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Visual map shifts based on whisker-guided cues in the young mouse visual cortex.

Kohei Yoshitake1, Hiroaki Tsukano2, Manavu Tohmi2

  • 1Department of Neurophysiology, Brain Research Institute, Niigata University, 1-757 Asahi-machi, Chuo-ku, Niigata 951-8585, Japan; Japan Science and Technology Agency, CREST, 7 Goban-cho, Chiyoda-ku, Tokyo 102-0076, Japan.

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|December 10, 2013
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Summary

Young mice adapt to visual input changes using whiskers and the posterior parietal cortex. Monocular prism wear caused visual cortex depression, which whisker trimming or parietal cortex lesions reversed, revealing sensory integration mechanisms.

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Area of Science:

  • Neuroscience
  • Sensory Integration
  • Perception

Background:

  • Mice utilize vision and whiskers for spatial navigation.
  • Young mice integrate multisensory information for perceptual development.
  • Understanding sensory integration is crucial for neuroscience.

Purpose of the Study:

  • To investigate how young mice integrate visual and whisker sensory inputs.
  • To examine the effects of altered visual input on the primary visual cortex.
  • To explore the role of the posterior parietal cortex in sensory map plasticity.

Main Methods:

  • Monocular prism adaptation in young mice.
  • Electrophysiological recording of cortical responses.
  • Whisker trimming and posterior parietal cortex lesioning.

Main Results:

  • Monocular prism wear induced uniform depression in the primary visual cortex.
  • Whisker trimming or posterior parietal cortex lesions abolished this depression.
  • Compensatory visual map shifts occurred, separating responses from each eye.
  • Map shifts were linked to depression with spatial eccentricity.

Conclusions:

  • The posterior parietal cortex and whiskers play a critical role in visual map plasticity.
  • Sensory map shifts are a mechanism for integrating heterogeneous sensory inputs.
  • This model provides insights into mammalian brain sensory integration mechanisms.