Cited by 218Sleep and related disordersSleep and Wakefulness ResearchAnxiety, Depression, Psychometrics, Treatment, Cognitive Processes

Hyperarousal in insomnia disorder: Current evidence and potential mechanisms

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Dressle, Raphael J., Riemann, Dieter·2023·Journal of Sleep Research

Abstract

Summary: Insomnia disorder is among the most frequent mental disorders, making research on its aetiology and pathophysiology particularly important. A unifying element of many aetiological and pathophysiological models is that they support or even centre on the role of some form of hyperarousal. In this theoretical review, we aim to summarise the current evidence on hyperarousal in insomnia. Hyperarousal is discussed as a state of relatively increased arousal in physiological, cortical and cognitive‐emotional domains. Regarding physiological hyperarousal, there is no conclusive evidence for the involvement of autonomous variables such as heart rate and heart rate variability, whereas recent evidence points to a pathophysiological role of neuroendocrine variables. In addition, current literature supports a central involvement of cortical arousal, that is, high‐frequency electroencephalographic activity. An increasingly important focus in the literature is on the role of other microstructural sleep parameters, especially the existence of microarousals during sleep. Beyond that, a broad range of evidence exists supporting the role of cognitive‐emotional hyperarousal in the form of insomnia‐related thought and worries, and their concomitant emotional symptoms. Besides being a state marker of insomnia, hyperarousal is considered crucial for the predisposition to insomnia and for the development of comorbid mental disorders. Thus, beyond presenting evidence from cross‐sectional studies on markers of hyperarousal in insomnia, hypotheses about the mechanisms of hyperarousal are presented. Nevertheless, longitudinal studies are needed to further elucidate the mechanism of hyperarousal throughout the course of the disorder, and future studies should also focus on similarities and differences in hyperarousal across different diagnostic entities.

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  • The relationships between pre-sleep arousal, the primary anxiety factor underlying insomnia, and the six individual processes making up PI remain unexplored.

    “However, the relationships between pre‐sleep arousal, the primary anxiety factor underlying insomnia (Dressle & Riemann, 2023) and the six individual processes making up PI remain unexplored to the best of our knowledge.”

    From Associations between psychological inflexibility processes, pre‐sleep arousal and sleep quality. (2025) · cites this paper as Dressle & Riemann, 2023

    Section 6.2.4 describes cognitive arousal, often intensified before sleep, as central to many insomnia models and linked to worry and rumination. It does not establish pre-sleep arousal as the primary anxiety factor underlying insomnia. The statement that its relationships with six PI processes remain unexplored is the citing authors’ own qualification, not a finding attributed to this source. (LLM, conf=0.82)

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  • Over time, this leads to a conditioned state of heightened alertness and tension in response to sleep-related cues, making it even harder to fall asleep.

    “Over time, this leads to a conditioned state of heightened alertness and tension in response to sleep‐related cues, making it even harder to fall asleep (Dressle & Riemann, 2023; Espie et al., 2006).”

    From Associations between psychological inflexibility processes, pre‐sleep arousal and sleep quality. (2025) · cites this paper as Dressle & Riemann, 2023

    Section 3 identifies conditioning effects in the bed environment as a potential cause of hyperarousal, and section 6.2.4 says attention to sleep-related cues can amplify cognitive arousal. The paper also links arousal to difficulty initiating sleep, but it does not establish that a conditioned response to those cues develops over time; the claim presents that proposed mechanism as fact. (LLM, conf=0.82)

    Experimental — accuracy not yet measured
  • Metacognitive beliefs can amplify the emotional salience of primary sleep-related cognitions, increase attentional bias toward sleep-related threats, and paradoxically intensify pre-sleep arousal when individuals attempt to suppress unwanted thoughts.

    “Metacognitive beliefs can amplify the emotional salience of primary sleeprelated cognitions, increase a entional bias toward sleep-related threats, and paradoxically intensify pre-sleep arousal when individuals a empt to suppress unwanted thoughts [15,16].”

    From Pre-Sleep Anxiety: Mechanisms and Therapeutic Approaches in Clinical Practice. (2026) · cites this paper as [15]

    Section 6.2.4 (page not provided) says that metacognitions and thought suppression influence pre-sleep cognitive arousal, and describes selective attention to sleep-related cues. It does not say that metacognitive beliefs specifically increase the emotional salience of sleep-related thoughts or cause that attentional bias, nor does it explicitly describe a paradoxical increase in arousal from suppressing unwanted thoughts. (LLM, conf=0.85)

    Experimental — accuracy not yet measured
  • The hyperarousal model of insomnia suggests that when people overthink and focus excessively on trying to sleep, they create mental and physical associations that interfere with sleep.

    “The hyperarousal model of insomnia suggests that when people overthink and focus excessively on trying to sleep, they create mental and physical associations that interfere with sleep.”
  • Increased pre-sleep arousal plays a key role in the maintenance of insomnia.

    “increased pre‐sleep arousal plays a key role in the maintenance of insomnia.”

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Authors
Dressle, R. J., & Riemann, D.
Affiliations
University of Freiburg (DE)
Corresponding author
Dressle, Raphael J.
Venue
Journal of Sleep Research
Publisher
Wiley
Published
2023-05-14
Volume
32
Issue
6
Pages
e13928-e13928
ISSN
  • 0962-1105 (ISSN-L)
  • 1365-2869
OpenAlex
W4376631032
Cited by
218
References
164
Citations by year
2026: 108 · 2025: 70 · 2024: 32 · 2023: 8
FWCI
9.20
Type
journal article
Language
en
Open access
Locations
  • Journal of Sleep Research (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
Topics
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Anxiety, Depression, Psychometrics, Treatment, Cognitive Processes
Keywords
insomnia, hyperarousal, insomnia pathophysiology, heart rate variability, cortical arousal, microarousals, comorbid mental disorders
MeSH terms
Arousal, Cross-Sectional Studies, Emotions, Humans, Sleep Initiation and Maintenance Disorders, Sleep

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