Articles tagged with Human Brain
Researchers have determined the structure of molecules within an Alzheimer's disease brain for the first time using cryo-electron tomography and fluorescence microscopy. This study revealed the molecular structure of tau protein and its arrangement with amyloid plaques, providing new insights into the pathology of the disease.
A team of researchers has created a molecular atlas of the human brain's vasculature, revealing how endothelial cells regulate interactions between the bloodstream and surrounding tissues. The study provides insights into the growth patterns of blood vessels in early development, adulthood, and disease stages.
Scientists have discovered a new hormone, CCN3, that helps maintain bone density and strength in breastfeeding women. In mice, CCN3 increased bone mass and strength, even when estrogen levels were low. The hormone also accelerated bone healing in fracture models, offering hope for treating osteoporosis and other bone conditions.
A UCLA Health study discovered that suvorexant, an insomnia medication, blocks brain receptors for hypocretin and prevents opioid addiction in mice. The drug maintains behavioral alertness at lower doses than those inducing sleep. Further studies are needed to determine its effectiveness in humans with opioid use disorder.
A new study advances our understanding of how the brain responds to emotionally charged objects and scenes. The research identified how the brain represents different categories of emotional stimuli in a way that allows for more than a simple 'approach avoid' dichotomy when guiding behavioral responses.
A new study published in Nature Ecology and Evolution has revealed that larger animals do not have proportionally bigger brains, contradicting long-held beliefs. Humans are among the exceptions, having evolved exceptionally large brains due to rapid evolution over millions of years.
A research team at Columbia University used brain imaging to show that certain brain areas are activated when people feel curious about ambiguous visual situations. The more uncertain a person is, the more activity in these areas, which can drive exploration and creativity.
Researchers found that removing the choroid plexus leads to a reduction of newly born immature neurons and fewer repairing damage caused by a stroke. The study suggests that the choroid plexus keeps regenerative cells ready to deploy to injured areas in animal models.
A study published in Nature Mental Health found associations between prenatal cannabis exposure and potential mental health conditions in childhood and adolescence. Researchers identified potential biological mechanisms, including reductions in neuroinflammation, that could explain this association.
Researchers found that motor memories are influenced by cognitive processes, not just physical actions. The study used football penalty shootouts and robotic handle movements to demonstrate the brain's differentiation of actions based on decision uncertainty.
Researchers discovered that young adults with higher levels of inflammation were more likely to experience reduced cognitive function in midlife. Higher inflammation was associated with lower performance on skills testing and differences in executive functioning.
Researchers at the University of Alberta discovered a critical link between the heart and brain in KBG syndrome, a rare neurodevelopmental disorder. The study found that mutations in the ANKRD11 gene impact both brain development and heart defects.
A new surgical procedure reconnects muscles in the residual limb, allowing patients to receive proprioceptive feedback about their prosthetic limb's position. Seven patients who underwent this surgery were able to walk faster, avoid obstacles, and climb stairs more naturally than those with traditional amputations.
Researchers found major differences between postmortem and living prefrontal cortex brain tissues, with higher levels of RNA editing in postmortem tissues. These discoveries will shape the development of diagnostics and therapies for brain diseases, highlighting the need to study both living and postmortem samples.
Researchers found that patterns of neural activity in the hypothalamus predict performance in survival tasks, while associations with other brain regions were observed for hunting and escaping behaviors. The study provides new insights into how the human brain coordinates survival strategies.
Researchers have found that social memories lost due to sleep deprivation can be restored in mice using a drug used to treat asthma, while spatial memories can be reversed with a drug used to treat erectile dysfunction. These findings suggest potential for reversing human forgetfulness.
A CHARMed collaboration has created a set of molecular tools called CHARMs that can turn off disease-causing genes, including those coding for the prion protein. The tools have shown promise in silencing the prion protein gene and improving or eliminating disease symptoms in animals.
Scientists at Kyushu University created QDyeFinder, an AI pipeline that untangles the dense neuronal networks in the brain. The system uses a super-multicolor labeling protocol to tag neurons and then automatically identifies their structure by matching similar color combinations.
A new pilot study provides clues about the potential benefits of both intermittent fasting and standard healthy diets on brain health. Both diets showed benefits in decreasing insulin resistance, improving cognition, and reducing glucose concentration in the brain.
A study from Aarhus University and the University of Oxford reveals that listening to music sets off a complex chain reaction in the brain, involving areas for sound, emotions, and memory. This understanding could lead to new interventions for improving cognitive function in individuals with neurological conditions.
A new University of Cincinnati study reveals that a signaling pathway in the brain helps maintain health and prevent inflammation and cognitive deficits. Microglia cells produce their own TGF-β ligand to regulate local states of inflammation.
Researchers found that humans distinguish between voices based on emotional cues, with happy voices being perceived as more human-like. However, the brain's response differs, with AI voices eliciting stronger responses in error detection and attention regulation areas.
A study published in Nature Communications reveals that the hippocampus is activated differently depending on whether goals are near-term or distant, suggesting it plays a key role in prioritization. The findings have significant implications for understanding psychiatric disorders like depression.
A new model developed by Flatiron Institute researchers proposes that individual neurons exert more control over their surroundings, which could be replicated in artificial neural networks. This updated model treats neurons as tiny 'controllers' and may lead to better AI performance and efficiency.
Research on mice exposes to cannabidiol during gestation shows altered behaviors and brain changes, affecting nerve cells involved in processing emotions. The study suggests a public health priority to understand CBD's impact on developing nervous systems.
A new brain imaging study led by Weill Cornell Medicine researchers found that estrogen receptors in the brain increase with age during menopause, affecting cognitive and mood symptoms. The study pioneers PET imaging as a tool to track estrogen activity in the brain, revealing potential predictors of common menopause-related issues.
Researchers found that women who had their ovaries removed before menopause experience reduced white matter integrity in multiple brain regions. This reduction may contribute to an increased risk of cognitive decline and dementia later in life.
A new study from Columbia University Irving Medical Center suggests that the brain's mitochondria play a fundamental part in translating feelings and experiences into physical changes. Researchers found that older adults with lower psychological stress had greater mitochondrial energy transformation machinery, linked to higher well-being.
A new study uses a closed-loop auditory stimulation approach to selectively modulate brain alpha oscillations in humans. The technique has been shown to interfere with sleep onset dynamics, highlighting its potential as a tool for neuroscientific research.
This study reveals that thalamocortical connectivity plays a vital role in the formation of functional brain networks. The researchers used advanced neuroimaging techniques and computational models to map changes in thalamocortical connectivity across different age groups, from infancy to adulthood.
A new study highlights the limitations of current brain health models, which may not apply to diverse populations in Latin America. The research emphasizes the need for tailored and personalized models that consider unique factors such as genetic admixture, socioeconomic inequities, and social determinants.
Researchers found that toddlers with profound autism had larger embryonic brain cortical organoids (BCOs) compared to neurotypical controls. The BCO size was positively correlated with the child's later social symptoms, indicating that a larger brain may be the first sign of autism.
A new method in neuroimaging analysis allows researchers to predict cognition and behavioral variables using smaller datasets, contrary to the long-held belief that thousands of participants are needed. The technique involves examining MRI data to find associations with behaviors and then applying predictions to an independent sample.
A high-fat diet in adolescent rats disrupts resident gut bacteria, alters behavior, and influences brain chemicals to fuel anxiety. The study also found a link between the high-fat diet and altered expression of genes involved in serotonin production.
A recent study by Mass General Brigham researchers found that adults with a family history of Alzheimer's disease on their mother's side had higher amyloid levels in their brains. This suggests that maternal inheritance may play a role in identifying individuals at heightened risk for developing the disease.
A new study on learning has provided insights into the balance between habitual and goal-directed behaviors, with implications for AI development. The research suggests that a balance between these two types of behavior is necessary for efficient and adaptable decision-making in AI systems.
Researchers at the University of Auckland have developed a new metric to measure global cerebrovascular pulsatility transmission using 4D flow MRI technology. This innovation provides a comprehensive measure of small vessel pulsatility risk, linking it to brain conditions like Alzheimer's disease and dementia.
A study found that neural balance, measured by the E/I ratio, is associated with brain maturity and better cognitive ability. Research suggests that as children develop, their E/I ratios decrease, leading to improved performance in cognitive tests.
A recent study published in the American Psychological Association journal Emotion found that people are faster and more accurate to recognize happiness than negative emotions in face pareidolia. Women's faces tend to trigger a 'happy face advantage', while men's faces elicit an 'angry face advantage'.
A suite of three innovations by MIT researchers allows for high-resolution, high-throughput imaging of human brain tissue at various scales. This technology pipeline enables scientists to analyze the human brain at multiple scales, potentially mapping entire brains.
Two studies from University of Michigan reveal that sleep helps form and update memories, including spatial awareness. Sleep deprivation impairs memory by reducing neuron reactivation and replay, leading to long-term detrimental effects on memory consolidation.
Researchers have found that cognitive maps stored in the hippocampus and entorhinal cortex are activated when navigating through space physically or mentally. The study used animal models to demonstrate that these mental maps can be created and used during purely mental run-throughs, even without physical movement.
Research at the University of Zurich reveals that the first week after birth is a critical period for the development of senses, particularly smell and touch. Olfactory stimuli can induce neural activity across multiple brain regions, including areas responsible for non-olfactory sensory processing.
Researchers from Kyushu University discovered new conditions for a three-flash illusion, where the brain misperceives the second flash as near the midpoint between the first and third flashes. This phenomenon occurs regardless of the second flash's location, highlighting the complexity of visual perception.
Using fMRI, researchers analyzed brain activity while participants experienced sustained pain and pleasure induced by capsaicin and chocolate fluids. The study identified common brain regions activated by both experiences and developed predictive models to capture affective intensity and valence information.
Researchers created a virtual rodent with an artificial brain that can move like a real rodent, simulating complex behaviors using biomechanical data from real rats. The model uses deep reinforcement learning and AI to predict neural activity across behaviors.
Researchers from Drexel University's College of Nursing and Health Professions found that traumatic life events do impact the perception of trauma-related imagery. Viewers' personal history of adversity and trauma was associated with stronger reactions to images depicting injury/trauma.
The new technique allows for the creation of tiny replicas of the human brain so realistic that they rival fetal brain's neural network. Researchers can now study neurological disorders such as autism and schizophrenia in highly realistic brain cortical organoids.
Researchers discovered that brain's structural features are consistent with a phase transition in humans, mice and fruit flies, suggesting a universal governing principle. The findings could enable new designs for computational models of the brain's complexity.
Research finds that Huntington’s disease damages microscopic blood vessels in the brain, affecting coordination between neuronal activity and oxygenation. The study uses non-invasive measurement techniques to monitor disease progression and evaluate potential treatments.
Researchers used virtual reality to test whether humans can feel embodiment toward prosthetic
Researchers investigate Epstein-Barr Virus and Multiple Sclerosis connection, discovering cross-reactivity between viral proteins and brain proteins. The study suggests that differences in immune cell function may explain why some people develop MS after EBV infection.
Research suggests that altered lipid signaling in brain cells contributes to mental disorders, with specific inhibitors showing promise in rebalancing this mechanism. The study found similar changes in both human patients and healthy relatives, as well as mice with genetic disorders, opening up new treatment opportunities.
A Finnish study found that adolescents with higher blood pressure and arterial stiffness exhibit poorer cognitive functions, particularly attention and learning. The study also reveals interesting sex differences in the associations between blood pressure, arterial stiffness, and cognition in adolescents.
Antidepressants, such as SSRIs and SNRIs, work by restoring connections between brain regions, rather than correcting a chemical imbalance. The framework highlights the importance of these medications in alleviating depressive episodes, even if MDD isn't caused by a lack of serotonin.
A novel wearable brain scanner has given the clearest ever picture of young children's developing brains, measuring electrical brain activity with millisecond-by-millisecond precision. The study, published in eLife, opens up new possibilities for tracking developmental milestones and neurodevelopmental conditions like autism.
A recent study discovered a critical brain signal mediated by dopamine and its 'D2' receptors that plays a crucial role in timing actions. The research team used novel imaging techniques to observe this activity before self-timed presses, finding a gradual increase in brain signals about half a second prior.
A new study found that internet addiction in adolescents can lead to changes in the brain's neural networks, resulting in addictive behaviors and tendencies. The study, published in PLOS Mental Health, reviewed 12 articles involving 237 young people aged 10-19 with a formal diagnosis of internet addiction.
A team of researchers discovered a group of neurons in the brain associated with compulsive eating and food craving. The discovery found that activation of these cells triggered vigorous foraging behavior in mice, even when they were already full.
Researchers from Mass General Brigham created an algorithm to generate personalized DBS treatment plans based on four major PD symptoms. The algorithm improved patients' symptoms in four of five cases, demonstrating its potential to improve treatment beyond standard-of-care approaches.