Reduction of theta rhythm dissociates grid cell spatial periodicity from directional tuning.

@article{Brandon2011ReductionOT,
  title={Reduction of theta rhythm dissociates grid cell spatial periodicity from directional tuning.},
  author={Mark P. Brandon and Andrew R. Bogaard and Christopher P Libby and Michael A. Connerney and Kishan Gupta and Michael E. Hasselmo},
  journal={Science},
  year={2011},
  volume={332 6029},
  pages={595-9}
}
Grid cells recorded in the medial entorhinal cortex of freely moving rats exhibit firing at regular spatial locations and temporal modulation with theta rhythm oscillations (4 to 11 hertz). We analyzed grid cell spatial coding during reduction of network theta rhythm oscillations caused by medial septum (MS) inactivation with muscimol. During MS inactivation, grid cells lost their spatial periodicity, whereas head-direction cells maintained their selectivity. Conjunctive grid-by-head-direction… CONTINUE READING
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