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Animals actively seek information. This study shows parietal neurons signal expected information gain from eye movements, crucial for active sampling and efficient information processing.

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Decision Making

Background:

  • Animals actively gather information for learning and actions.
  • Mechanisms of active information sampling are not well understood.
  • Parietal neurons are involved in oculomotor control and decision-making.

Purpose of the Study:

  • Investigate the role of parietal neurons in active information gathering.
  • Determine how these neurons encode information relevant to subsequent actions.
  • Examine the relationship between information gain, reward sensitivity, and neural processing efficiency.

Main Methods:

  • Monkeys performed a task requiring saccades to gather visual information.
  • Recorded activity of parietal neurons during oculomotor control.
  • Analyzed neuronal responses in relation to information gain and action outcomes.

Main Results:

  • Parietal neurons encoded expected information gain before saccades.
  • Sensitivity to information gain correlated with information processing efficiency.
  • Reward sensitivity was context-dependent and not consistently encoded by these neurons.

Conclusions:

  • Parietal cells facilitate active sampling by boosting neural gain based on uncertainty.
  • These findings support a role for parietal neurons in selecting relevant cues and using information efficiently.
  • The study challenges the view that these cells solely encode economic utility.