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Related Experiment Videos

Neuronal responses in extrastriate cortex to objects in optic flow fields

H Sherk1, K Mulligan, J N Kim

  • 1Department of Biological Structure, University of Washington, Seattle 98195-7420, USA.

Visual Neuroscience
|November 19, 1997
PubMed
Summary
This summary is machine-generated.

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Visual cortex cells in cats can detect objects within complex motion patterns, even when their movement direction differs from the cell's preference. This suggests a role in image segmentation during locomotion.

Area of Science:

  • Neuroscience
  • Visual Perception
  • Animal Behavior

Background:

  • Visual neurons respond to objects against blank backgrounds.
  • Responses to objects within optic flow fields during locomotion are unknown.

Purpose of the Study:

  • Investigate visual cortical cell responses to objects embedded in optic flow.
  • Determine if cells can segment objects from complex motion backgrounds.

Main Methods:

  • Recorded from lateral suprasylvian visual area (LS) cells in cats.
  • Used optic flow simulations with bar and naturalistic objects (bushes, rocks).
  • Compared responses to objects with and without optic flow backgrounds.

Main Results:

  • Cells did not respond to bars in optic flow, but did without.

Related Experiment Videos

  • Most cells (273/423) responded to naturalistic objects in optic flow.
  • Object responsiveness was not correlated with preferred direction.
  • Optic flow background altered or suppressed direction selectivity in some cells.

    • Conclusions:

    • LS cells can segment objects from complex optic flow backgrounds.
    • This segmentation may be crucial for navigation and obstacle avoidance.
    • Direction selectivity is modified by optic flow context.