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Updated: May 17, 2025
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Monocular Visual Deprivation and Ocular Dominance Plasticity Measurement in the Mouse Primary Visual Cortex
Published on: February 8, 2020
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Premature vision drives aberrant development of response properties in primary visual cortex
Sophie V Griswold1,2, Stephen D Van Hooser1,2,3
1Department of Biology.
Biorxiv : the Preprint Server for Biology
|March 31, 2025
Summary
Prematurely opening ferret eyes altered visual processing, increasing spontaneous activity and enhancing temporal tuning. This suggests early visual experience significantly impacts neural circuit development.
Area of Science:
- Neuroscience
- Developmental Biology
- Visual System Research
Background:
- Mammalian visual system development occurs in two stages: experience-independent circuit formation and experience-dependent refinement.
- Spontaneous neural activity shapes early visual circuits before sensory experience.
- Sensory experience refines receptive fields during a critical period.
Purpose of the Study:
- To investigate the effects of premature visual experience on ferret visual receptive fields.
- To examine how altering the typical sequence of visual development impacts neural circuits.
- To understand the role of lid closure in normal visual system maturation.
Main Methods:
- Ferret models with prematurely opened eyes (one or both) were used.
- Visual receptive fields in the monocular cortex were analyzed post-critical period.
- Spontaneous neural activity levels were measured in both hemispheres.
Main Results:
- Cells in prematurely-eyed ferrets showed low-pass temporal frequency tuning and wider temporal bandwidths.
- Orientation and direction selectivity were slightly enhanced.
- Spontaneous activity significantly increased globally, not just in the visually experienced hemisphere.
- Spatial frequency tuning remained largely unchanged.
Conclusions:
- Premature visual experience alters neural circuit excitability and receptive field properties, particularly temporal processing.
- Early visual input can globally affect brain excitability.
- Lid closure in altricial mammals may be crucial for preventing premature visual input until circuits are ready for refinement.
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