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Mesoscopic Neural Representations in Spatial Navigation.

Lukas Kunz1, Shachar Maidenbaum2, Dong Chen3

  • 1Epilepsy Center, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg im Breisgau, Germany.

Trends in Cognitive Sciences
|May 28, 2019
PubMed
Summary
This summary is machine-generated.

Mesoscopic neural oscillations, like theta and gamma waves, show spatial representations in the brain. This finding bridges the gap between single neurons and large-scale brain activity for spatial navigation.

Keywords:
grid cellsintracranial EEGmemoryneural representationoscillationsspatial navigation

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Area of Science:

  • Neuroscience
  • Computational Neuroscience

Background:

  • Mesoscopic neural oscillations, previously uncharacterized in spatial representation, are now understood to play a key role.
  • Spatial information processing was primarily studied at micro (single-neuron) and macro (large-scale network) levels.

Purpose of the Study:

  • To investigate the spatial representational capacity of mesoscopic neural oscillations.
  • To explore the role of theta and gamma oscillations in spatial navigation and their link to entorhinal cortex activity.

Main Methods:

  • Intracranial electroencephalography (iEEG) was used to measure mesoscopic neural oscillations.
  • Analysis focused on correlating oscillatory power and phase with movement parameters and spatial information.

Main Results:

  • Mesoscopic neural oscillations demonstrate spatial representations, mirroring findings at micro and macro levels.
  • Theta and gamma oscillations correlate with movement, speed, distance, location, and proximity to boundaries.
  • Entorhinal cortex oscillations show hexadirectional modulation, potentially linked to grid cell activity.

Conclusions:

  • Mesoscopic neural oscillations provide a crucial link between single-neuron and macroscopic brain signals in spatial navigation.
  • Understanding this neural code can lead to novel biomarkers and therapeutic targets for spatial disorientation disorders.