The role of brain function lateralization in a cognitive control task with conflict-induced conditionsстатьяТезисы
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 16 февраля 2016 г.
Аннотация:The present study investigates brain activity related to cognitive control (specifically, cognitive inhibition). 30 people (18–35 years old) participated in ‘stop-signal-task’. Stimuli consisted of vowel and consonant letters in green or red. Subjects had to distinguish between green vowels and consonants, red letters had to be ignored. ERPs (21 channels, monopolar) were registered for a ‘green’ and a ‘red’ stimulus. ERPs were presented as equivalent dipole sources (2-dipole model, reliability coefficient > 0.95). The amount of dipoles in each brain structure (Talairach Atlas) was calculated for 0–500 ms post stimulus. There were significant differences (t-test, p < 0.05) in following brain structures: left BA 20 (50–100 ms), right BA 9 (150 ms), left middle frontal gyrus (150 ms), left inferior temporal gyrus (150 ms), left BA 19 (200 ms), left BA 30 (250 ms), left subcallosal gyrus (300 ms), right medial frontal gyrus (300 ms), right inferior parietal lobule (350 ms), right BA 30 (350 ms). These areas of the brain are involved in the executive functions such as working memory, cognitive flexibility, planning, and inhibition. It is shown that the areas of the left hemisphere are activated mainly in the early time periods, while the areas of the right hemisphere showed more responses later. We noted the simultaneous activation of the left subcallosal gyrus and the right medial frontal gyrus. Decision-making during the inhibition of involuntary reactions is supported by the occurrence of positive motivation which is based on the activation of the left subcallosal gyrus.