|Abstract||In a laudable effort to move beyond simplistic "All-or-Nothing" views on the role of sleep in memory consolidation, Walker proposes that memory traces acquired during a learning episode further undergo at least two distinct sorts of modifications after practice has ended (that is, "off-line"): Consolidation-based stabilization (CBS) and consolidation-based enhancement (CBE). The first set of processes would be dependent on wakefulness, while the second would be dependent on sleep. While we certainly agree with the author that previous characterizations of the role of sleep during memory formation has tended to focus on simplistic distinctions, it also appears to us that Walker's own proposal, in which a sharp distinction is made between wake-dependent CBS and sleep-dependent CBE, falls into the same trap.|
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