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Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings
07:08

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Published on: August 1, 2018

Neural limits to representing objects still within view.

Hiroyuki Tsubomi1, Keisuke Fukuda, Katsumi Watanabe

  • 1Department of Psychology, University of Oregon, Eugene, Oregon 97403, Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo, 153-8904, Japan. htsubomi@hmt.u-toyama.ac.jp

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|May 10, 2013
PubMed
Summary
This summary is machine-generated.

Visual working memory capacity limits apply even to continuously visible items. Sustained neural activity and capacity limitations for visible objects are similar to those for non-visible ones.

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Area of Science:

  • Cognitive Neuroscience
  • Visual Perception

Background:

  • Visual working memory (VWM) is crucial for processing environmental information.
  • VWM is characterized by sustained neural activity and limited capacity for multiple items.
  • These features were traditionally thought to apply only to non-visible items.

Purpose of the Study:

  • To investigate if capacity limits and neural activity in VWM differ for continuously visible versus non-visible items.
  • To challenge the traditional view of VWM limitations.

Main Methods:

  • Neurophysiological recordings to measure neural activity.
  • Psychophysical experiments to assess behavioral performance.
  • Comparison of data for continuously visible and non-visible items.

Main Results:

  • Sustained neural activity and capacity limitations for visible items were indistinguishable from those for non-visible items.
  • This held true even when participants knew items would remain visible.
  • Explicit representation of visible objects is more limited than previously assumed.

Conclusions:

  • The capacity and neural mechanisms of visual working memory are similar for both visible and non-visible items.
  • Current assumptions about VWM limitations may need revision.
  • This finding has implications for understanding visual attention and information processing.