Emotional speech synchronizes brains across listeners and engages large-scale dynamic brain networks

Speech provides a powerful means for sharing emotions. Here we implement novel intersubject phase synchronization and whole-brain dynamic connectivity measures to show that networks of brain areas become synchronized across participants who are listening to emotional episodes in spoken narratives. T...

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Veröffentlicht in:NeuroImage (Orlando, Fla.) Fla.), 2014-11, Vol.102, p.498-509
Hauptverfasser: Nummenmaa, Lauri, Saarimäki, Heini, Glerean, Enrico, Gotsopoulos, Athanasios, Jääskeläinen, Iiro P., Hari, Riitta, Sams, Mikko
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container_title NeuroImage (Orlando, Fla.)
container_volume 102
creator Nummenmaa, Lauri
Saarimäki, Heini
Glerean, Enrico
Gotsopoulos, Athanasios
Jääskeläinen, Iiro P.
Hari, Riitta
Sams, Mikko
description Speech provides a powerful means for sharing emotions. Here we implement novel intersubject phase synchronization and whole-brain dynamic connectivity measures to show that networks of brain areas become synchronized across participants who are listening to emotional episodes in spoken narratives. Twenty participants' hemodynamic brain activity was measured with functional magnetic resonance imaging (fMRI) while they listened to 45-s narratives describing unpleasant, neutral, and pleasant events spoken in neutral voice. After scanning, participants listened to the narratives again and rated continuously their feelings of pleasantness–unpleasantness (valence) and of arousal–calmness. Instantaneous intersubject phase synchronization (ISPS) measures were computed to derive both multi-subject voxel-wise similarity measures of hemodynamic activity and inter-area functional dynamic connectivity (seed-based phase synchronization, SBPS). Valence and arousal time series were subsequently used to predict the ISPS and SBPS time series. High arousal was associated with increased ISPS in the auditory cortices and in Broca's area, and negative valence was associated with enhanced ISPS in the thalamus, anterior cingulate, lateral prefrontal, and orbitofrontal cortices. Negative valence affected functional connectivity of fronto-parietal, limbic (insula, cingulum) and fronto-opercular circuitries, and positive arousal affected the connectivity of the striatum, amygdala, thalamus, cerebellum, and dorsal frontal cortex. Positive valence and negative arousal had markedly smaller effects. We propose that high arousal synchronizes the listeners' sound-processing and speech-comprehension networks, whereas negative valence synchronizes circuitries supporting emotional and self-referential processing. •We model how emotional speech synchronizes brains across listeners.•Participants listened to emotional and neutral narratives during fMRI scan.•Arousal synchronized auditory cortices and Broca's area.•Valence synchronized limbic system, prefrontal, and orbitofrontal cortices.•Valence and arousal triggered distinct patterns of dynamic functional connectivity.
doi_str_mv 10.1016/j.neuroimage.2014.07.063
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Here we implement novel intersubject phase synchronization and whole-brain dynamic connectivity measures to show that networks of brain areas become synchronized across participants who are listening to emotional episodes in spoken narratives. Twenty participants' hemodynamic brain activity was measured with functional magnetic resonance imaging (fMRI) while they listened to 45-s narratives describing unpleasant, neutral, and pleasant events spoken in neutral voice. After scanning, participants listened to the narratives again and rated continuously their feelings of pleasantness–unpleasantness (valence) and of arousal–calmness. Instantaneous intersubject phase synchronization (ISPS) measures were computed to derive both multi-subject voxel-wise similarity measures of hemodynamic activity and inter-area functional dynamic connectivity (seed-based phase synchronization, SBPS). Valence and arousal time series were subsequently used to predict the ISPS and SBPS time series. 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1095-9572
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source MEDLINE; Access via ScienceDirect (Elsevier); ProQuest Central UK/Ireland
subjects Adult
Affect - physiology
Arousal
Biological and medical sciences
Brain
Brain - physiology
Brain Mapping
Connectivity
Electroencephalography Phase Synchronization
Emotion
Emotions
Evoked Potentials, Auditory
Female
Fundamental and applied biological sciences. Psychology
Humans
Language
Listening
Magnetic Resonance Imaging
Male
Medical imaging
Narratives
Nerve Net - physiology
Network
Social interaction
Speech - physiology
Speech comprehension
Speech Perception - physiology
Synchronization
Vertebrates: nervous system and sense organs
Young Adult
title Emotional speech synchronizes brains across listeners and engages large-scale dynamic brain networks
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