Linear and nonlinear measures predict swimming in the leech

Autor:	J Los, Peter D. Brodfuehrer, R Acera-Pozzi, E Engler, Alfonso M Albano, R Thompson, C. J. Cellucci, Hana M. Dobrovolny
Rok vydání:	2000
Předmět:	Nonlinear system Hirudo medicinalis biology Autocorrelation Statistics Leech Biological system biology.organism_classification Signal Measure (mathematics) Standard deviation Mathematics Surrogate data
Zdroj:	Scopus-Elsevier
ISSN:	1095-3787 1063-651X
Popis:	Stimulation of a trigger interneuron of an isolated nerve cord preparation of the medicinal leech, Hirudo medicinalis, sometimes leads to swimming; sometimes it does not. We investigate signals transmitted in the ventral cord of the leech after stimulation and seek quantitative measures that would make it possible to distinguish signals that predict swimming from those that do not. We find that a number of linear as well as nonlinear measures provide statistically significant distinctions between the two kinds of signals. The linear measures are the time dependence of (i) the standard deviation and (ii) the autocorrelation function at a small time delay. The nonlinear measures are (i) a measure of nonlinear predictability and (ii) the time dependence of a measure of the size of the embedded signal trajectory. Calculations using surrogate data suggest that the differences between the two classes of signals are dynamical as well as statistical.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a04c2b6c3d59b9378cdf116be1b5f58c https://doi.org/10.1103/physreve.62.4826 Zobrazit plný text záznamu