| Title |
Cortical dynamics of visuospatial processing investigated by EEG microstates method / |
| Translation of Title |
Su regimuoju erdvės suvokimu susijusio smegenų aktyvumo dinamikos tyrimas EEG mikrobūsenų metodu. |
| Authors |
Antonova, Ingrida |
| Full Text |
|
| Pages |
110 |
| Keywords [eng] |
EEG ; microstate analysis ; visuospatial processing ; temporal dynamics |
| Abstract [eng] |
Visuospatial processing is important for normal perception of the environment and normal functioning in the surrounding environment. Brain areas involvement in visuospatial processing is well known but the order of activation of these areas – temporal dynamics of visuospatial processing – is not known yet. The aim of this work was to investigate temporal dynamics of visuospatial information processing by electroencephalography (EEG) microstate analysis. Two experiments were carried out: 22 healthy subjects participated in visuospatial and non-spatial judgment experiment; 28 healthy subjects participated in position judgment experiment with lateralized visual stimulation. Reaction times were longer: in visuospatial judgment compared to non-spatial judgment; for left than right visual field stimulation; when stimulated medial compared to lateral portions of the both visual fields. Microstate analysis revealed that visuospatial judgment evoked longer and stronger P1-related activity. P3-related activity differed in onset, duration and activation between visuospatial and non-spatial judgment. Also, lateralized stimulation evokes lateralized activation related to N1 potential, and this activation is stronger for right medial stimulation. Visuospatial and non-spatial judgment task and position judgment task are suitable to be used in EEG studies and could be used in developing screening procedures for visuospatial impairment. |
| Dissertation Institution |
Vilniaus universitetas. |
| Type |
Doctoral thesis |
| Language |
English |
| Publication date |
2016 |
