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Related Experiment Videos

Influence of experience on orientation maps in cat visual cortex.

F Sengpiel1, P Stawinski, T Bonhoeffer

  • 1Max-Planck-Institut für Neurobiologie, Am Klopferspitz 18a, 82152 München-Martinsried, Germany. franks@neuro.mpg.de

Nature Neuroscience
|July 21, 1999
PubMed
Summary
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Visual experience shapes the brain

Area of Science:

  • Neuroscience
  • Developmental Neuroscience
  • Visual System Development

Background:

  • Experience influences ocular dominance maps in the visual cortex.
  • The impact of early visual experience on orientation preference maps remains debated.
  • Understanding how visual input shapes cortical maps is crucial for developmental neuroscience.

Purpose of the Study:

  • To investigate if early visual experience, limited to a single orientation, affects orientation preference maps in the kitten visual cortex.
  • To determine the role of visual experience in modifying neuronal orientation preferences.
  • To explore the plasticity of orientation maps in response to visual input.

Main Methods:

  • Utilized optical imaging based on intrinsic signals in kittens.

Related Experiment Videos

  • Kittens were reared in an environment with visual stimuli of a single orientation.
  • Recorded cortical responses to visual stimuli of various orientations.

    • Main Results:

    • The visual cortex responded to all orientations, not just the experienced one.
    • Cortical areas responding to the experienced orientation were up to twice as large as those responding to the orthogonal orientation.
    • Neuronal orientation preferences shifted towards the experienced orientation, indicating an instructive role of experience.

    Conclusions:

    • Visual experience can alter neuronal orientation preferences and expand cortical territory for experienced orientations.
    • Cortical orientation maps exhibit plasticity, adapting to early visual input.
    • Despite map rigidity, visual experience actively shapes neuronal responses to oriented contours.