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Quality coding by neural populations in the early olfactory pathway: analysis using information theory
Fonollosa Magrinyà, Jordi; Gutiérrez Gálvez, Agustín; Marco Colás, Santiago
Universitat de Barcelona
In this article, we analyze the ability of the early olfactory system to detect and discriminate different odors by means of information theory measurements applied to olfactory bulb activity images. We have studied the role that the diversity and number of receptor neuron types play in encoding chemical information. Our results show that the olfactory receptors of the biological system are low correlated and present good coverage of the input space. The coding capacity of ensembles of olfactory receptors with the same receptive range is maximized when the receptors cover half of the odor input space - a configuration that corresponds to receptors that are not particularly selective. However, the ensemble's performance slightly increases when mixing uncorrelated receptors of different receptive ranges. Our results confirm that the low correlation between sensors could be more significant than the sensor selectivity for general purpose chemo-sensory systems, whether these are biological or biomimetic.
Receptors neurals
Detectors químics
Neural receptor
Chemical detectors
cc-by (c) Fonollosa et al., 2012
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