Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Positional adaptation reveals multiple chromatic mechanisms in human vision.

Paul V McGraw1, Declan J McKeefry, David Whitaker

  • 1Department of Optometry, University of Bradford, Richmond Road, Bradford, UK. P.V.McGraw@bradford.ac.uk

Journal of Vision
|August 28, 2004
PubMed
Summary

Chromatic processing in vision reorganizes earlier than thought. New research shows positional information is processed independently within color channels, revealing multiple mechanisms tuned to various color axes.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Prefilled insulin syringes for peri-operative care.

Anaesthesia·2026
Same author

The Effect of Contrast Reversal on Peripheral Visual Acuity.

Translational vision science & technology·2025
Same author

Measuring residual visual function after cerebral damage - a potential path for optimising rehabilitation approaches.

Progress in brain research·2025
Same author

Collective plasticity of binocular interactions in the adult visual system.

Scientific reports·2024
Same author

Eye movements in visual impairment.

Vision research·2023
Same author

The effects of simulated hemianopia on eye movements during text reading.

Vision research·2022

Area of Science:

  • Neuroscience
  • Visual Perception
  • Color Vision

Background:

  • Color vision relies on three independent opponent mechanisms (L/M, S/(L+M), L+M channels).
  • Evidence suggests chromatic processing reorganizes beyond this basic opponent model, forming higher-order mechanisms.
  • This reorganization is often thought to occur after binocular integration in the cortex.

Purpose of the Study:

  • To investigate the influence of chromatic adaptation on perceived visual location.
  • To explore the independence of positional information within color channels.
  • To determine if chromatic adaptation reveals multiple chromatically tuned mechanisms.

Main Methods:

  • Utilized a Vernier alignment task to assess perceived visual location.
  • Employed chromatic adaptation with stimuli extended to non-cardinal color axes.

Related Experiment Videos

  • Examined interocular transfer and decay rates of adaptation effects.

    • Main Results:

    • Positional information is processed independently within the L/M, S/(L+M), and L+M color channels.
    • Chromatic adaptation revealed multiple chromatically tuned mechanisms when using non-cardinal axes.
    • Adaptation effects showed minimal interocular transfer and rapid decay, characteristic of chromatic adaptation.

    Conclusions:

    • Chromatic processing reorganization may occur earlier in the visual pathway than previously assumed.
    • Findings challenge the notion that higher-order chromatic mechanisms only form after binocular integration.
    • Supports the existence of multiple, independently processed chromatically tuned mechanisms at earlier visual stages.