Natural sleep loss is associated with lower mPFC activity during negative distracter processing
Annika Dimitrov1, Jonathan Nowak2, Armin Ligdorf2
1Department of Psychiatry and Psychotherapy CCM, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Berlin Institute of Health, Humboldt-Universität zu Berlin, Campus Charité Mitte, Charitéplatz 1, 10117, Berlin, Germany. annika.dimitrov@charite.de.
Cognitive, Affective & Behavioral Neuroscience
|January 20, 2021
Summary
Chronic sleep loss impacts emotional processing and brain activity. Reduced activity in key brain regions involved in emotion regulation was linked to greater habitual sleep loss, potentially increasing vulnerability to affective disorders.
Area of Science:
- Neuroscience
- Psychology
- Sleep Science
Background:
- Sleep loss negatively affects emotional and cognitive functions.
- Understanding the neural mechanisms linking sleep loss, emotion, and cognition is crucial.
Purpose of the Study:
- To investigate the association between habitual sleep loss and brain activity during an emotional working memory task.
- To explore the interplay between emotion and cognition under conditions of sleep deprivation.
Main Methods:
- Forty-six healthy males reported typical sleep patterns (Munich Chronotype Questionnaire) and recent sleep loss (sleep diary).
- Participants underwent fMRI while performing a working memory task with emotional distracters (negative vs. neutral).
- Brain activity differences between negative and neutral distracters were analyzed in relation to sleep loss measures.
Main Results:
- Habitual sleep loss, measured by the Munich Chronotype Questionnaire, was negatively associated with brain activity in the rostral anterior cingulate cortex (ACC) and dorsomedial prefrontal cortex (dmPFC).
- This reduced activity in response to negative distracters occurred during emotionally negative compared to neutral distraction.
- Recent sleep loss, assessed via sleep diary, did not show a significant association with this brain activity.
Conclusions:
- Habitual sleep loss is linked to diminished neural responses in emotion-regulatory brain regions (ACC, dmPFC).
- This suggests that chronic sleep loss may lead to less adaptive emotional processing.
- Reduced emotional regulation due to chronic sleep loss could increase vulnerability to affective disorders.
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