Articles tagged with Hippocampal Neurons
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Researchers at University College London discovered that Alzheimer's disease disrupts the brain's 'memory replay' process, leading to impaired navigation and memory loss. The study found that even when mice were resting, their brains replayed recent experiences in an altered pattern, which had consequences on memory tasks.
Researchers at USC have identified four distinct layers of specialized cell types in the CA1 region of the mouse hippocampus, a structure vital for memory formation. This discovery changes our understanding of how information is processed in the brain and could explain why certain cells are more vulnerable in diseases like Alzheimer's ...
A recent study published in The EMBO Journal reveals that the Setd8 gene plays a critical role in the premature aging of the brain by controlling neural stem cell activity and proliferation. Artificially lowering Setd8 levels mimicked molecular signatures of aging, highlighting its potential as a biomarker for early aging.
Researchers found that inhibitory neurons called parvalbumin interneurons reduce activity before a learned reward zone is reached, clearing the way for excitatory neurons to strengthen their bonds and reinforce learning. This finding challenges traditional ideas about neural activity and learning.
The study reveals that deep and superficial pyramidal neurons work complementarily in mice to generate spatial maps, opening new avenues for understanding brain navigation and memory. The findings have implications for treating neurological disorders such as Alzheimer's disease.
Researchers at MIT's Picower Institute have discovered a new approach to treating fragile X syndrome by enhancing the activity of a specific component of 'NMDA' receptors. This strategy normalizes protein synthesis, neural activity and seizure susceptibility in hippocampus of fragile X lab mice, offering a promising therapeutic target.
Researchers at University of British Columbia discovered a new brain cell type called 'ovoid cells' that play a central role in remembering and recognizing objects. These highly-specialized neurons activate when encountering something new, triggering the process to store objects in memory.
Research identifies IL-1R1-expressing neurons in key brain regions, including the somatosensory cortex and hippocampus, which regulate sensory processing, mood regulation, and memory. The study provides new insights into how inflammation contributes to sensory, mood, and memory disorders.
Researchers at UCSF found a brain signature of resilience in mice that suggests a new way to treat severe depression. Stress changes activity in the amygdala, distinguishing resilient from less resilient mice. By stimulating neurons, the team improved decision-making and reduced ruminating in less resilient mice.
Researchers studied mossy fiber synapses in the hippocampus, a crucial region for memory formation and spatial navigation. They discovered that specific proteins play key roles in encoding and processing distinguishing features to trigger memory retrieval.
Researchers discovered that NMDA receptors set the baseline level for neural network activity, helping maintain stable brain function. The study's findings suggest potential innovative treatments for diseases linked to disrupted neural stability.
A new study in mice shows a unique mRNA delivery method can successfully edit faulty genes in fetal brain cells. The technology has the potential to stop progression of genetic-based neurodevelopmental conditions like Angelman syndrome and Rett syndrome before birth.
Researchers have developed a computer simulation of brain neuron growth, using Approximate Bayesian Computation. The model successfully mimicked the growth patterns of real hippocampal neurons, showing promise for understanding neurodegenerative diseases and potential treatments.
Researchers from Johns Hopkins Medicine discovered how a brain cell surface molecule shapes neuron behavior, finding that it suppresses selectivity in neurons. The study's findings may help scientists better understand causes of autism, schizophrenia, and epilepsy.
A landmark study found specific types of brain cells fired in a way that mirrored the order and structure of a person's experience. The brain retains these unique firing patterns after the experience is concluded and can rapidly replay them while at rest.
A study published in Neuron found that psychedelics, such as DOI, activate fast-spiking interneurons in the ventral hippocampus, which helps to silence other neighboring neurons and reduce anxiety in mice and rats. This understanding of brain chemistry could lead to the development of new drugs targeting anxiety.
The brain stores multiple copies of a single memory in parallel among different groups of neurons emerging at different stages during embryonic development. These memory copies change with time, with early-born neurons storing long-term persistence and late-born neurons fading over time.
Nerve cells in the hippocampus region of the bat brain encode information on multiple characteristics of other individuals, including sex and dominance hierarchy. This study sheds light on how the brain operates and generates thinking processes and behavior.
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 at the University of Rochester Medical Center found that ketones can rescue impaired neuronal function in the hippocampal network. This study suggests a potential therapeutic approach for preventing or delaying neurodegenerative diseases like Alzheimer's.
A team of researchers from Rice University and the University of Michigan found that some neurons not only replay recent past experiences but also anticipate future experience during sleep. The discovery provides an unprecedented view of how individual neurons in the hippocampus stabilize and tune spatial representations during periods...
Salk scientists develop new method to quantify synaptic features, revealing high precision of plasticity and up to 10 times more storage capacity. The technique uses information theory to analyze synapse pairs from a rat hippocampus, offering a scalable approach for studying brain function.
Researchers discovered a group of neurons that help coordinate brain focus and storage functions for short-term information retention. These 'category' and 'phase-amplitude coupling' (PAC) neurons work together to enhance recall, offering new insights into Alzheimer's and ADHD treatments.
Researchers at University of Cologne's CECAD Cluster of Excellence discovered that mitochondrial fusion boosts new neuron plasticity. The study found that as new neurons mature, their mitochondria fuse to acquire elongated shapes, sustaining synaptic plasticity and refining brain circuits.
A study published in Brain, Behavior, and Immunity found that normal levels of interferon-β are required for normal memory function, and its absence changes nerve cell components in a sex-dependent fashion. The research also showed that higher or lower than normal levels of interferon-β affect the brain in a sex-dependent manner.
Scientists at Albert Einstein College of Medicine discovered that inflammation in certain neurons is necessary for forming long-lasting memories. The researchers found that DNA damage and repair within these neurons leads to stable memory assemblies, which are clusters of brain cells representing past experiences.
Dr. Ryyna Ethell's lab at UC Riverside has been awarded a $2.4 million NIH grant to investigate the role of astrocytes in inhibitory synapse development and their connection to neurodevelopmental disorders like ADHD and autism.
Researchers discovered that ketamine's sustained effects involve increasing immature cells' activity, while rapid effects rely on newborn neurons firing more rapidly. This breakthrough opens doors to developing new antidepressant treatments.
Scientists have gained new insights into spatial memory by discovering that different types of nerve cells become active together and are coordinated by brain waves. This discovery sheds light on the neural basis of human memory and may lead to the development of new therapies for memory impairments.
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.
A study published in Science reveals the spatial connectivity patterns of mouse hippocampal neurons at a single-neuron level. The researchers reconstructed the whole-brain axonal morphology of over 10,000 neurons, identifying 43 distinct projectome cell types and new projection patterns.
A new study using generative AI models simulated how the brain learns and remembers events, revealing how memories are re-constructed in our minds. The model showed how the hippocampus and neocortex work together to create efficient 'conceptual' representations of scenes, enabling us to both recall past experiences and imagine new ones.
Researchers develop nanoparticles that selectively bind to activated astrocytes and microglia cells in the hippocampus of Alzheimer's patients, demonstrating increased nanoparticle transport across the blood brain barrier with age. The study provides valuable insights into advancing nanoparticle-based drug delivery for treating neurode...
Researchers at University College London found that a hunger hormone produced in the gut directly impacts activity of the brain's hippocampus when considering food. The study showed that ghrelin receptors play a crucial role in controlling an animal's instinct to eat, with implications for understanding eating disorders and human health.
Researchers identify somatostatin-positive interneurons as crucial in maintaining cognitive function, and their dysfunction leads to impaired memory and learning. The study uses a toxin to ablate these cells, resulting in mice exhibiting cognitive deficits similar to those seen in aging humans.
A recent study by Ohio State University researchers found that saturated fats can interfere with the creation of new memories in aged brains. However, omega-3 fatty acids, particularly DHA, may help protect brain cells from fat-related inflammation. The study used cell cultures and brain tissue from aging mice to explore the effects of...
Researchers discovered protein p53's role in regulating sociability, repetitive behavior, and hippocampus-related learning and memory in mice. Lowering p53 levels led to changes in gene expressions related to behavior, while elevated p53 levels were linked to positive learning outcomes.
Researchers found that bat's place neurons encoded information about the presence and identity of other bats in their social space. The study reveals how the same hippocampus structure that navigates through space also helps bats navigate complex social behaviors.
A study by Florida Atlantic University and CINVESTAV found that long-term running maintains the connectivity of adult-born hippocampal neurons, which contribute to memory function during aging. Exercise may prevent or delay age-related memory decline by increasing the survival and modifying the network of these neurons.
KNT-127 exhibits anti-stressing and anti-depressant effects in mice, improving social interaction and reducing stress-induced hormone levels. The agent suppresses neuronal inflammation and newborn death without affecting neurogenesis.
A preclinical study suggests that abnormal immune activity in astrocytes is sufficient to cause cognitive deficits in dementia. Astrocytes produce excessive immune messengers, activating neurons and leading to hyperactivity.
Researchers found that exercise releases chemical signals that promote neuronal development in the hippocampus, a crucial area for learning and memory. Astrocytes play a critical role in mediating the effects of exercise on brain health, helping to regulate neuronal activity and prevent hyperexcitability.
Researchers demonstrate therapeutic potential of new neurons generated in adulthood for modulating Alzheimer's disease pathology and functional deficits. Optogenetics and chemogenetics strategies enhance adult-born neurons, restoring cognitive and affective function in mice with Alzheimer's disease.
Researchers at MIT have found a way to reverse neurodegeneration and symptoms of Alzheimer's disease by interfering with an overactive brain enzyme called CDK5. The peptide treatment reduced neurodegeneration, DNA damage, and improved behavior in mice with Alzheimer's.
Research at the University of Massachusetts Amherst shows that circadian disruption from jet lag can harm adult neurogenesis, which supports learning and memory. The study found that the Cryptochrome 1 gene regulates this process and that misalignment can lead to adverse health effects such as dementia and mental illness.
Researchers identified a crucial molecular process involving gene expression in neurons that contributes to early memory loss and Alzheimer's disease. Genetic alterations in mice showed that lack of phosphorylation on beta-2 adrenergic receptors led to poor memory, while PDE inhibitors improved memory function.
A new study published in Current Biology found that the hippocampus and prefrontal cortex must synchronize their neural assemblies to support memory encoding, maintenance, and recall. Disruption of this synchronization leads to memory loss, presenting a viable target for therapeutic interventions.
Researchers have discovered a human-approved medication that can bring back 'lost' memories in mice, suggesting a potential new approach to treating age-induced memory problems or early-stage Alzheimer's disease. The study used optogenetic approaches and the asthma drug roflumilast to revive memories stored in the hippocampus.
Researchers found that clonidine, a common blood pressure medication, can reduce the consolidation of traumatic memories in PTSD patients. By interacting with the adrenergic receptor axis, clonidine interferes with cofilin's ability to form mushroom-shaped dendritic spines, which are essential for memory formation. This suggests that c...
Researchers found that neurons in the hippocampus represent space in a nonlinear hyperbolic geometry that grows outward exponentially with time spent exploring an environment. This discovery provides valuable methods for analyzing data on neurocognitive disorders involving learning and memory.
Researchers found that remote fear memories are permanently stored in connections between memory neurons in the prefrontal cortex. The study suggests that a dysregulation of fear memory consolidation can lead to chronic maladaptive fear in PTSD, affecting about 6% of the population.
Researchers discovered a neural system for self-localization in larval zebrafish using whole-brain functional imaging. The multiregional hindbrain circuit integrates visual information to form a memory of past displacements, correcting for accumulated displacements over many seconds.
Injured mice that received gabapentin showed improved rehab compliance due to mental barriers. Removing dividers between individual exercise lanes increased willingness to participate in group rehab, boosting performance and recovery. The study suggests social support may be beneficial for individuals with spinal cord injury.
Researchers from Xi'an Jiaotong-Liverpool University found that brain stimulation combined with a nose spray containing nanoparticles can improve recovery after ischemic stroke. The treatment increased cognitive and motor functions, and weighed more quickly than those treated with TMS alone.
A Brazilian-American research team has identified a subtype of inhibitory interneurons that can gauge speed with great precision. These neurons are more stable than excitatory neurons and may be linked to spatial memory and the ability to remember routes or locations.
A team of researchers from Florida Atlantic University and Tel Aviv University are investigating the connection between neuroimmune serotonergic interactions and Alzheimer's-related mood disorders. By studying mice with AD-linked mutations, they aim to determine if immune-serotonin crosstalk plays a role in depressive traits.
Research finds that a single dose of alcohol permanently changes brain structure and function, leading to increased risk of addiction. The study used fruit flies and mice models to show that ethanol-induced changes in mitochondrial dynamics and synapse balance contribute to long-lasting behavioral changes.
A new study found that individual details of a memory are parsed and stored elsewhere, in the prefrontal cortex. This separation ensures that exposure to any cue is sufficient to activate the prefrontal cortex for recall of the whole memory.
Researchers mapped neural connections throughout entire brain after TBI, finding increased connections to inhibitory neurons but disrupted relationships. Transplanted interneurons showed promise in reconnecting damaged brain regions.
A recent study published in Neuron sheds new light on ketamine's action on potassium channels in neurons, potentially leading to improved treatments for depression. The research found that ketamine enhances the Kcnq2 potassium channel in a specific subtype of glutamate-sensitive neurons.