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Related Experiment Videos

Information optimization in coupled audio-visual cortical maps.

Mehran Kardar1, A Zee

  • 1Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.

Proceedings of the National Academy of Sciences of the United States of America
|November 26, 2002
PubMed
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Barn owls adapt their auditory processing to visual shifts using neural map plasticity. Their aural receptive fields adjust to maintain prey localization, influenced by audio-visual correlations and neural rewiring costs.

Area of Science:

  • Neuroscience
  • Sensory Processing
  • Animal Behavior

Background:

  • Barn owls use integrated audio-visual cues for nocturnal hunting.
  • Topographic maps in neurons (e.g., optic tectum) represent external space from visual or auditory signals.
  • Neural map plasticity allows adaptation to altered sensory input, such as that induced by prismatic spectacles.

Purpose of the Study:

  • To model the receptive fields of neurons involved in audio-visual integration in barn owls.
  • To investigate how neural receptive fields adapt to experimentally induced shifts in the visual field.
  • To understand the role of information maximization and neural rewiring costs in shaping sensory maps.

Main Methods:

  • Modeling neuronal receptive fields as linear filters sampling correlated audio-visual signals.

Related Experiment Videos

  • Simulating the effects of prismatic spectacles on the visual field.
  • Analyzing changes in auditory receptive field shape and position under altered visual input.

    • Main Results:

    • Visual receptive fields remained robust and unchanged by artificial visual shifts, assuming higher visual information fidelity.
    • Auditory receptive fields shifted in a compensating direction in response to prismatic glasses.
    • The shape of auditory receptive fields was modified by the costs associated with neural rewiring.

    Conclusions:

    • Auditory receptive field plasticity in barn owls is driven by correlations between visual and auditory sensory information.
    • Neural rewiring costs influence the adaptation of sensory maps, leading to modified receptive field shapes.
    • This study provides insights into the mechanisms of sensory adaptation and neural plasticity in response to environmental changes.