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Updated: Jun 3, 2025
14:59
Sampling and Analysis of Animal Scent Signals
Published on: February 13, 2021
4.6K
Quantifying spectral information about source separation in multisource odour plumes
Sina Tootoonian1, Aaron C True2, Elle Stark2
1Sensory Circuits and Neurotechnology Laboratory, The Francis Crick Institute, London, United Kingdom.
Plos One
|January 10, 2025
Summary
High-frequency odor fluctuations provide detailed information for locating scent sources. This study quantifies spatial information in odor concentration correlations, suggesting olfactory systems can achieve high-resolution source localization.
Area of Science:
- Olfactory neuroscience
- Biophysics
- Computational fluid dynamics
Background:
- Odor concentration time series from spatially separated sources contain information about source distance.
- Olfactory systems, like those in mice and insects, can detect rapid odor fluctuations at high frequencies.
Purpose of the Study:
- To quantify the spatial information about source separation present in the spectral components of odor concentration correlations.
- To investigate if high-frequency acuity in olfactory systems supports odor source localization.
Main Methods:
- Utilized computational fluid dynamics simulations of multisource plumes in 2D chaotic flow.
- Generated temporally complex, covarying odor concentration fields.
- Derived analytic expressions for Fisher information in spectral components of correlations about source separation.
Main Results:
- High frequencies were more informative for source separation when sources were close relative to large flow eddies.
- Observed a similar effect in simulations with different geometry.
- Found that high-frequency acuity supports high-resolution spatial localization of odor sources.
Conclusions:
- High-frequency components of odor concentration correlations are crucial for precise odor source localization.
- The study provides a model for spectral components of correlations and an approach to quantify spatial information in odor time series.
- Suggests that the high-frequency acuity of olfactory systems is a key factor in high-resolution odor source localization.
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