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Related Concept Videos

Vision01:24

Vision

Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.

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Altered visual experience induces instructive changes of orientation preference in mouse visual cortex.

Anne K Kreile1, Tobias Bonhoeffer, Mark Hübener

  • 1Department of Cellular and Systems Neurobiology, Max Planck Institute of Neurobiology, 82152 Martinsried, Germany.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|September 30, 2011
PubMed
Summary
This summary is machine-generated.

Stripe rearing alters visual cortex neuron tuning. This study reveals that while some neurons become unresponsive, others in lower cortical layers change their orientation preference, demonstrating an instructive mechanism for visual development.

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Visual System Research

Background:

  • Stripe rearing, restricting visual input to one orientation, causes overrepresentation of that orientation in the visual cortex.
  • The precise mechanisms driving this cortical plasticity remain unclear, with debate on whether neuronal silencing or altered tuning is responsible.

Purpose of the Study:

  • To investigate the cellular mechanisms underlying orientation preference changes in the visual cortex after stripe rearing.
  • To differentiate between neuronal silencing and orientation tuning shifts as causes of cortical plasticity.

Main Methods:

  • Juvenile mice were stripe-reared using cylinder lens goggles for three weeks.
  • Two-photon calcium imaging was employed to assess the orientation preference of all cortical neurons, including non-responsive ones.
  • Analysis focused on changes in neuronal responsiveness and preferred orientation across different cortical depths.

Main Results:

  • Stripe rearing led to a significant overrepresentation of the experienced orientation in cortical layer 2/3.
  • Neuronal responsiveness decreased in the upper layer 2/3, while remaining largely unchanged in the deeper layer.
  • The overrepresentation of the experienced orientation was most pronounced in the lower layer 2/3.

Conclusions:

  • The stripe rearing effect results from diverse mechanisms contributing to cortical plasticity.
  • In lower layer 2/3, plasticity is mediated by an instructive mechanism that actively alters individual neuron orientation tuning.
  • These findings provide crucial insights into how early visual experience shapes neural circuits.