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Odor Cues During Slow-Wave Sleep Prompt Declarative Memory Consolidation Rasch, B., Buchel, C., Gais, S., & Born, J.

Odor Cues During Slow-Wave Sleep Prompt Declarative Memory Consolidation Rasch, B., Buchel, C., Gais, S., & Born, J. Presented by: Suiki Zhang. Introduction. sleep facilitates the consolidation of newly acquired memories for long-term storage

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Odor Cues During Slow-Wave Sleep Prompt Declarative Memory Consolidation Rasch, B., Buchel, C., Gais, S., & Born, J.

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  1. Odor Cues During Slow-Wave Sleep Prompt Declarative Memory ConsolidationRasch, B., Buchel, C., Gais, S., & Born, J. Presented by: Suiki Zhang

  2. Introduction • sleep facilitates the consolidation of newly acquired memories for long-term storage • Consolidation of hippocampus-dependent memories benefits particularly from slow-wave sleep (SWS) • Odours are excellent contextual retrieval cues for various types of memories

  3. Introduction • Purpose: used an odour to reactivate memories in human during sleep • Hypothesis: odour-induced reactivations boosting the consolidation of hippocampus-dependent declarative memories are related to hippocampal activity during SWS

  4. Methods • 18 participants • Olfactory stimulus = smell of a rose • Learned a 2D object location task (locations of 15 card pairs on a computer screen) & a procedural finger-tapping task in the evening before sleep • 4 different conditions

  5. Methods

  6. Results • Re-exposure to the odour during SWS improved the retention of hippocampus-dependent memories but not of hippocampus-independent procedural memories • Odour re-exposure was ineffective during REM sleep or wakefulness or when the odour had been omitted prior learning

  7. Results

  8. Results

  9. Discussion • Odour cues activate the hippocampus during SWS to a much greater extent than during wakefulness • Supports the theory that memory consolidation evolves from repeated reactivation of newly encoded hippocampal memory during SWSeventually leads to transfer of the memory to cortical regions for long term storage

  10. My Opinion • Strengths: • Clear diagrams/graphs • Interesting study • Weaknesses: - unorganized; no headings for sections • Next steps: - Examine whether the type of the odour would have different effects

  11. Cited Article • Rasch, B., Buchel, C., Gais, S., & Born, J. (2007). Odor cues during slow-wave sleep prompt declarative memory consolidation. Science magazine, 315, 1426-1429.

  12. Questions?

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