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. Author manuscript; available in PMC: 2018 Feb 26.
Published in final edited form as: Nat Neurosci. 2013 Jan 28;16(2):139–145. doi: 10.1038/nn.3303

Figure 2. Forms of memory evolution.

Figure 2

Categories of offline memory processing. All of these forms of offline memory processing have been shown to occur preferentially during sleep. (a) Item consolidation. Individual item-memories can be stabilized and/or enhanced, or they can be forgotten. (b) Item integration. Individual new item memories can be integrated into existing associative memory networks, extending the range of the network and enriching the information associated with the new item memory. (c) Multi-item generalization. Related item-memories encoded over a brief time interval can generate a new memory network and conceptual schema.