EEG brain mapping of phonological and semantic tasks in Italian and German languages
EEG brain mapping of phonological and semantic tasks in Italian and German languages
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2000
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Clinical Neurophysiology ; 111 (2000). - pp. 706-716
Abstract
Objectives: Event-related potential correlates of phonological encoding ± as compared with lexical access and semantic categorization - were measured in two studies involving two groups of 14 German and 14 Italian subjects.
Methods: A two stimulus reaction time paradigm was used. Stimulus pairs presented one-by-one with 2 s inter-stimulus intervals (ISI) had to be matched with respect to lexical identity (word-picture) in a word comprehension task or with respect to the phonological representative of objects in a rhyming task. A semantic categorization task was added for the Italian sample. In both studies, the EEG was recorded from 26 scalp electrodes according to the 10±20 system. The slow negative potential during the ISI (CNV) was determined as the electrocortical correlate of preparation for and activation of the speci®c language-related task.
Results: In both samples, phonological encoding (rhyming) evoked a more pronounced CNV over the left- compared with the right-frontal area, while less lateralized central dominance of the CNV was found in the word comprehension task. Semantic categorization was accompanied by the least asymmetry of activity.
Conclusions: Results indicate that the different degree of asymmetry induced by phonological and semantic processing may be determined from the scalp distribution of slow cortical potentials with cross-lingual reliability.
Methods: A two stimulus reaction time paradigm was used. Stimulus pairs presented one-by-one with 2 s inter-stimulus intervals (ISI) had to be matched with respect to lexical identity (word-picture) in a word comprehension task or with respect to the phonological representative of objects in a rhyming task. A semantic categorization task was added for the Italian sample. In both studies, the EEG was recorded from 26 scalp electrodes according to the 10±20 system. The slow negative potential during the ISI (CNV) was determined as the electrocortical correlate of preparation for and activation of the speci®c language-related task.
Results: In both samples, phonological encoding (rhyming) evoked a more pronounced CNV over the left- compared with the right-frontal area, while less lateralized central dominance of the CNV was found in the word comprehension task. Semantic categorization was accompanied by the least asymmetry of activity.
Conclusions: Results indicate that the different degree of asymmetry induced by phonological and semantic processing may be determined from the scalp distribution of slow cortical potentials with cross-lingual reliability.
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150 Psychology
Keywords
Langsame kortikale Potenziale,Phonologische Kodierung,Semantische Verarbeitung,Lexikalischer Zugang,Sprache,Slow cortical potentials,Phonological encoding,Semantic processing,Lexical access,Language
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ANGRILLI, Alessandro, Christian DOBEL, Brigitte ROCKSTROH, Luciano STEGAGNO, Thomas ELBERT, 2000. EEG brain mapping of phonological and semantic tasks in Italian and German languages. In: Clinical Neurophysiology. 111, pp. 706-716. Available under: doi: 10.1016/S1388-2457(99)00308-9BibTex
@article{Angrilli2000brain-10158, year={2000}, doi={10.1016/S1388-2457(99)00308-9}, title={EEG brain mapping of phonological and semantic tasks in Italian and German languages}, volume={111}, journal={Clinical Neurophysiology}, pages={706--716}, author={Angrilli, Alessandro and Dobel, Christian and Rockstroh, Brigitte and Stegagno, Luciano and Elbert, Thomas} }
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