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Related Experiment Videos

Development of visual-evoked potentials to radially modulated concentric patterns.

Marie-Eve Doucet1, Frédéric Gosselin, Maryse Lassonde

  • 1University of Montreal, Montreal, Quebec, Canada.

Neuroreport
|October 21, 2005
PubMed
Summary

Visual processing of complex patterns matures by age 13. Event-related potentials reveal that while early visual responses (P1) mature early, later components (N1, P2) and their brain distribution develop into adolescence.

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Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Visual Cognition

Background:

  • The visual system undergoes significant development throughout childhood and adolescence.
  • Radially modulated concentric patterns activate key visual areas like the fusiform face area and V4 in adults.

Purpose of the Study:

  • To investigate the developmental trajectory of visual processing for radially modulated concentric patterns.
  • To determine the age at which visual event-related potentials (ERPs) related to these stimuli reach adult levels.

Main Methods:

  • Event-related potentials (ERPs) were recorded from human participants aged 3 to 22 years.
  • Participants viewed radially modulated concentric visual stimuli.
  • Analysis focused on the latency and scalp distribution of ERP components (P1, N1, P2).

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Main Results:

  • P1 latency matured early, reaching asymptote before age 3.
  • N1 and P2 latencies became adult-like by approximately 13 years of age.
  • The P2 component's scalp distribution shifted from focal to widespread by adolescence.

Conclusions:

  • Visual processing of complex concentric patterns shows prolonged maturation, extending into adolescence.
  • Key electrophysiological markers of visual processing, particularly N1, P2, and their distribution, are not fully mature until around 13 years of age.
  • These findings highlight the extended developmental period for higher-level visual cortical areas.