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Adaptation to stimulus orientation in mouse primary visual cortex.

Jillian L King1, Nathan A Crowder1

  • 1Department of Psychology and Neuroscience, Dalhousie University, 1355 Oxford Street, PO Box 15000, Halifax, NS, B3H 4R2, Canada.

The European Journal of Neuroscience
|January 23, 2018
PubMed
Summary
This summary is machine-generated.

Visual adaptation in mice shows less orientation repulsion than in cats or macaques, with responses attenuated across all orientations. Differences in neural tuning may explain these species variations in visual perception.

Keywords:
animal modelcomparative neuroscienceelectrophysiologytilt-after-effectvision

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Area of Science:

  • Neuroscience
  • Visual System Processing
  • Comparative Neurobiology

Background:

  • Visual perception is influenced by prior stimulus exposure, a phenomenon known as sensory adaptation.
  • The tilt-aftereffect demonstrates this, where prior orientation exposure alters subsequent orientation perception, typically causing repulsion.
  • Neural correlates in primary visual cortex (V1) of cats and macaques show orientation tuning shifts after adaptation.

Purpose of the Study:

  • To investigate orientation adaptation in mouse V1.
  • To determine if species differences in V1 architecture and neuronal tuning impact adaptation-induced orientation shifts.
  • To compare mouse V1 adaptation with findings in cats and macaques.

Main Methods:

  • Electrophysiological recordings in mouse V1.
  • Presentation of adapting and test visual stimuli with varying orientations.
  • Analysis of neuronal responses and orientation tuning curves before and after adaptation.
  • Computational modeling to explain observed species differences.

Main Results:

  • Mouse V1 exhibited orientation adaptation, but with a mix of repulsive and attractive shifts, unlike the consistent repulsion in other species.
  • Repulsive shifts were only about twice as common as attractive shifts in mice.
  • Adapted responses were attenuated across all tested orientations in mice.
  • A model suggested that a higher proportion of broadly tuned neurons in mice could account for these differences.

Conclusions:

  • Species-specific differences in V1 neuronal architecture, particularly the proportion of broadly tuned neurons, influence visual adaptation effects.
  • Mouse V1 adaptation is less consistently repulsive than in cats and macaques, suggesting variations in neural processing.
  • These findings highlight the importance of comparative neurobiology in understanding fundamental visual processing mechanisms.