Science, Space and Technology News 2023
A new theory suggests the utility of a memory for future situations dictates its location in the brain, either in the hippocampus or the neocortex. This challenges the classical view by emphasizing that memories consolidate to the neocortex based on their generalizability, not age.The theory offers a new way of understanding systems consolidation, a process that transfers certain memories from the hippocampus – where they are initially stored – to the neocortex — where they reside long term.
In recent years, psychologists proposed theories to explain this more complicated view of systems consolidation, but no one has yet figured out mathematically what determines whether a memory stays in the hippocampus or whether it is consolidated in the neocortex. Generalizations are constructed from the reliable and predictable components of memories, enabling us to apply them to other situations. We can generalize certain features of memories to help us understand the world, like the fact that canyons predict the presence of water.
Under this view, consolidation doesn’t copy memories from one area of the brain to another but rather creates a new memory that is a generalization of previous memories. The amount that a memory can be generalized – not its age — determines whether it is consolidated or remains in the hippocampus.
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