Articles tagged with Neurophysiology
Researchers at Karolinska Institutet and Columbia University identified a mini-brain within the heart with its own nervous system that controls the heartbeat. This discovery challenges current views on how the heartbeat is controlled and may lead to new insights into heart diseases and treatments.
During winter hibernation, thirteen-lined ground squirrels reduce the activity of neurons in circumventricular organs, suppressing their sensitivity to physiological cues for thirst. This adaptation enables them to survive for months without drinking, despite their bodies crying out for water.
A team of scientists has pinpointed a critical neural circuit for female sexual rejection, revealing how the brain integrates signals to shape behavior. The ventromedial hypothalamus, specifically progesterone-sensitive neurons in the anterior VMH, play a crucial role in determining whether a female accepts or rejects mating attempts.
A new study directly measures the hearing range of minke whales, revealing they can detect high-frequency sounds as high as 90 kHz. This discovery suggests baleen whales may be more impacted by ocean noise than previously thought and highlights the need for clearer thresholds to measure their sensitivity.
Fiber-rich food manufacturers can now create palatable products by encapsulating insoluble fibers in a soft, velvety gel coating. The treatment reduces the sensation of grittiness and dryness in the mouth by up to 52% and 36%, respectively.
A new study has identified 16 distinct types of nerve cells in humans, challenging the long-held assumption that each type of sensation is linked to a specific nerve cell. The research reveals complex interactions between these nerve cells and their functions.
A longitudinal study tracked one person's brain activity for five months, revealing how daily life affects brain function. The research found that physical activity positively influences brain regions, while subtle shifts in mood and heart rate leave lasting imprints for up to fifteen days.
A new AI algorithm, DPAD, developed by Maryam Shanechi's lab, can dissociate brain patterns related to specific behaviors, improving brain-computer interfaces for paralyzed patients. The algorithm can also discover new patterns in the brain that may be missed by prior methods.
Researchers identified key brain areas, including aVTC and OFC, essential for visual object memory in macaques. Single-neuron recordings revealed top-down regulation and causal information flow between these regions, shedding light on short-term visual object memory mechanisms.
Researchers have discovered a new type of brain cell in the medial entorhinal cortex that accurately predicts future locations as an animal travels. This discovery helps explain how planned spatial navigation is possible and has important implications for understanding mechanisms of spatial navigation and episodic memory formation.
Researchers discovered a new type of brain activity called BARRs, which helps maintain balance in hippocampal neural networks during sleep. Disrupting these barrages can lead to impaired memory performance.
Researchers found that epigenetic state affects neurons' recruitment into memory trace formation. Open chromatin states enable more efficient learning. The study opens new avenues for understanding learning and may lead to medication for improving cognitive disorders.
Scientists at Washington University in St. Louis have found that altering GABA receptor density affects circadian rhythm amplitude and synchrony among SCN cells. Reducing or mutating these receptors decreased the mice's daytime wheel-running and reduced nocturnal activity.
A mouse study identifies a novel non-synaptic signaling mechanism between the brain and peripheral sensory system in migraine. The study suggests that CSF influx activates neurons, triggering aural migraine headaches and providing potential pharmacological targets for treating the disorder.
GLP-1 receptor agonists promote preingestive satiation via neurons in the dorsomedial hypothalamus, increasing feelings of fullness and reducing food intake in both mice and humans. This study provides new insights into the neural pathways underlying GLP-1RAs' effects on obesity.
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.
Research by Stanford Medicine scientists reveals that adaptive myelination in the brain can contribute to drug addiction, with a single dose of morphine triggering maladaptive myelination and reinforcing drug-seeking behavior.
FutureNeuro, a leading SFI Research Centre, is expanding its research programme with a focus on diagnostics, therapeutics, and digital health. The centre aims to develop precision diagnostics, future treatments, and systems using real-time health data.
A new study reveals that neural activity related to sound detection and movement are temporally separated but share commonalities, with neurons adapting their activity based on experience. The findings shed light on the brain's complex processing of sensory information and behavioral choices.
A new study published in Nature found that sleep weakens new brain connections forged during wakefulness only during the first half of a night's sleep. The researchers suggest that this 'reset' prepares the brain for learning and new connections the next day.
Researchers used a new brain mapping tool called BARseq to classify and map millions of neurons across nine mouse brains. They discovered that sensory inputs influence the cellular signatures of each brain region, leading to distinct 'signatures' akin to cellular ID cards.
Researchers found that watching sports fosters a sense of community and belonging, while triggering activation in the brain's reward circuits. Regular sports viewing may also induce changes in brain structures, leading to long-term benefits for individuals.
Researchers at RIKEN Center for Brain Science discovered neural circuitry in the spinal cord that enables brain-independent motor learning and recall. The study found two critical groups of neurons: one necessary for new adaptive learning and another for recalling adaptations once learned.
Researchers discovered a class of cerebellar inputs, called climbing fibres, are essential for associative learning to occur. These
Researchers used bioluminescent oxygen indicator to track pO2 changes in mouse cortical astrocytes, finding transient hypoxic pockets that lasted several seconds to minutes and decreased with exercise. The findings suggest physical inactivity may directly affect tissue pO2 by favoring capillary occlusions.
Researchers have solved the long-standing question of what triggers the alarm response in fish by identifying two distinct chemical signals: Daniol sulphate and Ostariopterin. These substances convey separate pieces of information that must be detected simultaneously to trigger a flight-or-freeze response.
The ICNIRP panel states that research on SWL exposure is inconsistent, with some studies indicating possible effects on alertness or sleep and others not supporting such effects. The panel also notes that potential long-term adverse effects of SWL exposure are unclear, particularly regarding its impact on chronic diseases and conditions.
Scientists have identified a crucial role of the newly discovered ion channel Elkin1 in converting mechanical stimuli into electrical signals, enabling normal touch sensation. The findings also suggest Elkin1 may play a part in transmitting painful mechanical stimuli, opening up new potential targets for chronic pain treatment.
Researchers developed a new machine learning method to analyze brain data, separating intrinsic neural patterns from sensory inputs. The method revealed surprisingly consistent hidden patterns in three subjects' neural activity despite different tasks.
Research reveals oxytocin neurons in mouse brain modulate object recognition memory, with activation boosting long-term memory and implicating Alzheimer's disease. Oxytocin's role in social memory also highlighted, suggesting a potential link to loneliness or limited social engagement.
The study reveals that the superior colliculus is vital in the transition from seeing individual flashes to smooth motion, and may be a key component in creating the continuity illusion. Different methods of measuring the Flicker Fusion Frequency threshold suggest other parts of the brain also play a role in this process.
A study by Fujita Health University researchers unveiled novel insights into the brain's processing of movement and sensation. The findings suggest that signals from motor cortices do not primarily modulate sensory responses in primary sensory cortices, but rather pathways from secondary somatosensory cortex (S2) and sensory thalamus (...
A new study found that changes in brain function, specifically the auditory sensory memory system, may be a potential biomarker for Batten disease. Researchers measured brain activity using electroencephalography (EEG) and found a decline in response as the disease progressed.
A study on chinstrap penguins found that they accumulate over 11 hours of sleep per day through thousands of 4-second microsleeps. This breaks traditional notions of prolonged sleep bouts and suggests an incremental approach to sleep accumulation.
A team of neuroscientists and physicists at Princeton University studied the brain of Caenorhabditis elegans to understand how information flows through a network of interacting neurons. They used optogenetics to activate individual neurons and observe how other neurons responded, shedding light on the complex neural connections.
Researchers have discovered that traumatic memories create new neural networks and associations between distinct networks, enabling fear-based learning and recall. The study used optical and machine-learning approaches to visualize the dynamics of brain activity during memory formation.
Researchers found that participants preferred 60-70 options from ChatGPT, citing high perceived accuracy and increased intent to purchase. This contradicts traditional choice overload theories, highlighting the impact of personalized recommendations on consumer decision-making.
Caribbean box jellyfish have demonstrated complex learning capabilities, including associative learning and memory formation, despite having only one thousand nerve cells. This discovery sheds new light on the evolutionary success of jellyfish and raises questions about the universality of advanced learning mechanisms in animals.
Researchers at Stanford Medicine have developed a brain-computer interface that can decode the intended words of a speech-disabled person and display them on a computer screen. The technology has shown promise in restoring communication for individuals with amyotrophic lateral sclerosis (ALS) who are unable to speak.
A study in mice found that white matter, a type of nervous system tissue, shows the most pronounced changes as the animals age. The researchers identified 82 genes frequently expressed in different brain regions and developed an aging score to assess gene activity changes with age.
Researchers used a mathematical theory called the free energy principle to predict how real neural networks learn and organize themselves. The study successfully mimicked this process in rat embryo neurons grown in a culture dish, demonstrating the principle's guiding force behind biological neural network learning.
A team of scientists has successfully elucidated the structure and function of LITE-1, a biomolecule used by Caenorhabditis elegans to detect danger. The researchers used artificial intelligence to predict the structure of LITE-1, which is a channel protein that forms a pore in the cell membrane allowing charged particles to pass through.
A Lehigh University professor has received $4 million in NIH grants to develop an AI-driven approach for precision mental health diagnosis and care. The project aims to identify biomarkers in the brain that can predict treatment response and personalize interventions for patients with depression and other mental disorders.
A study by Pierre Hakizimana at Linköping University found that the DC signal in the cochlea can provide an indication of ear health status, allowing the brain to decode faint sounds. The discovery may contribute to new research on diagnosing noise-induced hearing loss and has implications for preventing permanent damage from loud sounds.
A study by researchers from the University of Tsukuba found a key molecule involved in sleep homeostasis also plays a critical role in circadian behavior. The SIK3-HDAC4 pathway modulates the length of the circadian period through NMS-producing neurons, contributing to the sleep/wake rhythm.
Researchers from Children's Hospital of Philadelphia found that repeated soccer headers equivalent to a throw-in did not cause immediate neurophysiological deficits for teens. However, oblique headers resulted in higher levels of angular head motion, suggesting proper training is necessary to reduce the risk of injury.
Researchers found elephant seals use short sleep cycles at depths below predators to enter full REM sleep with lower risk. These 'sleeping dives' are crucial for the species' survival in open ocean environments.
A new case series study found that an 8-week methylation-supportive diet and lifestyle program reduced biological age by 4.60 years, with five of six participants exhibiting significant age reversal. The study suggests that this intervention may favorably influence biological age in both sexes.
Researchers have discovered volatile compounds in tsetse flies that control mating behavior and potentially aid disease management. The findings may lead to the development of new tools to combat trypanosomiasis, a life-threatening illness transmitted by these insects.
Researchers have identified a full pathway from skin neurons to brain pleasure centers, revealing the neurobiological basis of pleasurable social touch. The study suggests that touch-based therapies may alleviate anxiety, stress, and depression, with potential applications for autism and other conditions.
A new study by Italian neuroscientists found that blind and deaf individuals' brains possess an innate functional architecture for integrating sensory information. This suggests that brain architecture can develop independently from sensory experience, adding weight to the 'nature versus nurture' debate.
A Collaborative Research Centre investigates animal navigation using the Earth's magnetic field. The study focuses on vertebrates, including birds and fish, aiming to protect endangered migratory species.
The Wyss Center's ABILITY system, a fully implantable brain-computer interface, records neural activity in sheep with high accuracy, decoding fine movement intention from small brain areas. The device is designed to improve quality of life and independence for people with severe paralysis.
Research at Northwestern University finds that eating during the daytime is ideal for dissipating energy as heat, while nighttime eating disrupts this process. This study's findings have broad implications for dieting, sleep loss, and patient nutrition, particularly in cases of Type II Diabetes.
Researchers introduced DIANA, a noninvasive neuroimaging method for direct imaging of neuronal activity in living mice. This approach overcomes the limitations of BOLD-fMRI by providing millisecond precision and detection of rapid sequential propagation of neuronal activity across neural pathways.
A novel fluorescent sensor has been developed to visualize the release of oxytocin, also known as the 'happy hormone', in living animals. The sensor, called MTRIA OT, allows for real-time measurement of extracellular oxytocin dynamics in the brain, revealing variability in OT levels dependent on behavioral and physical conditions.
A recent study published in Nature Neuroscience found that a 20-minute non-invasive treatment regimen can improve both short-term and long-term memory in individuals 65 years and older. The treatment involves electrical brain stimulation delivered through scalp electrodes, and its effects were observed to last at least one month.
A pilot study from UCLA researchers found that neurofeedback training significantly normalized brain wave frequencies and improved cognitive function in cancer patients with chemo brain. The study's results support further research into the effectiveness of neurofeedback as a treatment approach.
Rapid eye movements during REM sleep encode direction and amplitude of a mouse's dream environment, providing an external readout of internal cognitive processes. This finding reveals a coordination that may underlie the realistic experience of dreams.
Research suggests rising temperatures could disrupt sleep patterns and blunt the immune response, making people more susceptible to infections. This is particularly concerning for low-income communities and communities of color who face heightened risks from heat and limited access to air conditioning.