March 2012
Volume 53, Issue 14
Free
ARVO Annual Meeting Abstract  |   March 2012
Visual Development Of Contrast, Orientation, and Motion Processing
Author Affiliations & Notes
  • Jin Lee
    Experimental Psychology, University of Oxford, Oxford, United Kingdom
  • John Wattam-Bell
    Department of Psychology, University College London, London, United Kingdom
  • Janette Atkinson
    Department of Psychology, University College London, London, United Kingdom
  • Oliver Braddick
    Experimental Psychology, University of Oxford, Oxford, United Kingdom
  • Footnotes
    Commercial Relationships  Jin Lee, None; John Wattam-Bell, None; Janette Atkinson, None; Oliver Braddick, None
  • Footnotes
    Support  supported by MRC grant G0601007, an award from the Leverhulme Foundation to OB, and a Thouron Fellowship to JL.
Investigative Ophthalmology & Visual Science March 2012, Vol.53, 4140. doi:https://doi.org/
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    • Get Citation

      Jin Lee, John Wattam-Bell, Janette Atkinson, Oliver Braddick; Visual Development Of Contrast, Orientation, and Motion Processing. Invest. Ophthalmol. Vis. Sci. 2012;53(14):4140. doi: https://doi.org/.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract
 
Purpose:
 

VEP peak latency has found to be a better indicator of visual development than amplitude (Sokol and Jones, 1979; Tello et al, 2010). In this study, two latencies were measured in phase, orientation, and direction VEPs.

 
Methods:
 

The three visual stimuli were tested in 61 adults at 1- 16 r/s and 136 infants (age 7-79 weeks) at 2-8 r/s. In addition to measuring its peak transient latencies at 1-3 r/s, apparent latencies from the gradient of phase against reversal rates were also calculated in steady-state recording at 1- 16 r/s.

 
Results:
 

For the transient peak latencies, infants showed similar orientation and direction responses while adults had similar phase and orientation latencies. Both adults and infants had similar orientation and direction calculated latencies that are significantly longer than their respective peak latencies. While the transient latencies of the three stimuli merged at around 20 weeks, the calculated latencies of orientation and direction merged at about 30 weeks of age.

 
Conclusions:
 

The transient peak latencies of phase, orientation, and direction VEPs showed similar developmental trends. Phased based calculated latency, however, reflected different timing of cortical feedback loops. Their implications will be further explored.  

 

 
Keywords: electrophysiology: non-clinical • visual development: infancy and childhood • visual development 
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