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Researchers found that the entorhinal cortex, known for spatial navigation, also encodes gaze direction. This suggests a grid-like code in the brain for visual space beyond just mapping environments.

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Area of Science:

  • Neuroscience
  • Cognitive Science

Background:

  • Entorhinal grid cells are primarily known for their role in mapping spatial environments.
  • Their function beyond spatial navigation is not well understood.

Purpose of the Study:

  • To investigate the role of the entorhinal cortex beyond spatial navigation.
  • To examine if entorhinal grid cells encode information related to visual perception.

Main Methods:

  • Human functional MRI (fMRI) was used to measure brain activity.
  • A controlled visual tracking task was employed to study gaze direction encoding.
  • Analysis focused on rotational symmetry in entorhinal cortex signals.

Main Results:

  • The entorhinal cortex showed a significant sixfold rotationally symmetric signal.
  • This signal was found to encode gaze direction during the visual tracking task.
  • Evidence suggests a grid-like code for visual space within the entorhinal cortex.

Conclusions:

  • The entorhinal grid system may play a broader role in coding information along continuous dimensions.
  • This finding expands the known functions of the entorhinal cortex beyond spatial navigation.
  • Suggests a generalizable neural code for representing continuous sensory information.