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Area of Science:

  • Developmental Neuroscience
  • Cognitive Neuroscience
  • Infant Brain Development

Background:

  • The A-not-B task is a classic test of object permanence and cognitive development in infants.
  • Spatial tasks are thought to rely on working memory and inhibitory control, functions associated with the frontal lobes.
  • Understanding brain activity during these tasks can reveal insights into early cognitive development.

Purpose of the Study:

  • To investigate individual differences in brain electrical activity (EEG) during a visual A-not-B task in infants.
  • To explore the relationship between EEG patterns, cognitive performance, and frontal lobe function in 8-month-old infants.
  • To determine if specific EEG markers differentiate high and low performers on a spatial task.

Main Methods:

  • Recorded electroencephalograms (EEGs) from 54 eight-month-old infants during a baseline period and a looking version of the A-not-B task.
  • Analyzed EEG power in the 6- to 9-Hz frequency band and EEG coherence between different scalp locations.
  • Compared EEG data between infants classified as high and low performers on the spatial task.

Main Results:

  • High-performing infants showed increased 6- to 9-Hz EEG power from baseline to task at frontal and posterior sites.
  • High performers exhibited lower right hemisphere frontal EEG coherence during both baseline and task compared to low performers.
  • All infants displayed increased frontal-parietal coherence during the task, suggesting engagement of spatial working memory networks.

Conclusions:

  • Brain electrical activity, particularly frontal lobe function, differs between infants with varying levels of performance on spatial tasks.
  • Specific EEG patterns, including frontal power and coherence, are associated with cognitive abilities in infancy.
  • These findings support the link between frontal lobe activity and cognitive performance during early development.