Coherent oscillations as a neural code in a model of the olfactory system

Author

Gutierrez-Galvez, A. ; Gutierrez-Osuna, R.

Author_Institution

Dept. of Comput. Sci., Texas A&M Univ., College Station, TX, USA

Volume

1

fYear

2003

fDate

20-24 July 2003

Firstpage

341

Abstract

This paper presents an investigation of two odor-coding mechanisms in Freeman´s KIII neurodynamics model. Motivated by experimental evidence that supports the existence of a neural code based on synchronous oscillations, we propose an analogy between synchronization in neural populations and phase locking in KIII channels. The information carried by the phase is compared against the conventional amplitude code in terms of pattern-recovery capabilities. First, the scalar invariance of the KIII with respect to phase information is established. Symmetries and redundancies in the associative memory matrices are then exploited to perform an exhaustive evaluation of patterns on an 8-channel model. Simulation results show that phase information outperforms amplitude information in the recovery of odor patterns from incomplete or corrupted sensory stimulus.

Keywords

chemioception; neural nets; neurophysiology; oscillations; physiological models; 8-channel model; Freemans KIII neurodynamics model; coherent oscillations; conventional amplitude code; corrupted sensory stimulus; neural code; odor-coding mechanism; olfactory system; pattern-recovery capabilities; synchronous oscillations; Biological information theory; Biological system modeling; Chemical sensors; Computer science; Electronic noses; Neurons; Olfactory; Pattern recognition; Sensor arrays; Signal generators;

fLanguage

English

Publisher

ieee

Conference_Titel

Neural Networks, 2003. Proceedings of the International Joint Conference on

ISSN

1098-7576

Print_ISBN

0-7803-7898-9

Type

conf

DOI

10.1109/IJCNN.2003.1223369

Filename

1223369