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Spectrotemporal cortical dynamics and semantic control during sentence completion

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Titel: Spectrotemporal cortical dynamics and semantic control during sentence completion
Autoren: Tim Coolen, Alexandru Mihai Dumitrescu, Vincent Wens, Mathieu Bourguignon, Antonin Rovai, Niloufar Sadeghi, Charline Urbain, Serge Goldman, Xavier De Tiège
Quelle: Clinical Neurophysiology. 163:90-101
Verlagsinformationen: Elsevier BV, 2024.
Publikationsjahr: 2024
Schlagwörter: Male, Adult, Cerebral Cortex, Semantic Control, Magnetoencephalography -- methods, Magnetoencephalography, Sciences bio-médicales et agricoles, Semantics, Young Adult, Cerebral Cortex -- physiology, Language Mapping, Brain Oscillations, Sentence Completion, Humans, Female
Beschreibung: To investigate cortical oscillations during a sentence completion task (SC) using magnetoencephalography (MEG), focusing on the semantic control network (SCN), its leftward asymmetry, and the effects of semantic control load.Twenty right-handed adults underwent MEG while performing SC, consisting of low cloze (LC: multiple responses) and high cloze (HC: single response) stimuli. Spectrotemporal power modulations as event-related synchronizations (ERS) and desynchronizations (ERD) were analyzed: first, at the whole-brain level; second, in key SCN regions, posterior middle/inferior temporal gyri (pMTG/ITG) and inferior frontal gyri (IFG), under different semantic control loads.Three cortical response patterns emerged: early (0-200 ms) theta-band occipital ERS; intermediate (200-700 ms) semantic network alpha/beta-band ERD; late (700-3000 ms) dorsal language stream alpha/beta/gamma-band ERD. Under high semantic control load (LC), pMTG/ITG showed prolonged left-sided engagement (ERD) and right-sided inhibition (ERS). Left IFG exhibited heightened late (2500-2550 ms) beta-band ERD with increased semantic control load (LC vs. HC).SC involves distinct cortical responses and depends on the left IFG and asymmetric engagement of the pMTG/ITG for semantic control.Future use of SC in neuromagnetic preoperative language mapping and for understanding the pathophysiology of language disorders in neurological conditions.
Publikationsart: Article
Dateibeschreibung: 2 full-text file(s): application/pdf; application/pdf
Sprache: English
ISSN: 1388-2457
DOI: 10.1016/j.clinph.2024.04.012
Zugangs-URL: https://pubmed.ncbi.nlm.nih.gov/38714152
Rights: Elsevier TDM
Dokumentencode: edsair.doi.dedup.....48167eb4431047752d76b45d98f3091c
Datenbank: OpenAIRE
Beschreibung
Abstract:To investigate cortical oscillations during a sentence completion task (SC) using magnetoencephalography (MEG), focusing on the semantic control network (SCN), its leftward asymmetry, and the effects of semantic control load.Twenty right-handed adults underwent MEG while performing SC, consisting of low cloze (LC: multiple responses) and high cloze (HC: single response) stimuli. Spectrotemporal power modulations as event-related synchronizations (ERS) and desynchronizations (ERD) were analyzed: first, at the whole-brain level; second, in key SCN regions, posterior middle/inferior temporal gyri (pMTG/ITG) and inferior frontal gyri (IFG), under different semantic control loads.Three cortical response patterns emerged: early (0-200 ms) theta-band occipital ERS; intermediate (200-700 ms) semantic network alpha/beta-band ERD; late (700-3000 ms) dorsal language stream alpha/beta/gamma-band ERD. Under high semantic control load (LC), pMTG/ITG showed prolonged left-sided engagement (ERD) and right-sided inhibition (ERS). Left IFG exhibited heightened late (2500-2550 ms) beta-band ERD with increased semantic control load (LC vs. HC).SC involves distinct cortical responses and depends on the left IFG and asymmetric engagement of the pMTG/ITG for semantic control.Future use of SC in neuromagnetic preoperative language mapping and for understanding the pathophysiology of language disorders in neurological conditions.
ISSN:13882457
DOI:10.1016/j.clinph.2024.04.012