Training course carried out at the Theoretical Institute of Biology
of the University of Angers
February 1 at June 30, 1994, under the direction of Dr.
F Chapeau-Blondeau.
This study relates to the activity of neurons exchanging trains of action
potentials, in which we seek to detect possible structures, for a better
comprehension of the informational capacities of the neural networks. The
studied trains were recorded in vivo at the Laboratory of Neurophysiology
(URA CNRS 611), University of Angers.
To analyze them we use traditional techniques of signal processing
and others more recent which, in their new uses in electrophysiology, make
it possible to obtain richer characterizations.
We thus implemented techniques resulting from the dynamics of the nonlinear
systems, study of deterministic chaos, fractal geometry, or of the models
of fractional Brownian movements. These methods made it possible in certain
cases to highlight, in the studied signals, behaviors which do not appear
by means of conventional analyses.