Articles tagged with Ca3 Cells
A recent study in mice reveals a shared hub of memory cells that links incoming and outgoing signals, allowing the brain to reuse some cells to store many different memories. This 'switchboard' helps maintain stability while learning new information.
Researchers found that the hippocampal CA3 network starts out dense but becomes sparser and more refined as animals mature, following a pruning model. This suggests an initially exuberant connectivity allows for efficient integration of visual, smell, and sound information.
A Cornell University study finds that sleep resets vital brain function by silencing certain parts of the hippocampus, allowing neurons to reset and enable new learning. This mechanism could lead to breakthroughs in boosting memory and erasing negative memories in conditions like Alzheimer's disease and PTSD.
Researchers at the Institute for Basic Science have identified specific neurons in the hippocampus that allow us to recognize individual social counterparts and update their value through interactions. The dorsal CA1 region plays a crucial role in this process, enabling long-term memories of individuals to be formed.
Researchers at IST Austria discovered that key synapses in the hippocampus can send information in both directions, influencing pre-synaptic plasticity. The mossy fiber synapse adapts to the post-synaptic neuron's activity status, improving information storage in downstream networks.
Researchers at Osaka University found that Polβ prevents DNA breaks in brain cells of the hippocampus during early postnatal development, supporting cognitive development. The study also reveals a link between DNA demethylation and increased double-stranded breaks, which can lead to altered gene expression and impaired memory formation.
A new study by Salk researchers finds that altered potassium levels in neurons may contribute to mood swings in bipolar disorder. The study reveals two distinct types of neurons in people with bipolar disorder who respond to lithium and those who don't, highlighting the need for personalized treatment approaches.
The dentate gyrus uses a process called pattern separation to store distinct memories of similar events. Researchers found that parvalbumin-expressing interneurons play a key role in this process, using lateral inhibition to keep similar memories apart.
Salk scientists develop a new way to study brain cell connections, revealing how communication is altered in people with schizophrenia. By creating multiple types of neurons from stem cells and observing their interactions, the team showed that CA3 pyramidal neurons form physical connections both to other CA3 neurons and to DG neurons.
Researchers identify protein Npas4 as key controller of synaptic strength in CA3, essential for encoding contextual memories. Without Npas4, synapses become over-strong and unable to be further strengthened.
Researchers found that CA2 maintains inhibition in connected networks, suppressing signaling and preventing hyperexcitability. Without CA2, mice experience epilepsy-like activity and seizures, highlighting the region's role in regulating brain balance.
Research from RIKEN Brain Science Institute in Japan identifies the brain clock that keeps memories organized across time. Without CA3 input, the neural orchestra loses its conductor, leading to errors in representing space and impairing accurate prediction of spatial location.
Researchers at IST Austria identified a new learning rule that strengthens connections between neurons in the CA3 region of the hippocampus, even when neurons fire in reverse order. This discovery may explain robust learning and storage of spatial information in the brain.
Scientists have found that neurons in a little-studied part of the brain become more active with age, leading to potential new treatments for memory loss and Alzheimer's disease. The study suggests that future therapies will need to account for different effects across various brain regions.
Researchers at Georgetown University Medical Center have discovered a new mechanism that regulates neuronal activity in the hippocampus, allowing for efficient learning and memory processing. The study reveals that synapses between different groups of neurons act as 'volume control', maintaining optimal levels of neurotransmission.
A study by RIKEN-MIT Center found that specific neurons in the dentate gyrus serve distinct roles in memory formation based on whether they were produced from young or old neural stem cells. This discovery could lead to new drug targets for treating memory impairments associated with PTSD and aging.
Scientists have identified a natural protection mechanism in some brain nerve cells during stroke, which could be used to develop treatments to protect other nerve cell types. The research found that one type of nerve cell, the CA3 cell, is more resistant to stroke-induced damage and possesses a mechanism for reducing its susceptibility.
A recent study by UC Irvine researchers found that brief experiences activate neurons and genes associated with memory as effectively as repetitive activities. This discovery can help scientists design better therapies for diseases such as Alzheimer's, which impair the ability to form memories.