Articles tagged with Pyramidal Neurons
A study in mice confirms the presence of two molecules that enable precise connection between inhibitory interneurons and target excitatory neurons. This link regulates information processing and maintains balance in brain circuits, with implications for understanding neuronal disorders such as schizophrenia and autism.
Researchers identified a molecular mechanism linking early-life environments with memory by activating AP-1, which regulates genes involved in neuronal plasticity and learning. Early-life experiences produce long-lasting modulation of AP-1 activity, boosting gene networks that strengthen neuronal connections.
A study published in PLOS Biology found that repeated stress in mice reduces their ability to perceive loud sounds, as measured in the auditory cortex. This altered brain processing is reflected in a behavioral task where stressed mice were more likely to report louder sounds as soft.
A recent study has identified distinct features in two types of brain cells, intratelencephalic (IT) neurons and pyramidal tract (PT) neurons, which may affect their vulnerability to neurodevelopmental conditions. The research highlights the importance of understanding how these brain cells exchange information through their synapses.
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.
Researchers at the University of Alabama at Birmingham found that blocking Tiam1 activity in spinal neurons abrogates morphine tolerance and hyperalgesia in a mouse model. Prolonged morphine treatment increased activated Tiam1 levels, leading to dendritic spine morphological changes.
Scientists have identified key stages in the 'wave of death' - a high-amplitude wave that marks the transition to complete brain silence after oxygen deprivation. The study found that this critical event induces neuronal death throughout the cortex and can be reversible with timely resuscitation.
Researchers characterized changes in cognitive behaviors, neuronal morphology and gene expression in a tauopathy mouse model. The study found significant decreases in dendritic arborization and synaptic gene upregulation over time.
A Penn State-led research team discovered that somatostatin signaling acts to dampen communication among cell types in the prefrontal cortex, promoting exploratory and risk-taking-like behavior. The findings suggest that somatostatin fine-tunes circuits to promote certain behaviors, including decision making.
A new study found that neurons in a key brain region have different functions based on their genetic identity, which could lead to better understanding of the brain's computational flexibility and memory capacity. The diversity of neurons in the CA1 region of the hippocampus was previously unknown and is crucial for memory development.
Researchers at MUSC identified changes in pyramidal neurons contributing to drug seeking. Inhibiting enzyme protein kinase A restored normal function and reduced opioid-seeking behavior.
Researchers found that enhancing NMDAR function via increased serine racemase expression improved attention and cognitive flexibility in middle-aged rats. Upregulating serine racemase in the medial prefrontal cortex also increased glutamatergic synaptic transmission, including NMDAR activity.
Researchers have identified α5-GABAARs on interneurons as key receptors regulating memory formation in the hippocampus. Selectively knocking out these receptors from interneurons impaired spatial memory, while leaving pyramidal neurons unaffected.
Researchers have uncovered the underlying mechanism driving depressive systems in chronic pain, identifying a potential therapeutic target for treatment. Tiam1 protein modulates neural connections, leading to hypersensitivity and depression; ketamine blocks this effect, alleviating symptoms.
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.
Researchers found that primates and non-primates have distinct axonal origins, with axons emerging from dendrites more common in non-primates. This difference may influence neocortical information processing, but the exact function of axon-carrying dendrites remains unknown.
A recent study published in Neuron reveals that general anesthesia induces synchronized activity in layer 5 pyramidal neurons, leading to the loss of consciousness. This finding has significant implications for the development of better anesthetic drugs and improved surgical outcomes.
A new study found that microglia regulate neuronal subtypes differently in response to bacteria, affecting intrinsic excitability. Pyramidal cells exhibited lower excitability, while Purkinje cells showed higher excitability when modulated by microglia.
Researchers at MIT found that different types of dendrites process incoming information in distinct ways before sending it to the neuron's body. This specialization enables neurons to integrate various inputs and generate an appropriate response, particularly in navigation and planning movements.
Researchers found that human neurons have a lower density of ion channels compared to other mammals, suggesting an evolutionary adaptation for energy efficiency. This difference in channel density may enable the human brain to allocate more resources to complex cognitive processes.
Researchers used live human cortical tissue to identify functionally important features that make human neurons unique, revealing a massive amount of diversity among human neocortical pyramidal cells. The team found distinct electrophysiological features between neurons located at different layers in the human neocortex.
Researchers at Cold Spring Harbor Laboratory have discovered a way to reverse the genetic cause of poor stress responses in mice by targeting specific brain cells and feedback loops. The discovery was made possible by understanding how a particular gene, Ophn1, regulates brain activity and stress tolerance.
Epileptic spasms originate from pyramidal cells in the deep layers of the neocortex, generating rhythmic slow oscillations similar to NREM sleep states. This discovery opens up new avenues for developing desperately-needed interventional therapies.
Researchers found that selective pruning of key brain connections in the developing mouse visual cortex clears a path for certain pyramidal neurons to be more active. This process allows for faster communication between the two visual hemispheres, enabling binocular vision and depth perception.
A new fluorescent imaging technique allows scientists to observe up to five different molecule types at a time, enabling them to study complex signaling networks and their relationships. By identifying two populations of neurons with distinct calcium signaling dynamics, researchers hope to understand how they encode long-term memories.
Researchers at Eötvös Loránd University have identified molecular differences in brain neurons that may support drug development for psychiatric disorders. The study focused on the mRNA set of two types of cortical neurons, revealing cell surface proteins that can be targeted to treat certain conditions.
Researchers demonstrate a new x-ray microscopy technique called x-ray holographic nano-tomography (XNH) that can image large volumes of brain tissue at high resolutions. This technique, combined with artificial intelligence-driven image analysis, enables the comprehensive cataloging of neurons and tracing of individual neurons from mus...
Researchers found that individual cortical neurons cannot find order amidst chaotic signals, but the brain averages many neurons' activity for certainty. External inputs can briefly switch networks to a regime of highly reliable spiking, allowing the brain to overcome noise and chaos.
The study found that suppression of glutamatergic pyramidal neurons in the medial prefrontal cortex inhibits both acquisition and expression of cocaine-associated memories. In contrast, GABAergic neurons were not affected. This suggests that mPFC pyramidal neurons are a potential therapeutic target for treating drug addiction.
The Blue Brain Project has developed an algorithm to objectively classify the shapes of neurons in the brain, enabling the creation of a standardized taxonomy of all brain cells. This breakthrough resolves a century-old neuroscience problem and provides a reliable comparative method for researchers.
Researchers found that inhibiting pyramidal neurons in the dorsal or ventral hippocampus after a meal caused rats to start their next meal sooner and consume more food. This study suggests boosting meal memories could help regulate future eating behavior.
Researchers at Ruhr-University Bochum discovered that kainate receptors affect the development of brain cells immediately after birth, causing increased activity and dendrite growth. The discovery sheds light on the role of glutamate receptors in early maturation of nerve cells.
Researchers from Lobachevsky University have developed a memristive device that mimics the behavior of synapses in biological neurons. The device uses pulse signals to create a simulated connection between neuron-like generators, demonstrating reproducible bipolar switching between low and high resistance states.
Researchers found that pyramid-shaped neurons in the amygdala region form cliques to categorize food, including recognizing banana vs. cake, and anticipating taste and texture. This understanding may provide insight into eating disorders.
Scientists at VIB and KU Leuven identify a new protein interaction that regulates the formation of specific synapses between pyramidal neurons and mossy fibers in the hippocampus. This discovery sheds light on the mechanisms that govern unique interactions in neuronal networks.
A study by Stephanie Borgland found that rats eating a 'cafeteria-diet' of high-fat and high-sugar foods developed brain changes in the orbitofrontal cortex, leading to increased motivation to eat despite satiety. Obesity was also observed, highlighting the complex mechanisms behind food attraction.
Scientists have identified distinct subclasses of pyramidal cells in the subiculum, a region crucial for memory and navigation. These subclasses are associated with processing local and global cues, shedding light on the neural mechanisms underlying spatial recognition.
Researchers identified a gene variant linked to increased empathic fear in mice, which may contribute to individual variability in neuropsychiatric conditions. The study found that the variant affects neurons in the cerebral cortex, leading to heightened observational fear response.
Researchers at Max Delbrück Center found that a single spike from pyramidal cells can cause parvalbumin-expressing neurons to fire efficiently and even silence neighboring cells. This mechanism helps the brain filter subtle but important stimuli amidst noise, leading to better signal detection.
A robotic system has been developed to automate the patch clamping technique, allowing for precise targeting of specific neurons. This technology can shed light on normal neuron function and how it goes awry in diseases like Alzheimer's or schizophrenia.
A recent study by Cold Spring Harbor Laboratory reveals the intricate interactions between chandelier cells and pyramidal neurons in the cerebral cortex. The research shows that these inhibitory cells can receive information from hundreds of excitatory cells, influencing their firing patterns and local circuit activity.
Researchers have identified an asymmetric role for pre-synaptic cadherin/catenin complexes in stabilizing post-synaptic spines. This finding challenges the long-held assumption of symmetry in synaptogenesis and has implications for understanding neurodevelopmental disorders such as autism spectrum disorder.
A specific class of inhibitory neurons plays a crucial role in encoding spatial information in the brain. The study found that these neurons, which are essential for maintaining precise maps of spatial information, become dysfunctional when they lack a protein called ErbB4, leading to alterations in spatial learning and memory.
Researchers found that human pyramidal neurons have a specific membrane capacitance that is half of the universal value for biological membranes, improving signal processing and communication within and between cortical neurons. This unique property may be an evolutionary adaptation to compensate for the larger brain and cells in humans.
Researchers successfully integrated transplanted embryonic nerve cells into the visual cortex of adult mice, demonstrating functional connectivity and restoration of network function. This breakthrough holds promise for treating acquired brain diseases, including neurodegenerative illnesses and stroke-induced damage.
Scientists have developed a specific mechanistic explanation of beta waves, suggesting that excitatory synaptic stimulation from the thalamus drives pyramidal neurons to produce these waves. The theory is supported by computer models and measurements in animal models.
Researchers at the Salk Institute used genetic techniques to visualize three brain cell types in the visual cortex, shedding light on how the brain processes visual information. The study provides new insights into neural circuits and their potential implications for neurological disorders like schizophrenia and autism.
Recent advances in voltage-sensitive dye imaging have paved the way for real-time functional imaging of live tissue electrical activity. Research by Larry Cohen and his team has enabled this frontier field, with recent articles demonstrating its legacy.
Researchers found an inhibitory connection between the prefrontal cortex and thalamus, crucial for cognitive functions like attention and decision-making. This discovery may help explain schizophrenia's underlying mechanisms and indicate a path to new treatments.
Researchers created a publicly available website, neuroelectro.org, to collect and standardize data on neuronal function. The site enables the comparison of physiological information across different types of neurons, promoting new methods of analysis.
Researchers found that somatostatin neurons temporarily cloak synapses in the neocortex, silencing neighboring excitatory neurons and altering brain circuit structure. This discovery could dramatically change how we understand and use the connectome.
Scientists at Karolinska Institutet have created a detailed map of cortical cell types and the genes active within them using single-cell sequencing. They identified 47 different kinds of cells, including hitherto unknown types, which can help shed more light on diseases like multiple sclerosis.
A recent study by Brown University neuroscientists has shed light on the brain's cycle of activity and quiet called "up" and "down" states. The research found that all types of interneurons contribute uniquely to these cycles, with inhibitory cells playing a vital role in maintaining balance between excitation and inhibition.
Researchers found that somatosensory stimulation decreases the firing of pyramidal cells and increases interneuron activity, suggesting a suppressive effect on neuronal hyperexcitability. This study provides insights into signal processing in the hippocampus and explores potential therapeutic applications for brain disorders.
A new study suggests that blocking endocannabinoids, the brain's internal versions of marijuana's psychoactive chemicals, may trigger early Alzheimer's deficits. A-beta, a substance strongly suspected to play a key role in Alzheimer's, impairs learning and memory by blocking endocannabinoids' beneficial action in the brain.
NYU Langone researchers have identified the type of inhibitory interneurons responsible for oxytocin's effects on brain function. The study found that oxytocin increases the reliability of stimulated impulses, improving brain function and potentially relevant to autism-spectrum disorder.
Researchers discovered significant brain epigenome changes from birth to adolescence, transforming the frontal cortex and shaping communication spaces between neurons. The study's findings have profound implications for understanding brain biology and potentially treating neurodevelopmental disorders like autism and schizophrenia.
Researchers reveal that inhibitory interneuron circuits change their firing rates during map formation and flickering, playing a crucial role in learning. The study also shows that these changes are due to map-specific connections between pyramidal cells and interneurons.
A team led by Professor Z. Josh Huang has revealed the birth timing and embryonic origin of critical inhibitory brain cells called chandelier cells, tracing their specific paths into the cerebral cortex of mouse brains. This breakthrough sheds light on the genetic programming of brain development and the role of these cells in balancin...
A team of MIT neuroscientists has created a way to monitor brain-cell activity by detecting calcium ions, which could provide insights into the origins of autism and obsessive-compulsive disorder. The technique allows for pinpointing specific cell types involved in psychiatric diseases.