Trait and state mindfulness modulate EEG microstates
ABSTRACT The present study aimed to characterize microstate dynamics induced by non-reactive attention underlying mindfulness. Electroencephalogram signals from eighteen trained meditators and a matched non-meditators group were recorded before, during, and after a non-reactive attention meditation or during three resting periods respectively, while they were passively exposed to auditory stimulation. In a multimodal approach, microstate cluster decompositions, personality trait questionnaires, phenomenological ratings, and microstates sources localization were analyzed. Our results revealed that temporal parameters of microstates A and C at rest were negatively correlated to mindfulness traits across all participants. After meditation, the frequency of microstate A and C was decreased while microstate B was of longer duration, in meditators. Source localization analysis revealed that the non-reactive trait effect on microstate C at rest was explained by a modified activity of the salience network (identified by the anterior cingulate cortex, thalamus, and insula), while the non-reactive attentional state effect relied on a contribution of (anterior and posterior) cerebellum during meditation. Our results suggest that decreased microstates A and C reflect decreased mental state reactivity, while the increased microstate B relies on attention stability. These findings strongly encourage more research to assess the use of the microstate temporal parameters as a biomarker of the salience network activity, as well as objectify the brain changes induced by non-reactive attention training.HIGHLIGHT <jats:list list-type="bullet">The present study aimed to characterize microstate dynamics induced by non-reactive attention meditation, by the use of multimodal analysis including EEG microstate clusters decompositions, personality trait questionnaires, phenomenological reports, and source localization analysis.The occurrence of microstate A, recognized to be related to phonological processing and depressive disorders, was negatively correlated to mindfulness trait and was decreased after non-reactive attention meditation.The duration of microstate B, generally associated with the visual system, increases after meditation, in particular in meditators with a high non-reactivity trait.Temporal parameters of microstate C, recognized to be related to default mode, were negatively correlated to the non-reactivity trait of meditators and were decreased after non-reactive attention meditation. Source analysis revealed that these trait and state effects reflect modified activities of the salient network..
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Preprint| Erscheinungsjahr: |
2022 |
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| Erschienen: |
2022 |
| Enthalten in: |
bioRxiv.org - (2022) vom: 23. Mai Zur Gesamtaufnahme - year:2022 |
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| Sprache: |
Englisch |
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| Beteiligte Personen: |
Zarka, D. [VerfasserIn] |
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| Links: |
Volltext [kostenfrei] |
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| doi: |
10.1101/2021.11.22.21266675 |
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| PPN (Katalog-ID): |
XBI03308193X |
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| 520 | |a ABSTRACT The present study aimed to characterize microstate dynamics induced by non-reactive attention underlying mindfulness. Electroencephalogram signals from eighteen trained meditators and a matched non-meditators group were recorded before, during, and after a non-reactive attention meditation or during three resting periods respectively, while they were passively exposed to auditory stimulation. In a multimodal approach, microstate cluster decompositions, personality trait questionnaires, phenomenological ratings, and microstates sources localization were analyzed. Our results revealed that temporal parameters of microstates A and C at rest were negatively correlated to mindfulness traits across all participants. After meditation, the frequency of microstate A and C was decreased while microstate B was of longer duration, in meditators. Source localization analysis revealed that the non-reactive trait effect on microstate C at rest was explained by a modified activity of the salience network (identified by the anterior cingulate cortex, thalamus, and insula), while the non-reactive attentional state effect relied on a contribution of (anterior and posterior) cerebellum during meditation. Our results suggest that decreased microstates A and C reflect decreased mental state reactivity, while the increased microstate B relies on attention stability. These findings strongly encourage more research to assess the use of the microstate temporal parameters as a biomarker of the salience network activity, as well as objectify the brain changes induced by non-reactive attention training.HIGHLIGHT <jats:list list-type="bullet">The present study aimed to characterize microstate dynamics induced by non-reactive attention meditation, by the use of multimodal analysis including EEG microstate clusters decompositions, personality trait questionnaires, phenomenological reports, and source localization analysis.The occurrence of microstate A, recognized to be related to phonological processing and depressive disorders, was negatively correlated to mindfulness trait and was decreased after non-reactive attention meditation.The duration of microstate B, generally associated with the visual system, increases after meditation, in particular in meditators with a high non-reactivity trait.Temporal parameters of microstate C, recognized to be related to default mode, were negatively correlated to the non-reactivity trait of meditators and were decreased after non-reactive attention meditation. Source analysis revealed that these trait and state effects reflect modified activities of the salient network. | ||
| 700 | 1 | |a Cevallos, C. |e verfasserin |4 aut | |
| 700 | 1 | |a Ruiz, P. |e verfasserin |4 aut | |
| 700 | 1 | |a Cebolla, A. M. |e verfasserin |4 aut | |
| 700 | 1 | |a Petieau, M. |e verfasserin |4 aut | |
| 700 | 1 | |a Bengoetxea, A. |e verfasserin |4 aut | |
| 700 | 1 | |a Cheron, G. |e verfasserin |4 aut | |
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