A model for visual naming based on spatiotemporal dynamics of ECoG high-gamma modulation
Copyright © 2019 Elsevier Inc. All rights reserved..
OBJECTIVE: We studied spatiotemporal dynamics of electrocorticographic (ECoG) high-gamma modulation (HGM) during visual naming.
METHODS: In 8 patients, aged 4-19 years, with left hemisphere subdural electrodes, propagation of ECoG HGM during overt visual naming was mapped with trial-averaged time-frequency analysis. Group-level synthesis was performed by transforming all electrodes to a standard space and assigning cortical parcels based on a reference atlas.
RESULTS: After image display following cortical parcels were activated: inferior occipital, caudal angular, fusiform, and middle temporal gyri, and superior temporal sulcus [0-400 ms]; rostral pars triangularis (A45r), inferior frontal sulcus, caudal dorsolateral premotor cortex (A6cdl) [300-600 ms]; caudal ventrolateral premotor cortex (A6cvl), caudal pars triangularis (A45c), pars opercularis (A44) [400-800 ms]; primary sensorimotor cortex [600-1400 ms], with most prominent HGM in glossolaryngeal region (A4tl). Lastly, auditory cortex (A41/A42) and superior temporal gyrus (A22) were activated [900 ms-1.4 s]. After 1.5 s, HGM decreased globally, except in ventrolateral premotor cortex.
CONCLUSIONS: During visual naming, ECoG HGM shows a sequential but overlapping spatiotemporal course through cortical regions. We provide neurophysiologic validation for a model of visual naming incorporating both modular and distributed cortical processing. This may explain cognitive deficits seen in some patients after surgery involving HGM naming sites outside perisylvian language cortex.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2019 |
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| Erschienen: |
2019 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:99 |
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| Enthalten in: |
Epilepsy & behavior : E&B - 99(2019) vom: 27. Okt., Seite 106455 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Arya, Ravindra [VerfasserIn] |
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| Links: |
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| Themen: |
Epilepsy surgery |
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| Anmerkungen: |
Date Completed 20.07.2020 Date Revised 20.07.2020 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1016/j.yebeh.2019.106455 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM300298862 |
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| 100 | 1 | |a Arya, Ravindra |e verfasserin |4 aut | |
| 245 | 1 | 2 | |a A model for visual naming based on spatiotemporal dynamics of ECoG high-gamma modulation |
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| 500 | |a Date Revised 20.07.2020 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a Copyright © 2019 Elsevier Inc. All rights reserved. | ||
| 520 | |a OBJECTIVE: We studied spatiotemporal dynamics of electrocorticographic (ECoG) high-gamma modulation (HGM) during visual naming | ||
| 520 | |a METHODS: In 8 patients, aged 4-19 years, with left hemisphere subdural electrodes, propagation of ECoG HGM during overt visual naming was mapped with trial-averaged time-frequency analysis. Group-level synthesis was performed by transforming all electrodes to a standard space and assigning cortical parcels based on a reference atlas | ||
| 520 | |a RESULTS: After image display following cortical parcels were activated: inferior occipital, caudal angular, fusiform, and middle temporal gyri, and superior temporal sulcus [0-400 ms]; rostral pars triangularis (A45r), inferior frontal sulcus, caudal dorsolateral premotor cortex (A6cdl) [300-600 ms]; caudal ventrolateral premotor cortex (A6cvl), caudal pars triangularis (A45c), pars opercularis (A44) [400-800 ms]; primary sensorimotor cortex [600-1400 ms], with most prominent HGM in glossolaryngeal region (A4tl). Lastly, auditory cortex (A41/A42) and superior temporal gyrus (A22) were activated [900 ms-1.4 s]. After 1.5 s, HGM decreased globally, except in ventrolateral premotor cortex | ||
| 520 | |a CONCLUSIONS: During visual naming, ECoG HGM shows a sequential but overlapping spatiotemporal course through cortical regions. We provide neurophysiologic validation for a model of visual naming incorporating both modular and distributed cortical processing. This may explain cognitive deficits seen in some patients after surgery involving HGM naming sites outside perisylvian language cortex | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, Non-U.S. Gov't | |
| 650 | 4 | |a Epilepsy surgery | |
| 650 | 4 | |a Human brain mapping | |
| 650 | 4 | |a Neuropsychological deficits | |
| 650 | 4 | |a Presurgical language mapping | |
| 700 | 1 | |a Babajani-Feremi, Abbas |e verfasserin |4 aut | |
| 700 | 1 | |a Byars, Anna W |e verfasserin |4 aut | |
| 700 | 1 | |a Vannest, Jennifer |e verfasserin |4 aut | |
| 700 | 1 | |a Greiner, Hansel M |e verfasserin |4 aut | |
| 700 | 1 | |a Wheless, James W |e verfasserin |4 aut | |
| 700 | 1 | |a Mangano, Francesco T |e verfasserin |4 aut | |
| 700 | 1 | |a Holland, Katherine D |e verfasserin |4 aut | |
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