Does sleep-dependent consolidation favour weak memories?
| Autor: | Ian Charest, George M. Balanos, Marit Petzka, Bernhard P. Staresina |
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| Rok vydání: | 2020 |
| Předmět: |
Research Report
Cognitive Neuroscience Interference theory Experimental and Cognitive Psychology 02 engineering and technology 050105 experimental psychology Task (project management) 03 medical and health sciences 0302 clinical medicine Memory Humans Learning 0501 psychology and cognitive sciences Wakefulness Episodic memory Memory Consolidation 030304 developmental biology 0303 health sciences Consolidation (soil) 05 social sciences PsyArXiv|Social and Behavioral Sciences|Cognitive Psychology|Memory 021001 nanoscience & nanotechnology bepress|Social and Behavioral Sciences|Psychology|Cognitive Psychology PsyArXiv|Social and Behavioral Sciences Neuropsychology and Physiological Psychology bepress|Social and Behavioral Sciences PsyArXiv|Social and Behavioral Sciences|Cognitive Psychology Memory consolidation Sleep (system call) Psychology Sleep Interference 0210 nano-technology 030217 neurology & neurosurgery Consolidation Cognitive psychology |
| Zdroj: | Cortex; a Journal Devoted to the Study of the Nervous System and Behavior Cortex |
| Popis: | Sleep stabilizes newly acquired memories, a process referred to as memory consolidation. According to recent studies, sleep-dependent consolidation processes might be deployed to different extents for different types of memories. In particular, weaker memories might benefit greater from post-learning sleep than stronger memories. However, under standard testing conditions, sleep-dependent consolidation effects for stronger memories might be obscured by ceiling effects. To test this possibility, we devised a new memory paradigm (Memory Arena) in which participants learned temporospatial arrangements of objects. Prior to a delay period spent either awake or asleep, training thresholds were controlled to yield relatively weak or relatively strong memories. After the delay period, retrieval difficulty was controlled via the presence or absence of a retroactive interference task. Under standard testing conditions (no interference), a sleep-dependent consolidation effect was indeed observed for weaker memories only. Critically though, with increased retrieval demands, sleep-dependent consolidation effects were seen for both weaker and stronger memories. These results suggest that all memories are consolidated during sleep, but that memories of different strengths warrant different testing conditions to unveil their benefit from post-learning sleep. |
| Databáze: | OpenAIRE |
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