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Keyword: combinatorial coding ×Clear all

3 claims from 1 paper

1. Neuroscience › Memory and Neural Mechanisms

   What Grid Cells Convey about Rat Location

   Fiete, Burak and Brookings · Journal of Neuroscience · 2008

   The paper formalises how rodent grid cell firing relates to a rat's position, treating it as a neural code, and examines its capacity, error-correction potential and arithmetic properties.

   Unchecked3 claims
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   1. UncheckedAlthough each grid cell fires in a repeating spatial pattern that seems wasteful, the paper says the population code is fully combinatorial in capacity.“We show that, although the spatially periodic response of grid cells appears wasteful, the code is fully combinatorial in capacity.”
   2. UncheckedGrid cells' combined code could unambiguously specify rat position over ranges far larger than any single grid's 1-10 m period, with spare capacity for error correction.“The resulting range for unambiguous position representation is vastly greater than the approximately 1-10 m periods of individual lattices, allowing for unique high-resolution position specification over the behavioral foraging ranges of rats, with excess capacity that could be used for error corre…”
   3. UncheckedThe paper states that the grid cell code's benefits go beyond capacity and include arithmetic properties that make updating a rat's position easier.“Next, we show that the merits of the grid cell code for position representation extend well beyond capacity and include arithmetic properties that facilitate position updating.”