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Sleep talking versus sleep moaning: electrophysiological patterns preceding linguistic vocalizations during sleep
Anastasia Mangiaruga1, Aurora D'Atri2, Serena Scarpelli1
1Department of Psychology, Sapienza, University of Rome, Rome, Italy.
Sleep
|May 13, 2022
Summary
This study explored sleep talking (ST) and found distinct brain activity patterns. Verbal sleep talking shows unique EEG signatures, suggesting links to wakeful language processing.
Area of Science:
- Neuroscience
- Sleep Science
- Linguistics
Background:
- Sleep talking (ST) is an understudied phenomenon.
- Previous research suggests ST vocalizations share features with wakeful language.
Purpose of the Study:
- Investigate the electroencephalogram (EEG) correlates of verbal sleep talking.
- Test the hypothesis that ST shares electrophysiological markers with wakeful language production.
Main Methods:
- Recorded 13 frequent sleep talkers using polysomnography (vPSG).
- Compared sleep macrostructure between sleep talkers and controls.
- Analyzed EEG signals during verbal versus nonverbal sleep talking events in Stage 2 NREM sleep.
Main Results:
- Sleep talkers exhibited altered sleep architecture (less REM, lower sleep efficiency).
- Verbal sleep talking showed reduced theta and alpha EEG power, left-lateralized to centro-parietal-occipital regions.
- A specific left parietal channel (P7) was significant after correction.
Conclusions:
- Verbal sleep talking may involve neural mechanisms similar to wakeful language processing.
- Suggests a potential functional overlap between sleep talking and linguistic planning during wakefulness.
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