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Visual representations during saccadic eye movements

T Moore1, A S Tolias, P H Schiller

  • 1Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Building E25, Room 634, Cambridge, MA 02139, USA. tirinm@ai.mit.edu

Proceedings of the National Academy of Sciences of the United States of America
|July 22, 1998
PubMed
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Neurons in visual area V4 show a presaccadic enhancement, strengthening visual representations before eye movements. This reactivation helps maintain a clear perception of the saccade target during eye movement execution.

Area of Science:

  • Neuroscience
  • Visual Perception
  • Oculomotor Control

Background:

  • Normal vision involves attention shifts followed by saccadic eye movements.
  • Area V4 neurons are modulated by attention and respond before saccadic eye movements.

Purpose of the Study:

  • To examine the visual selectivity of saccade-related responses in area V4 neurons.
  • To investigate the nature of presaccadic enhancement in area V4.

Main Methods:

  • Recorded activity of V4 neurons in monkeys performing delayed eye movements.
  • Used stimuli with varying orientations to assess visual selectivity.

Main Results:

  • V4 neurons exhibit a presaccadic enhancement separate from the initial stimulus response.

Related Experiment Videos

  • This enhancement is a resurgent visual representation, as selective as the initial response.
  • Presaccadic enhancement strengthens decaying featural representations before eye movements.
  • Conclusions:

    • Presaccadic enhancement in V4 strengthens visual representations for saccade targets.
    • This mechanism may maintain perception continuity across eye movements.