Cookies on this website
We use cookies to ensure that we give you the best experience on our website. If you click 'Continue' we'll assume that you are happy to receive all cookies and you won't see this message again. Click 'Find out more' for information on how to change your cookie settings.

<p>Motion sensitivity increases during childhood, but little is known about the underlying neural correlates. Most studies investigating children’s evoked responses have not dissociated direction-specific and non-direction-specific responses. To isolate direction-specific responses, we presented coherently moving dot stimuli preceded by a period of incoherent motion, to 6- to 7-year-olds (n = 34), 8- to 10-year-olds (n = 34), 10- to 12-year-olds (n = 34) and adults (n = 20). Participants reported the direction of coherent motion while high-density EEG was recorded. Using a data-driven approach, we identified two stimulus-locked EEG components with distinct topographies: an early component with an occipital topography and a later, sustained positive component over centro-parietal electrodes. The component waveforms showed clear age-related differences, and scaled with motion coherence. In the early, occipital component, all groups showed a negativity peaking at ~300ms, like the previously reported coherent-motion N2. However, the children, unlike adults, showed an additional positive peak at ~200ms. The later positive response in the centro-parietal component rose more steeply for adults than for the youngest children, likely reflecting age-related changes in decision-making. These results suggest that children’s protracted development of coherent motion sensitivity is associated with gradual maturation of both early sensory and later decision-related processes.</p>

Original publication

DOI

10.1016/j.dcn.2019.100670

Type

Journal article

Journal

Developmental Cognitive Neuroscience

Publisher

Elsevier

Publication Date

13/06/2019