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Updated: Jul 17, 2026
07:45
Assessing Binocular Central Visual Field and Binocular Eye Movements in a Dichoptic Viewing Condition
Published on: July 21, 2020
Experience-dependent binocular competition in the visual cortex begins at eye opening
Spencer L Smith1, Joshua T Trachtenberg
1Department of Neurobiology, University of California at Los Angeles, 695 Charles Young Drive South, Los Angeles, California 90095-1761, USA.
Nature Neuroscience
|February 13, 2007
Summary
Early visual experience refines brain circuitry much sooner than previously believed. The quality of visual input, not just the amount, is crucial for developing receptive fields before the critical period.
Area of Science:
- Neuroscience
- Developmental Biology
- Visual System Plasticity
Background:
- Current models suggest cortical circuitry is resistant to experience-dependent modification until a later critical period.
- Visual experience begins at eye opening, but its early impact on plasticity is debated.
Purpose of the Study:
- To investigate the timing and mechanisms of experience-dependent receptive field refinement in the visual cortex.
- To determine if early visual experience influences plasticity before the established critical period.
Main Methods:
- Utilized optical imaging to map receptive field refinement in mice.
- Compared normal mice with those experiencing contralateral eye deprivation or silencing.
- Assessed the role of patterned visual experience through the ipsilateral eye.
Main Results:
- Contralateral eye deprivation retarded ipsilateral eye retinotopy refinement.
- Silencing the contralateral eye accelerated ipsilateral eye retinotopy refinement, requiring patterned ipsilateral input.
- These effects were prominent at postnatal day 15, preceding the critical period.
Conclusions:
- Experience-dependent binocular plasticity occurs much earlier than previously thought.
- The quality of visual activity (signal-to-noise ratio) is more critical than quantity for receptive field development.
- Early visual experience plays a significant role in shaping neural circuitry development.
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