Weekly Neuroscience Update

*Experimental tasks and behavioral results. Credit: Science Advances (2025)*

Musical people find it easier to focus their attention on the right sounds in noisy environments. This is shown in a new study from Karolinska Institutet published in the journal Science Advances. The results suggest that music training can be used to sharpen attention and cognition.

A major UK study has revealed that the early warning signs of multiple sclerosis (MS) may appear years before diagnosis and affect all communities in similar ways.

Pea-sized brains grown in a lab have, for the first time, revealed the unique way neurons might misfire due to schizophrenia and bipolar disorder, psychiatric ailments that affect millions of people worldwide but are difficult to diagnose because of the lack of understanding of their molecular basis.

Researchers have developed a minimally invasive method for recording brain activity through blood vessels.

A long-term study tracking 475 children found that autistic children are far more likely to experience persistent gastrointestinal issues than their peers. These symptoms often co-occur, persist throughout childhood, and are strongly related to challenges with sleep, communication, behavior, and sensory processing.

Science and artificial intelligence have combined in a study that could lead to personalized repetitive transcranial magnetic stimulation, or rTMS, for smokers who want to quit.

New research suggests that when people listen to speech at varying speeds, the auditory cortex does not adjust its timing but instead processes sound within a fixed time window. This discovery challenges the long-standing idea that the brain flexibly adapts its processing pace to match speech rhythms.

Neuroscientists are leveraging music’s ability to synchronize brain waves to enhance the effectiveness of transcranial magnetic stimulation (TMS).

Fluctuations in brain activity, also known as neural variability, enable us to be flexible in adjusting our behavior to the current situation. A new study shows that neural variability increases throughout development before stabilizing in adolescence. And deviating from this trajectory is associated with worse executive functioning.

Scientists have identified a previously underexplored population of hypothalamic neurons that plays a pivotal role in regulating energy expenditure.

A new study reveals that our brain’s attention system first prepares broadly, then focuses on specific details within fractions of a second. Using EEG and machine learning, researchers tracked how people focused on either the colour or the movement of dots before they appeared.

The first major data release from the HEALthy Brain and Child Development (HBCD) Study has provided researchers with a groundbreaking resource to study early childhood brain development.

A study published in The Cerebellum provides initial experimental evidence that a single session of cerebellar High-Definition Transcranial Direct Current Stimulation (HD-tDCS) may help to maintain anticipatory and consummatory pleasure and enhance reward sensitivity in healthy individuals.

New research finds that regional fat distribution exerts distinct effects on brain structure, connectivity and cognition, revealing patterns not explained by body mass index (BMI).

A new study reveals that fluoxetine, more commonly known as Prozac, does more than simply increase serotonin—it alters how brain cells utilize energy and form new connections. After two weeks of treatment, parvalbumin interneurons in the prefrontal cortex became less rigid, with mitochondrial energy genes reduced and plasticity genes upregulated.

Depression’s earliest signs can be hard to spot, but a new study shows AI can detect them in subtle facial movements.

A new five-year study explores how dopamine may drive changes in brain myelin during social isolation. Researchers will track how dopamine interacts with oligodendrocytes, the cells responsible for producing myelin and supporting neuron function.

Scientists have revealed a key mechanism in how our brains change when we learn new information or form memories.

Humans excel at adapting to new situations, while machines often stumble. A new interdisciplinary study reveals that the root of the issue lies in how humans and AI approach “generalization,” the process of transferring knowledge to new problems.

Finally this week, according to new research, habit, rather than conscious choice, drives most of our actions.

Weekly Neuroscience Update

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Researchers have found new clues in the blood that could help explain why Alzheimer’s disease develops and how it affects memory.

Scientists have discovered specialized IC-encoder neurons that make the brain “see” illusions, such as squares or triangles that aren’t truly there. These neurons receive top-down instructions from higher brain areas and then fill in missing contours in the visual cortex, actively constructing what we perceive.

A new PET tracer can provide insights into how spinal cord injuries affect not only the spinal cord, but also the brain, according to new research published in The Journal of Nuclear Medicine.

Humans excel at adapting to new situations, while machines often stumble. A new interdisciplinary study reveals that the root of the issue lies in how humans and AI approach “generalization,” the process of transferring knowledge to new problems.

An international study has revealed how the brain dynamically adjusts its communication pathways by modulating the balance between two fundamental inhibitory circuits.

A large-scale dietary trial has demonstrated that a green-Mediterranean diet can slow brain aging by modulating key blood proteins associated with neurodegeneration. Using MRI scans and proteomic profiling, researchers tracked nearly 300 participants over an 18-month period and found that diet significantly influenced the brain age gap.

A brain imaging technique has identified areas in the brain’s cerebral cortex that are most susceptible to damage from repetitive impacts, such as those incurred from heading a soccer ball.

Scientists have discovered a mechanism by which nanoplastics disrupt brain energy metabolism, providing new insights into the environmental factors that contribute to neurodegeneration. The particles disrupted mitochondrial electron transfer and reduced energy production in both general and synaptic mitochondria.

Finally, this week, depression’s earliest signs can be hard to spot, but a new study shows AI can detect them in subtle facial movements.

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A research collaboration has identified the specific nerve pathways responsible for relaying pain signals from the bowel to the brain, paving the way for new irritable bowel syndrome (IBS) and inflammatory bowel disease (IBD) treatments.

Game-based training improves not only the cognitive abilities of people with initial signs of developing dementia, but also leads to positive changes in the brain, according to two new studies.

A next-generation neuroprosthetic hand that restores a sense of touch is moving into a pivotal home-use clinical trial. The “iSens” system uses implanted electrodes to read muscle intent and stimulate nerves, relaying fingertip sensations to the brain so the prosthesis feels embodied.

A new breakthrough demonstrates how robots can now integrate both sight and touch to handle objects with greater accuracy, much like humans.

Researchers have traced a neural mechanism that explains why humans explore more aggressively when avoiding losses than when pursuing gains. Their work reveals how neuronal firing and noise in the amygdala shape exploratory decision-making.

Scientists have found a way to stop brain cancer cells spreading by essentially ‘freezing’ a key molecule in the brain.

Researchers have developed an ultrasound device that can precisely stimulate areas deep in the brain without surgery, opening up new possibilities for neurological research and the treatment of disorders such as Parkinson’s disease.

Artificial intelligence can detect and interpret social features between people from images and videos almost as reliably as humans, according to a new study published in the journal Imaging Neuroscience.

A large study of nearly 13,000 adults found that consuming high levels of certain artificial sweeteners is associated with faster declines in memory and cognitive function over an eight-year period. The effect was particularly strong in people with diabetes and those under 60. While the study does not prove causation, it raises concerns about the long-term brain health risks associated with common sugar substitutes.

Experiments have shown that AI can develop in-context learning abilities after extensive incremental practice, much like humans do.

A new study suggests that autism may be linked to the rapid evolution of brain cell types unique to humans. Researchers have found that outer-layer neurons in the human brain evolved significantly faster than in other apes, with notable changes in autism-associated genes.

A new study shows that brain iron levels, measured using a specialized MRI technique, can predict cognitive decline years before symptoms of Alzheimer’s disease appear.

People with chronic insomnia may experience faster declines in memory and thinking skills as they age—along with brain changes that can be seen on imaging scans—than people who do not have chronic insomnia, according to a study published in Neurology.

Researchers have discovered how the brain develops reliable visual processing once the eyes open.

Scientists discovered how the brain uses objects to anchor our sense of direction, solving part of the mystery of spatial navigation. Experiments in mice showed that cells in the postsubiculum fired strongly when facing an object, while cells in other directions were suppressed, sharpening orientation.

In adults aged 60 years and older, tinnitus, especially severe and prolonged tinnitus, is significantly associated with cognitive impairment, according to a study published in Brain Sciences.

A more precise and personalized form of electric brain stimulation may be a more effective and faster treatment for people with moderate to major depression compared to other similar treatments, according to a UCLA Health study.

Finally this week, researchers may have found a way to limit the debilitating damage strokes can cause.

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*The study design and data processing pipeline for SeeMe. Credit: Communications Medicine (2025).*

SeeMe, a computer vision tool, was able to detect low-amplitude, voluntary facial movements in comatose patients with acute brain injury days before clinicians could identify overt responses.

A new neuroimaging study reveals that child neglect alone, without other forms of abuse, can alter critical brain pathways. Researchers found abnormalities in white matter regions tied to movement, attention, language, and emotional regulation.

Scientists have identified a distinct neurochemical signature that distinguishes Parkinson’s disease from essential tremor.

A team of researchers has developed a simple, three-minute brainwave test called Fastball EEG that can detect early signs of memory impairment associated with Alzheimer’s disease. Unlike traditional memory tests, it is passive and requires no active participation, making it more objective and accessible.

A large-scale study with 600 participants shows that music can genuinely evoke feelings of companionship by sparking social imagination.

A toxic protein forms dynamic pores in the membranes of brain cells—and that may be the key to understanding how Parkinson’s disease develops. This is the conclusion of a new study from Aarhus University, where researchers have developed an advanced method to track molecular attacks in real time.

A hormone produced by the brain, orexin, may play a central role in the functioning of the brain’s glymphatic system, which clears waste, according to a new study.

Researchers at Johns Hopkins Medicine say they have revealed a possible molecular connection between air pollution and an increased risk of developing Lewy body dementia. The findings contribute to a growing body of evidence suggesting that environmental factors may trigger harmful protein changes in the brain, leading to neurodegeneration.

A new treatment offers hope to end the pain of neuropathy.

Two new papers from Clinical Gastroenterology and Hepatology and Gastroenterology shed light on how gut-brain interactions, influenced by both biology and life circumstances, shape eating behaviors. Together, they highlight the importance of multidisciplinary, personalized approaches to digestive health and nutrition.

Neuroscientsts have shown for the first time the precise timing of nerve signals determines how the brain processes information.

A new large-scale study shows that Alzheimer’s disease is marked by the erosion of epigenomic control, where brain cells lose the ability to maintain stable gene expression. Using a multi-region atlas of 3.5 million cells, researchers found that vulnerable cells in key memory regions such as the hippocampus suffer breakdowns in nuclear compartmentalization and lose their “epigenomic information.”

Individuals with an increased risk of dementia due to Alzheimer’s disease may have impaired spatial orientation skills.

UCLA engineers have developed a wearable, noninvasive brain-computer interface system that utilizes artificial intelligence as a co-pilot to help infer user intent and complete tasks by moving a robotic arm or a computer cursor.

Macquarie University hearing researchers have discovered how our brains learn to listen, and how this can help us understand speech in noisy, echo-filled spaces.

Some sugar substitutes may come with unexpected consequences for long-term brain health, according to a study published in Neurology. The study examined seven low- and no-calorie sweeteners and found that individuals who consumed the highest amounts experienced faster declines in cognitive function, specifically thinking and memory skills, compared to those who consumed the lowest amounts.

Finally this week, scientists studying ways of improving motion sickness have found that playing different types of music may help people recover more effectively.