atrophy and mental health issues.

Stanford Medicine scientists are generating a periodic table of sorts for psychiatric disorders, providing a better understanding of these conditions and paving the way toward targeted treatment.

A study analyzing data from over 2 million veterans found that GLP-1 receptor agonists, popular weight-loss drugs like Ozempic and Wegovy, provide significant neurological and behavioral health benefits, including reduced risks of addiction, Alzheimer’s, and dementia. However, they also pose risks for pancreatitis and kidney conditions.

Finally, this week, a brain signal that lights up when we anticipate rewards may hold the secret to helping people overcome depression, and researchers are working to unlock its potential.

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A new study has shown neurotransmitters in the human brain are released during the processing of the emotional content of language, providing new insights into how people interpret the significance of words.

Researchers have identified how cerebrovascular disease disrupts brain connectivity, contributing to cognitive decline and neurodegeneration alongside Alzheimer’s disease. 

There may be a link between hearing impairment and an increased risk of developing Parkinson’s according to research led by Lancaster University.  Researchers analyzed data from over 159,000 individuals, finding that every 10-decibel increase in hearing loss corresponded to a 57% higher risk of Parkinson’s. While the findings highlight a strong association, the causality between hearing loss and Parkinson’s remains unclear.

A new systematic literature search has identified the highest priority clinical actions aimed at improving post-acute care for non-hospitalized traumatic brain injury.

Researchers are making strides in restoring touch sensations to prosthetic limbs through brain stimulation. By using electrodes in the brain’s touch center, they can evoke stable, precise sensations, even allowing users to feel the shape and motion of objects.

Increasing physical fitness levels has a causal link with better language comprehension, according to the first study to show this effect.

New research reveals that certain cells inactivate one parent’s copy of a gene, leading to a bias in gene activity that may explain why some individuals with disease-causing mutations remain symptom-free. This selective gene inactivation, known as monoallelic expression, affects about 1 in 20 genes and varies between cell types.

A new study from Karolinska Institutet and Mayo Clinic has revealed important insights into brain degeneration in dementia with Lewy bodies.

Tourette syndrome is currently diagnosed about three times more frequently in males than in females. A new study finds that females are less likely to be diagnosed with the syndrome, take longer to receive a diagnosis and are older when they are diagnosed than male individuals.

Finally this week, a new study has found that eating greater quantities of red meat, especially in processed forms, increases the risk for dementia.

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Regional Cortical Volume and Thickness Associations With Early Substance Use Initiation in the Adolescent Brain Cognitive Development (ABCD) Study. Credit: JAMA Network Open (2024). 

A new study has identified neuroanatomical differences in children associated with early substance use initiation.

Vagus nerve stimulation (VNS) shows a positive treatment effect and improved quality of life (QoL) among patients with treatment-resistant depression according to two studies published in Brain Stimulation.

A new analysis of U.S. mortality data reveals the disproportionate impact of traumatic brain injuries on older adults, males and certain racial and ethnic groups.

Gender differences define how the human brain ages and telltale biomarkers in the blood may be strongly suggestive of cognitive impairment and dementia, according to a comprehensive new study involving more than 500 people.

Researchers have identified genetic variations in brain cells, particularly microglia and oligodendrocytes, that influence both aging and Alzheimer’s risk.

New research shows that not all brain cells age equally, with certain cells, such as those in the hypothalamus, experiencing more age-related genetic changes. These changes include reduced activity in neuronal circuitry genes and increased activity in immunity-related genes.

A recent study has found that menopause revs up the progression of multiple sclerosis (MS).

Researchers have discovered that pupil size during non-REM sleep correlates with memory consolidation. When pupils contract, the brain focuses on consolidating new memories; when dilated, it processes older ones. This separation prevents “catastrophic forgetting,” allowing the brain to efficiently manage both new and existing knowledge. These findings could lead to better memory enhancement techniques for humans and inspire more efficient artificial neural networks.

A new study shows head trauma may activate latent viruses, leading to neurodegeneration.

A collaborative effort between Mount Sinai and Memorial Sloan Kettering Cancer Center has shed valuable light on how monoamine neurotransmitters such as serotonin, dopamine, and now histamine help regulate brain physiology and behavior through chemical bonding of these monoamines to histone proteins, the core DNA-packaging proteins of our cells.

Finally this week, sex differences in brain structure are present from birth, new research shows.

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EEG setup with e-tattoo electrodes. Credit: Nanshu Lu

For the first time, scientists have invented a liquid ink that doctors can print onto a patient’s scalp to measure brain activity. The technology offers a promising alternative to the cumbersome process currently used for monitoring brainwaves and diagnosing neurological conditions. It also has the potential to enhance non-invasive brain-computer interface applications.

People who have chronic traumatic encephalopathy (CTE) who have a family history of mental illness may have a higher risk of aggression in middle age, according to a new study.

A loss of brain volume associated with new immunotherapies for Alzheimer’s disease may be caused by the removal of amyloid plaques, rather than the loss of neurons or brain tissue, finds a study led by UCL researchers.

A common heart drug may slow the progression of Huntington’s disease according to new research.

Men with cardiovascular disease risk factors, including obesity, face brain health decline a decade earlier—from their mid 50s to mid 70s—than similarly affected women who are most susceptible from their mid 60s to mid 70s, suggest the findings of a long term study, published online in the Journal of Neurology Neurosurgery & Psychiatry.

In a new study published in Briefings in Bioinformatics, researchers have found that depression can increase the chances of a person experiencing menstrual pain (dysmenorrhea).

Researchers have achieved a major milestone in the treatment of spinal cord injuries (SCI). By applying deep brain stimulation (DBS) to an unexpected region in the brain—the lateral hypothalamus (LH)—the team has improved the recovery of lower limb movements in two individuals with partial SCI, greatly improving their autonomy and well-being.

Soccer heading may cause more damage to the brain than previously thought, according to a study presented at the annual meeting of the Radiological Society of North America (RSNA).

New research reveals subtle changes in the visual pathways of individuals with chronic mild traumatic brain injury (TBI), even when standard eye examinations show no abnormalities. These findings include structural and functional deficits despite participants showing normal visual acuity during clinical examination.

A recent study identifies research strategies for tying brain function and structure to behaviour and health.

COVID-19 may be a risk factor for multiple sclerosis (MS). This has been shown by new research at Örebro University and Örebro University Hospital, Sweden. The study is published in the journal Brain Communications.

A study appearing in Nature Neuroscience has linked distinct neural and behavioral characteristics in autism spectrum disorder (ASD) to a simple computational principle.

Everyday physical activity, like going for a short walk or playing with the kids, may provide short-term benefits for cognitive health, equivalent to reversing four years of cognitive aging. That was a key finding a new study, published in the journal Annals of Behavioral Medicine.

Voice experiments in people with epilepsy have helped trace the circuit of electrical signals in the brain that allow its hearing center to sort out background sounds from their own voices.

A study led by University College London researchers found that large language models, a type of AI that analyzes text, can predict the results of proposed neuroscience studies more accurately than human experts.

Skeletal muscle loss is a risk factor for developing dementia, according to a study presented at the annual meeting of the Radiological Society of North America (RSNA).

A pioneering study has meticulously mapped the brain’s intricate neural pathways, shedding light on how specific regions work together to control impulsive actions. By employing advanced neuroimaging and noninvasive brain stimulation techniques, researchers uncover the mechanisms that allow us to halt unwanted actions.

Finally this week, new research reveals the unique human ability to conceptualize numbers may be rooted deep within the brain.