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• W3137158636 abstract "The ability to store and retrieve learned information over prolonged periods of time is an essential and intriguing property of the brain. Insight into the neurobiological mechanisms that underlie memory consolidation is of utmost importance for our understanding of memory persistence and how this is affected in memory disorders. Recent evidence indicates that a given memory is encoded by sparsely distributed neurons that become highly activated during learning, so-called engram cells. Research by us and others confirms the persistent nature of cortical engram cells by showing that these neurons are required for memory expression up to at least 1 month after they were activated during learning. Strengthened synaptic connectivity between engram cells is thought to ensure reactivation of the engram cell network during retrieval. However, given the continuous integration of new information into existing neuronal circuits and the relatively rapid turnover rate of synaptic proteins, it is unclear whether a lasting learning-induced increase in synaptic connectivity is mediated by stable synapses or by continuous dynamic turnover of synapses of the engram cell network. Here, we first discuss evidence for the persistence of engram cells and memory-relevant adaptations in synaptic plasticity, and then propose models of synaptic adaptations and molecular mechanisms that may support memory persistence through the maintenance of enhanced synaptic connectivity within an engram cell network." @default.
• W3137158636 created "2021-03-29" @default.
• W3137158636 creator A5011229197 @default.
• W3137158636 creator A5041737280 @default.
• W3137158636 creator A5046661343 @default.
• W3137158636 creator A5049925430 @default.
• W3137158636 creator A5081486201 @default.
• W3137158636 date "2021-03-24" @default.
• W3137158636 modified "2023-10-10" @default.
• W3137158636 title "A Synaptic Framework for the Persistence of Memory Engrams" @default.
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