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Related Concept Videos

Brain Imaging01:14

Brain Imaging

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Brain imaging technologies provide critical insights into both the structure and function of the human brain, enabling medical professionals and researchers to diagnose, study, and treat neurological disorders or psychiatric disorders more effectively.
These technologies include computerized axial tomography (CAT or CT scans), positron-emission tomography (PET scans),  magnetic resonance imaging (MRI),  functional magnetic resonance imaging (fMRI), and Transcranial Magnetic...
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The Relation between Infant Covert Orienting, Sustained Attention and Brain Activity.

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  • 1Department of Psychology, and Institute for Mind and Brain, University of South Carolina, Columbia, SC, 29208, USA. xiew@mailbox.sc.edu.

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Infant brain activity reveals that covert orienting mechanisms are present by 3-4.5 months. Sustained attention enhances these neural responses, suggesting early development of spatial attention skills.

Keywords:
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Area of Science:

  • Developmental neuroscience
  • Cognitive neuroscience
  • Infant brain development

Background:

  • Early visual attention is crucial for cognitive development.
  • Understanding the neural basis of attention in infants is key to identifying developmental trajectories.

Purpose of the Study:

  • To investigate the neural mechanisms of covert orienting and sustained attention in 3- to 4.5-month-old infants.
  • To examine how sustained attention modulates brain responses during spatial cueing.

Main Methods:

  • Event-related potentials (ERPs) and cortical source analysis were used in a spatial cueing paradigm.
  • Realistic infant MRI-based head models were employed for current density reconstruction.
  • Stimulus onset asynchrony (SOA) was manipulated to assess validity and processing cost effects.

Main Results:

  • A validity effect was observed in the P1 ERP component for valid vs. neutral trials at short SOAs.
  • Cortical source analysis showed enhanced P1 activity in occipital and temporal regions for valid trials.
  • A processing cost effect was evident in the N1 ERP component for neutral vs. invalid trials.
  • Sustained attention enhanced P1 ERP responses and cortical source activity.

Conclusions:

  • Neural mechanisms for covert orienting are present in infants as young as 3-4.5 months.
  • Infant sustained attention plays a facilitating role in modulating covert orienting brain responses.
  • These findings provide insights into the early development of spatial attention networks.