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Updated: Apr 12, 2026

Eye Tracking, Cortisol, and a Sleep vs. Wake Consolidation Delay: Combining Methods to Uncover an Interactive Effect of Sleep and Cortisol on Memory
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Eye Tracking, Cortisol, and a Sleep vs. Wake Consolidation Delay: Combining Methods to Uncover an Interactive Effect of Sleep and Cortisol on Memory

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Emotional memory processing is influenced by sleep quality.

Daniela Tempesta1, Luigi De Gennaro2, Vincenzo Natale3

  • 1Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy.

Sleep Medicine
|May 27, 2015
PubMed
Summary
This summary is machine-generated.

Poor sleep quality and sleep deprivation impair memory recognition accuracy. Poor sleep also makes memories more negative, affecting emotional tone.

Keywords:
Affective valenceEmotion regulationMemory consolidationSleep deprivation

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Area of Science:

  • Cognitive Neuroscience
  • Sleep Science

Background:

  • Sleep significantly impacts emotional memory recall, with enhancement after sleep and impairment after deprivation.
  • The specific effects of poor sleep quality versus total sleep deprivation on memory accuracy and emotional tone remain less understood.

Purpose of the Study:

  • To investigate how poor sleep quality and sleep deprivation affect emotional memory recognition accuracy.
  • To determine the influence of poor sleep quality and sleep deprivation on the affective tone of recalled memories.

Main Methods:

  • Seventy-five participants were divided into poor sleeper (PS), good sleeper (GS), and sleep deprivation (SD) groups.
  • Participants encoded 90 pictures, rating their valence and arousal.
  • Memory recall and affective ratings were assessed 1 hour (R1) and after one night of sleep/deprivation (R2).

Main Results:

  • Recognition accuracy was significantly higher in the PS and GS groups compared to the SD group.
  • Remembered pictures exhibited a more negative emotional valence in the SD and PS groups.
  • Emotional valence was preserved in the GS group after a night of sleep.

Conclusions:

  • Poor sleep quality, similar to sleep deprivation, negatively impacts the emotional valence of memories.
  • These effects on affective tone occur independently of depressive mood and are linked to specific sleep quality influences.
  • Emotional memory consolidation remains intact, but its affective quality is altered by poor sleep.