Cited by 49Sleep and Wakefulness ResearchNeural dynamics and brain functionSleep and related disorders

The Significance of Sigma Neurofeedback Training on Sleep Spindles and Aspects of Declarative Memory

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Berner, I., Schabus, M., Wienerroither, T., Klimesch, W.·2006·Applied Psychophysiology and Biofeedback

Abstract

The functional significance of sleep spindles for overnight memory consolidation and general learning aptitude as well as the effect of four 10-minute sessions of spindle frequency (11.6-16 Hz, sigma) neurofeedback-training on subsequent sleep spindle activity and overnight performance change was investigated. Before sleep, subjects were trained on a paired-associate word list task after having received either neurofeedback training (NFT) or pseudofeedback training (PFT). Although NFT had no significant impact on subsequent spindle activity and behavioral outcomes, there was a trend for enhanced sigma band-power during NREM (stage 2 to 4) sleep after NFT as compared to PFT. Furthermore, a significant positive correlation between spindle activity during slow wave sleep (in the first night half) and overall memory performance was revealed. The results support the view that the considerable inter-individual variance in sleep spindle activity can at least be partly explained by differences in the ability to acquire new declarative information. We conclude that the short NFT before sleep was not sufficient to efficiently enhance phasic spindle activity and/or to influence memory processing. NFT was, however, successful in increasing sigma power, presumably because sigma NFT effects become more easily evident in actually trained frequency bands than in associated phasic spindle activity.

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  • Indicators of sleep spindle expression consistently correlated with the amount of overnight retention of declarative memories.

    “Furthermore, indicators of sleep spindle expression consistently correlated with the amount of overnight retention of declarative memories (86,213,214,235,446,562,822,1016,1024,1037,1044,1057).”

    From About Sleep's Role in Memory (2013) · cites this paper as [86]

    The Results section reports no significant correlation between spindle activity and overnight change in memory performance. The Discussion likewise says this study did not find the expected involvement of spindle activity in overnight consolidation. Its positive correlations concern overall memory performance, not overnight retention; the Introduction describes positive findings from earlier studies. (LLM, conf=0.89)

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  • Neurofeedback training to voluntarily increase EEG power in the 11.6-16 Hz sigma frequency band produced a small increase in sigma power also during subsequent sleep, but this increase was not associated with any change in the overnight retention of declarative memories.

    “In another approach, neurofeedback training to voluntarily increase EEG power in the 11.6 -16 Hz sigma frequency band produced a small increase in sigma power also during subsequent sleep (86).This increase, however, was not associated with any change in the overnight retention of declarative memories.”

    From About Sleep's Role in Memory (2013) · cites this paper as [86]

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Authors
Berner, I., Schabus, M., Wienerroither, T., & Klimesch, W.
Affiliations
University of Salzburg (AT)
Corresponding author
Berner, I.
Venue
Applied Psychophysiology and Biofeedback
Published
2006-06
Volume
31
Issue
2
Pages
97-114
ISSN
  • 0363-3586 (ISSN-L)
  • 1090-0586
  • 1573-3270
OpenAlex
W2002191748
Cited by
49
References
44
Citations by year
2025: 3 · 2024: 4 · 2023: 1 · 2022: 3 · 2021: 2 · 2020: 4 · 2019: 1 · 2018: 1 · 2017: 7 · 2016: 3 · 2015: 2 · 2014: 2 · 2013: 4 · 2012: 3
FWCI
0.97
Type
journal article
Language
en
Open access
Locations
  • Applied Psychophysiology and Biofeedback (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
Keywords
sleep spindles, declarative memory, memory consolidation, slow-wave sleep, NREM sleep, paired-associate learning
MeSH terms
Adolescent, Adult, Alpha Rhythm, Anxiety, Biofeedback, Psychology, Electroencephalography, Female, Humans, Learning, Male, Memory, Psychiatric Status Rating Scales, Psychomotor Performance, Sleep, Sleep Stages

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