Journal
FRONTIERS IN PSYCHOLOGY
Volume 9, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fpsyg.2018.01106
Keywords
selective attention; visuo-spatial attention; object tracking; development; functional magnetic resonance imaging (fMRI)
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Funding
- Initiative for the Development of Scientific and Economic Excellence of the state of Hessen (LOEWE
- IDeA-Center)
- Emmy Noether grant from the German Research Foundation [DFG FI848/3-1]
- Consolidator grant from the European Research Council (ERC) [617891]
- European Research Council (ERC) [617891] Funding Source: European Research Council (ERC)
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Our ability to select relevant information from the environment is limited by the resolution of attention - i.e., the minimum size of the region that can be selected. Neural mechanisms that underlie this limit and its development are not yet understood. Functional magnetic resonance imaging (fMRI) was performed during an object tracking task in 7- and 11-year-old children, and in young adults. Object tracking activated canonical fronto-parietal attention systems and motion-sensitive area MT in children as young as 7 years. Object tracking performance improved with age, together with stronger recruitment of parietal attention areas and a shift from low-level to higher-level visual areas. Increasing the required resolution of spatial attention - which was implemented by varying the distance between target and distractors in the object tracking task - led to activation increases in fronto-insular cortex, medial frontal cortex including anterior cingulate cortex (ACC) and supplementary motor area, superior colliculi, and thalamus. This core circuitry for attentional precision was recruited by all age groups, but ACC showed an age-related activation reduction. Our results suggest that age-related improvements in selective visual attention and in the resolution of attention are characterized by an increased use of more functionally specialized brain regions during the course of development.
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