What physiological process is behind memory?5 answersThe physiological process behind memory involves the recruitment of cellular programs of growth by signaling molecules, alterations in the display of cell surface adhesion molecules, and the modulation of cell-cell interactions. Additionally, memory is encoded, stored, and decoded through the manipulation of trace metals within the neural extracellular matrix, which affects the electro-elastic interactions of neurons. The hippocampus plays a crucial role in declarative memory, and its physiology is closely linked to navigation in real and mental spacetime. Structural and synaptic plasticity are essential for the successful maturation and integration of memory, while Alzheimer's disease leads to the progressive loss of synapses and memory decay. Memories are stored through alterations in the strength of neuronal connections within neural circuitry, highlighting the importance of synaptic plasticity in learning and memory.
How does the brain process and retain information during the learning process?5 answersThe brain processes and retains information during the learning process through various mechanisms. Initially, the sensory response to information is influenced by the characteristics of the initial information, such as psychophysical, emotional, discrepant, and manding stimuli. This response is followed by the storage of information in sensory memory. Information is then selected to enter short-term memory (STM) through the working memory mechanism, which involves the phonological Loop area, Episode buffer, and Visuo-spatial Sketch Pad. From STM, information is further processed and stored in long-term memory (LTM) through repetition and coding mechanisms. LTM storage occurs in the areas of episodic memory, semantic memory, and procedural memory. The brain's processing of information also involves the increase in EEG power in the theta frequency range during information perception, which may reflect increased attention. Additionally, the brain's neuronal systems, including neurons and synapses, play a role in memory formation and storage. Overall, the brain utilizes various cognitive processes and neural mechanisms to process and retain information during the learning process.
How are memories stored in the brain?5 answersMemories are stored in the brain through a combination of synaptic changes, neural activity patterns, and the consolidation of information. The physiological manifestation of a specific memory trace is represented by a population of neurons called engram cells, which undergo dynamic changes in gene expression that alter their synaptic connectivity and excitability. Attractor dynamics in neural networks have been proposed as a theoretical framework for learning and memory, where memories are represented by distinct patterns of neural activity. Synapses are commonly believed to be the storage sites of memory, while molecules within the cell body have also been proposed as alternative storage sites. Spike-timing dependent plasticity (STDP) is a mechanism through which the brain can learn and store information, with synapses potentially containing embedded information. The hippocampus plays a crucial role in memory formation and consolidation, replaying patterns of brain activity during sleep to transfer information to other parts of the brain for storage.
What is memory to the brain?5 answersMemory is the brain's ability to store and remember information. It is a complex process involving different phases such as encoding, consolidation, storage, and retrieval. Memories are stored in engrams, which are ensembles of neuronal populations that represent the minimal correlate of experience in brain circuits. The formation and maintenance of engrams require protein synthesis and specific transcriptional programs. Memory systems in the brain are not unitary capacities but rather collections of distinct systems, each with its own developmental course. Different types of memory, such as declarative memory, have specific neural correlates that mature over time. The brain has the ability to create and destroy memories, and it can also generate false memories. Overall, memory is a fundamental and highly specialized function of the brain that involves various processes and mechanisms.
What is memory to the brain?5 answersMemory is the brain's ability to encode, store, and retrieve information or data when needed. It is a fundamental process that allows us to perform daily activities, form relationships, and learn and progress in life. Memory is not a unitary capacity but rather a collection of distinct systems that process different types of information using specific mechanisms and neural correlates. These memory systems have their own developmental course, explaining the heterogeneity of mnemonic competencies in children. Memory can be classified based on temporal aspects or content, and it involves both conscious and unconscious processes. The brain's memory systems include declarative memory (episodic and semantic memory) and implicit memory (procedural memory). The neural architecture supporting these memory systems is complex and involves multiple brain areas. Understanding memory is crucial for studying psychological and neurodegenerative disorders that can arise from dysfunction in memory processes.
What part of the brain is important for working memory?2 answers