Time-course of motor inhibition during hypnotic paralysis: EEG topographical and source analysis
Cognitive hypotheses of hypnotic phenomena have proposed that executive attentional systems may be either inhibited or overactivated to produce a selective alteration or disconnection of some mental operations. Recent brain imaging studies have reported changes in activity in both medial (anterior c...
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2013
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00109452_v49_n2_p423_Cojan http://hdl.handle.net/20.500.12110/paper_00109452_v49_n2_p423_Cojan |
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paper:paper_00109452_v49_n2_p423_Cojan2023-06-08T14:34:44Z Time-course of motor inhibition during hypnotic paralysis: EEG topographical and source analysis EEG Hypnosis Inhibition Paralysis Topography adult anterior cingulate article brain region clinical article electroencephalography electrophysiology evoked response executive function female human hypnosis male motor performance normal human paralysis prefrontal cortex task performance topography Adult Analysis of Variance Brain Mapping Cues Data Interpretation, Statistical Electroencephalography Evoked Potentials Female Functional Laterality Humans Hypnosis Male Paralysis Prefrontal Cortex Psychomotor Performance Reproducibility of Results Young Adult Cognitive hypotheses of hypnotic phenomena have proposed that executive attentional systems may be either inhibited or overactivated to produce a selective alteration or disconnection of some mental operations. Recent brain imaging studies have reported changes in activity in both medial (anterior cingulate) and lateral (inferior) prefrontal areas during hypnotically induced paralysis, overlapping with areas associated with attentional control as well as inhibitory processes. To compare motor inhibition mechanisms responsible for paralysis during hypnosis and those recruited by voluntary inhibition, we used electroencephalography (EEG) to record brain activity during a modified bimanual Go-Nogo task, which was performed either in a normal baseline condition or during unilateral paralysis caused by hypnotic suggestion or by simulation (in two groups of participants, each tested once with both hands valid and once with unilateral paralysis). This paradigm allowed us to identify patterns of neural activity specifically associated with hypnotically induced paralysis, relative to voluntary inhibition during simulation or Nogo trials. We used a topographical EEG analysis technique to investigate both the spatial organization and the temporal sequence of neural processes activated in these different conditions, and to localize the underlying anatomical generators through minimum-norm methods. We found that preparatory activations were similar in all conditions, despite left hypnotic paralysis, indicating preserved motor intentions. A large P3-like activity was generated by voluntary inhibition during voluntary inhibition (Nogo), with neural sources in medial prefrontal areas, while hypnotic paralysis was associated with a distinctive topography activity during the same time-range and specific sources in right inferior frontal cortex. These results add support to the view that hypnosis might act by enhancing executive control systems mediated by right prefrontal areas, but does not produce paralysis via direct motor inhibition processes normally used for the voluntary suppression of actions. © 2012 Elsevier Ltd. 2013 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00109452_v49_n2_p423_Cojan http://hdl.handle.net/20.500.12110/paper_00109452_v49_n2_p423_Cojan |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
EEG Hypnosis Inhibition Paralysis Topography adult anterior cingulate article brain region clinical article electroencephalography electrophysiology evoked response executive function female human hypnosis male motor performance normal human paralysis prefrontal cortex task performance topography Adult Analysis of Variance Brain Mapping Cues Data Interpretation, Statistical Electroencephalography Evoked Potentials Female Functional Laterality Humans Hypnosis Male Paralysis Prefrontal Cortex Psychomotor Performance Reproducibility of Results Young Adult |
| spellingShingle |
EEG Hypnosis Inhibition Paralysis Topography adult anterior cingulate article brain region clinical article electroencephalography electrophysiology evoked response executive function female human hypnosis male motor performance normal human paralysis prefrontal cortex task performance topography Adult Analysis of Variance Brain Mapping Cues Data Interpretation, Statistical Electroencephalography Evoked Potentials Female Functional Laterality Humans Hypnosis Male Paralysis Prefrontal Cortex Psychomotor Performance Reproducibility of Results Young Adult Time-course of motor inhibition during hypnotic paralysis: EEG topographical and source analysis |
| topic_facet |
EEG Hypnosis Inhibition Paralysis Topography adult anterior cingulate article brain region clinical article electroencephalography electrophysiology evoked response executive function female human hypnosis male motor performance normal human paralysis prefrontal cortex task performance topography Adult Analysis of Variance Brain Mapping Cues Data Interpretation, Statistical Electroencephalography Evoked Potentials Female Functional Laterality Humans Hypnosis Male Paralysis Prefrontal Cortex Psychomotor Performance Reproducibility of Results Young Adult |
| description |
Cognitive hypotheses of hypnotic phenomena have proposed that executive attentional systems may be either inhibited or overactivated to produce a selective alteration or disconnection of some mental operations. Recent brain imaging studies have reported changes in activity in both medial (anterior cingulate) and lateral (inferior) prefrontal areas during hypnotically induced paralysis, overlapping with areas associated with attentional control as well as inhibitory processes. To compare motor inhibition mechanisms responsible for paralysis during hypnosis and those recruited by voluntary inhibition, we used electroencephalography (EEG) to record brain activity during a modified bimanual Go-Nogo task, which was performed either in a normal baseline condition or during unilateral paralysis caused by hypnotic suggestion or by simulation (in two groups of participants, each tested once with both hands valid and once with unilateral paralysis). This paradigm allowed us to identify patterns of neural activity specifically associated with hypnotically induced paralysis, relative to voluntary inhibition during simulation or Nogo trials. We used a topographical EEG analysis technique to investigate both the spatial organization and the temporal sequence of neural processes activated in these different conditions, and to localize the underlying anatomical generators through minimum-norm methods. We found that preparatory activations were similar in all conditions, despite left hypnotic paralysis, indicating preserved motor intentions. A large P3-like activity was generated by voluntary inhibition during voluntary inhibition (Nogo), with neural sources in medial prefrontal areas, while hypnotic paralysis was associated with a distinctive topography activity during the same time-range and specific sources in right inferior frontal cortex. These results add support to the view that hypnosis might act by enhancing executive control systems mediated by right prefrontal areas, but does not produce paralysis via direct motor inhibition processes normally used for the voluntary suppression of actions. © 2012 Elsevier Ltd. |
| title |
Time-course of motor inhibition during hypnotic paralysis: EEG topographical and source analysis |
| title_short |
Time-course of motor inhibition during hypnotic paralysis: EEG topographical and source analysis |
| title_full |
Time-course of motor inhibition during hypnotic paralysis: EEG topographical and source analysis |
| title_fullStr |
Time-course of motor inhibition during hypnotic paralysis: EEG topographical and source analysis |
| title_full_unstemmed |
Time-course of motor inhibition during hypnotic paralysis: EEG topographical and source analysis |
| title_sort |
time-course of motor inhibition during hypnotic paralysis: eeg topographical and source analysis |
| publishDate |
2013 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00109452_v49_n2_p423_Cojan http://hdl.handle.net/20.500.12110/paper_00109452_v49_n2_p423_Cojan |
| _version_ |
1768545584344465408 |