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Monocular Visual Deprivation and Ocular Dominance Plasticity Measurement in the Mouse Primary Visual Cortex
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Vision and visual plasticity in ageing mice.

Konrad Lehmann1, Karl-Friedrich Schmidt, Siegrid Löwel

  • 1Institut für Allgemeine Zoologie und Tierphysiologie, Friedrich-Schiller-Universität Jena, Jena, Germany. Konrad.Lehmann@uni-jena.de

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Aging reduces visual acuity and cortical responses in mice, impacting their use as models for human vision loss. Some older mice retain youthful vision, suggesting variability in age-related decline.

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Area of Science:

  • Neuroscience
  • Ophthalmology
  • Gerontology

Background:

  • The aging visual system in mice, a key model for human visual disorders, has poorly understood neuronal changes.
  • Investigating age-related visual decline is crucial for understanding and treating human vision loss.

Purpose of the Study:

  • To investigate age-related changes in visual function and neuronal activity in mice.
  • To assess visual acuity, cortical responses, and interocular plasticity during aging.

Main Methods:

  • Optomotor response and visual water tasks were used to measure visual acuity in mice of different ages.
  • Optical imaging recorded visual cortical activity.
  • Monocular deprivation assessed interocular plasticity in young and aged mice.

Main Results:

  • Visual acuity declined with age, with significant decreases observed in both tested tasks.
  • Visual cortical activity decreased by 33% between 7 and 23 months.
  • Interocular plasticity showed a marked reduction in older mice, though some variability existed.

Conclusions:

  • Age-related vision loss in mice is associated with reduced visual cortical responses and interocular plasticity.
  • These findings indicate a central nervous system component contributing to vision decline in aging mice.
  • The observed interindividual variability highlights potential for targeted interventions.