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  • Title: Sleep-related cognitive processes, arousal, and emotion dysregulation in insomnia disorder: the role of insomnia-specific rumination.
    Author: Palagini L, Moretto U, Dell'Osso L, Carney C.
    Journal: Sleep Med; 2017 Feb; 30():97-104. PubMed ID: 28215272.
    Abstract:
    OBJECTIVE: Insomnia-specific rumination has presented in subjects with insomnia. Research has identified hyperarousal as a key factor, with both trait and state components. It has been shown that emotion dysregulation also plays a role in insomnia. Hence, the aim was to investigate how insomnia rumination is associated with both trait- and state-dependent arousal and emotion dysregulation in insomnia. METHODS: Sixty-eight subjects with insomnia disorder (DSM-5) and 36 good sleepers were evaluated using: Insomnia Severity Index (ISI), Daytime Insomnia Symptom Response Scale (DISRS), Arousal Predisposition Scale (APS), Pre-sleep Arousal Scale (PSAS), and Difficulties in Emotion Regulation Scale (DERS). Univariate and multivariate regression analyses and mediation analyses were performed. RESULTS: Subjects with insomnia (F 41, mean age 50.2 ± 10) presented higher scores than good sleepers (F 22, mean age 49.7 ± 14) in all the scales (ISI, DISRS, APS, PSAS, DERS; p < 0.0001). Insomnia rumination was directly correlated with trait (APS, B = 0.22, p < 0.0001) pre-sleep state arousal (PSAS cognitive B = 0.22, p < 0.0001, PSAS somatic B = 0.24, p < 0.0001) and emotion dysregulation (B = 0.5, p = 0.03). It mediated the association between trait and pre-sleep state hyperarousal (Z = 3.3, p = 0.0008), the bidirectional association between cognitive and somatic arousal (p = 0.02), and the association between trait hyperarousal and emotion dysregulation (Z = 2.3, p = 0.04). CONCLUSIONS: In insomnia, specific rumination is related to both trait predisposition to arousal and to state-dependent arousal. It is also related to emotion dyregulation. Insomnia-specific ruminative response style may modulate the complex association between trait- and state-dependent arousal factors and arousal and emotion regulation in insomnia. In this framework, a broad range of cognitive processes may be considered when dealing with subjects with insomnia: the use of rumination-oriented psychological strategies could be important.
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