Sleep talking versus sleep moaning: electrophysiological patterns preceding linguistic vocalizations during sleep

睡眠(系统调用) 电生理学 心理学 听力学 脑电图 睡眠开始 医学 神经科学 失眠症 精神科 计算机科学 操作系统
作者
Anastasia Mangiaruga,Aurora D’Atri,Serena Scarpelli,Valentina Alfonsi,Milena Camaioni,Ludovica Annarumma,Maurizio Gorgoni,Mariella Pazzaglia,Luigi De Gennaro
出处
期刊:Sleep [Oxford University Press]
卷期号:45 (5) 被引量:5
标识
DOI:10.1093/sleep/zsab284
摘要

Sleep talking (ST) has been rarely studied as an isolated phenomenon. Late investigations over the psycholinguistic features of vocal production in ST pointed to coherence with wake language formal features. Therefore, we investigated the EEG correlates of Verbal ST as the overt manifestation of sleep-related language processing, with the hypothesis of shared electrophysiological correlates with wake language production. From a sample of 155 Highly frequent STs, we recorded 13 participants (age range 19-30 years, mean age 24.6 ± 3.3; 7F) via vPSG for at least two consecutive nights, and a total of 28 nights. We first investigated the sleep macrostructure of STs compared to 13 age and gender-matched subjects. We then compared the EEG signal before 21 Verbal STs versus 21 Nonverbal STs (moaning, laughing, crying, etc.) in six STs reporting both vocalization types in Stage 2 NREM sleep. The 2 × 2 mixed analysis of variance Group × Night interaction showed no statistically significant effect for macrostructural variables, but significant main effects for Group with lower REM (%), total sleep time, total bedtime, sleep efficiency index, and greater NREM (%) for STs compared to controls. EEG statistical comparisons (paired-samples Student's t-test) showed a decrement in power spectra for Verbal STs versus Nonverbal STs within the theta and alpha EEG bands, strongly lateralized to the left hemisphere and localized on centro-parietal-occipitals channels. A single left parietal channel (P7) held significance after Bonferroni correction. Our results suggest shared neural mechanisms between Verbal ST and language processing during wakefulness and a possible functional overlapping with linguistic planning in wakefulness.

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