gunshots), elicit increased responses in the temporal auditory cortex when compared with neutral stimulation ( Belin et al. These types of stimuli, together with other nonvocal sounds (e.g. In the auditory domain, emotional vocalizations constitute a privileged way of communicating imminent danger across conspecifics ( Sauter et al. The human brain has evolved to efficiently detect and respond to emotional signals in order to promote survival ( Vuilleumier 2005 Domínguez-Borràs and Vuilleumier 2013). Our findings also suggest that emotion-specific reactivity during sleep, and not generalized alertness, may contribute to the encoding/retrieval of dreams.īrain oscillations, dream recall, emotion processing, ERP, NREM sleep Introduction Our results reveal that brain reactivity to affective salience is preserved during NREM and is selectively associated to individual memory for dreams. In contrast, dream recall correlations were absent for neutral or control stimuli. Similar correlations with dream recall were observed for beta and sigma responses, but not for theta. Interestingly, sleep ERP amplitude and arousals after emotional voices increased linearly with participants’ dream recall frequency. Likewise, EEG arousals (sleep perturbations) increased selectively after the emotional voices, indicating emotion reactivity. neutral voices, both in wakefulness and NREM. Event-related potentials (ERPs) differed for emotional vs. Then, we tested how these responses varied with individual dream recall frequency.
Using electroencephalography (EEG), we characterized the neural responses of healthy individuals to emotional, neutral voices, and control stimuli, both during wakefulness and NREM sleep. Notably, dream recall frequency has been associated with stimulus reactivity during sleep, with enhanced stimulus-driven responses in high vs.
However, emotion detection during sleep is poorly understood and may be influenced by individual sleep characteristics or neural reactivity. The waking brain efficiently detects emotional signals to promote survival.
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