Spectrotemporal cortical dynamics and semantic control during sentence completion
Uloženo v:
| Název: | Spectrotemporal cortical dynamics and semantic control during sentence completion |
|---|---|
| Autoři: | Tim Coolen, Alexandru Mihai Dumitrescu, Vincent Wens, Mathieu Bourguignon, Antonin Rovai, Niloufar Sadeghi, Charline Urbain, Serge Goldman, Xavier De Tiège |
| Zdroj: | Clinical Neurophysiology. 163:90-101 |
| Informace o vydavateli: | Elsevier BV, 2024. |
| Rok vydání: | 2024 |
| Témata: | 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 |
| Popis: | 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. |
| Druh dokumentu: | Article |
| Popis souboru: | 2 full-text file(s): application/pdf; application/pdf |
| Jazyk: | English |
| ISSN: | 1388-2457 |
| DOI: | 10.1016/j.clinph.2024.04.012 |
| Přístupová URL adresa: | https://pubmed.ncbi.nlm.nih.gov/38714152 |
| Rights: | Elsevier TDM |
| Přístupové číslo: | edsair.doi.dedup.....48167eb4431047752d76b45d98f3091c |
| Databáze: | OpenAIRE |
Full Text Finder 
Nájsť tento článok vo Web of Science Buďte první, kdo okomentuje tento záznam!