Neural correlates of saccade planning in infants: A high-density ERP study

Gergely Csibra, Leslie A. Tucker, Mark H. Johnson

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Abstract

Neural correlates of saccade planning in 6-month-old infants were investigated by high-density event-related potentials. Subjects made saccades to a target stimulus following a time gap from fixation stimulus offset (gap trials) or with the fixation stimulus still present (overlap trials). Like adults, infants were slower to make a saccade to the target when the fixation stimulus was still present. Strikingly, infants did not show clear evidence of the pre-saccadic components observed in adults which are thought to reflect cortical saccade planning processes. They did, however, show a left frontal positivity, which we suggest reflects cortical disinhibition of the colliculus initiated by fixation stimulus offset, and clear post-saccadic lambda waves. These results indicate that the frontal cortex already plays a role in action control by 6 months of age, while other aspects of cortical action planning may not yet be present in certain task situations.

Original languageEnglish
Pages (from-to)201-215
Number of pages15
JournalInternational Journal of Psychophysiology
Volume29
Issue number2
DOIs
Publication statusPublished - Jul 1 1998

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Keywords

  • Gap effect
  • High-density ERPs
  • Infants
  • Pre-saccadic potentials
  • Saccade planning

ASJC Scopus subject areas

  • Neuroscience(all)
  • Neuropsychology and Physiological Psychology
  • Physiology (medical)

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