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Spatially Distributed Local Fields in the Hippocampus Encode Rat Position

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Science  09 May 2014:
Vol. 344, Issue 6184, pp. 626-630
DOI: 10.1126/science.1250444

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Extracting Spatial Information

The location of a rat can be deciphered from hippocampal activity by detecting the firing of individual place-selective neurons. In contrast, the local field potential (LFP), which arises from the coherent voltage fluctuations of large hippocampal cell populations, has been hard to decode. Agarwal et al. (p. 626) worked out how to recover positional information exclusively from multiple-site LFP measurements in the rat hippocampus. The information was as precise as that derived from spiking place cells. The approach might also be applicable more generally for deciphering information from coherent population activity anywhere in the brain.

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