EEG-fMRI study of the structural and functional organization of focused visual attention in healthy person

Yarets, М.Y.; Sharova, Е.V.; Zaitsev, O.S.; Smirnov, А.S.; Krotkova, О.А.; Kuptsova, S.V.

Авторы: Yarets М.Y., Sharova Е.V., Zaitsev O.S., Smirnov А.S., Krotkova О.А., Kuptsova S.V.
Журнал: International Journal of Psychophysiology
Том: 131
Год издания: 2018
Издательство: Elsevier BV
Местоположение издательства: Netherlands
Первая страница: 177
Последняя страница: 178
DOI: 10.1016/j.ijpsycho.2018.07.466
Аннотация: Focused attention (FA) is one of the main components of cognitive processes in normal and pathology [Navon, 1989; Coull 1998]. Сombination of EEG and neuroimaging allows to clarify already existing ideas [Luria, 2002; Machinskaya, 2003; Peterson, Posner, 2012] about structural and functional basis of FA in normal and pathology. Objective: to investigate topography of EEG and fMRI changes when the visual FA activated in healthy subjects, and to compare them with neuroanatomy of orienting and executive attention systems by Posner [Peterson, Posner, 2012]. EEG studies were performed in 24 healthy subjects (aged 21-30 years). In 4 of them fMRI 3T was carried out. A computer-based method with red ball moving across the screenwas was used to activate visual FA, with preliminary instruction to follow this object by eyes [Sharova et al., 2009]. EEG coherence indicators (CogEEG), as well as fMRI in FA test were statistically compared to state with simple opening eyes. According to fMRI, FA task was followed by activation of posterior brain’s regions, more in the left hemisphere: visual cortex (lingual gyrus, middle occipital gyrus and calcarine), fusiform gyrus, parietal area and cerebellum. The most activation volume was in lingual gyrus, linked with visual attention according to the literature [Mangun, 1998]. In general, fMRI responses topography was correlated with Posner’s frontoparietal attention system, but only with its parietal part, possibly because of task simplicity. Visual cortex activity is determined by the test specificity. FMRI response lateralization corresponds with CogEEG changes in the most frequency bands, except delta: CogEEG increase in left hemisphere. Involvement of anterior hemispheres is clearly seen in EEG: frontal interhemispheric coherent EEG connections (both symmetrical and diagonal) decrease in beta-1 band, that can be seen in context of cingulo-opercular Posner’s attention system activation. Intrahemispheric EEG reactions in the same frequency band correspond to frontoparietal Posner’s system, but reciprocally: FA CogEEG decrease (in comparison with open eyes) in frontal and parieto-occipital areas of the right hemisphere, and its increase in the same regions of the left. Bilateral occipital CogEEG changes in virtually all frequency bands can probably be regarded as a specific component of visual test. Thus, EEG-fMRI responses topography in visual FA test corresponds with frontoparietal and cingulo-opercular Posner’ s executive attention systems, and also include the occipital activation. Identified FA markers in healthy people can be used as basis in studies of cerebral pathology. Supported by RAS and RFFI #16-29-08 255 ofi-m
Добавил в систему: Зайцев Олег Семенович

	ИСТИНА	Войти в систему Регистрация
	ИПМех РАН
	Главная Поиск Статистика О проекте Помощь

ИСТИНА

ИПМех РАН

EEG-fMRI study of the structural and functional organization of focused visual attention in healthy personстатья Тезисы

Прикрепленные файлы