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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Dionisie, B. Costin, H. Cojocaru, E. Dionisie, C. |
| Copyright Year | 2015 |
| Description | Author affiliation: Dept. of Biomed. Sci., Grigore T. Popa Univ. of Med. & Pharmacy, Iasi, Romania (Costin, H.) || Dept. of Physiol., Grigore T. Popa Univ. of Med. & Pharmacy, Iasi, Romania (Dionisie, B.; Cojocaru, E.) |
| Abstract | The experiments used a patented psycho-verbal stimulation interface to study the origin of cognitive visual N400 evoked potential onset in reading process. The acquisition was performed in Oz, Pz, Cz, Fz leads, on a group of 50 normal persons, in two experiments. First experiment aims to probe the automatic origin of N400 by delivered each 500 words-lists at short asynchronic stimulation 200 ms and long asynchronic stimulation 1000 ms in a letter recognition task. Second experiment proposes to test the role of words expectancy in N400 onset by a letter recognition task at words semantic selected. Grand AVG function was used on each experiment for the average-group recordings at each task and statistic SPSS software based on ANOVA method was used to compare the differences in amplitude of N400. We observed overlapping traces for both acquisitions: at short asynchronic stimulation 200 ms and long asynchronic stimulation 1000 ms. Between the two tracks there is no difference amplitude and N400 wave is present. N400 elicited at unexpected words-list a prove to be a pronounced negativity between 350-450 ms and expected stimuli has produced no N400 effect, but a slight positivity between 350-500. |
| Starting Page | 1 |
| Ending Page | 4 |
| File Size | 508655 |
| Page Count | 4 |
| File Format | |
| ISBN | 9781467375443 |
| e-ISBN | 9781467375450 |
| DOI | 10.1109/EHB.2015.7391532 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2015-11-19 |
| Publisher Place | Romania |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Visualization Technological innovation N400 Patented stimulation interface Semantics Cogntive visual evoked potentials VEPs Software Decoding Lexical decision task Asynchronic stimulation Analysis of variance |
| Content Type | Text |
| Resource Type | Article |
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