Olfactory search with finite-state controllers.

Proc Natl Acad Sci U S A

Quantitative Life Sciences, The Abdus Salam International Center for Theoretical Physics, 34151 Trieste, Italy.

Published: August 2023

AI Article Synopsis

  • Long-range olfactory search is challenging due to limited odor signals and complex information encoding about source locations.
  • Current algorithms often rely on extensive continuous memory, complicating optimization and interpretation.
  • This study demonstrates that finite-state controllers with discrete memory states can effectively mimic the rich behaviors seen in living organisms, offering insights into neural models for search behavior.

Article Abstract

Long-range olfactory search is an extremely difficult task in view of the sparsity of odor signals that are available to the searcher and the complex encoding of the information about the source location. Current algorithmic approaches typically require a continuous memory space, sometimes of large dimensionality, which may hamper their optimization and often obscure their interpretation. Here, we show how finite-state controllers with a small set of discrete memory states are expressive enough to display rich, time-extended behavioral modules that resemble the ones observed in living organisms. Finite-state controllers optimized for olfactory search have an immediate interpretation in terms of approximate clocks and coarse-grained spatial maps, suggesting connections with neural models of search behavior.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10450675PMC
http://dx.doi.org/10.1073/pnas.2304230120DOI Listing

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