Interplay between synaptic delays and propagation delays in neural fields equations

Neural fields equations describe the activity of neural populations at a mesoscopic level. Although the early derivation of these equations introduced space dependent delays coming from the finite speed of signal propagation along axons, there has been few studies concerning their role in shaping the dynamics of neural activity. This is mainly due to the lack of analytical tractable models. On the other hand, constant delays have to be introduced to model the synaptic transmission and the spike initiation dynamics. By incorporating the two kind of delays in the neural fields equations, we are able to find the Hopf bifurcation curves analytically as well as the normal forms of the main bifurcations. This allows an in-depth study of two different types of connectivity that reveals a surprisingly rich dynamical portrait because the connectivity and the space dependent delays couple dynamically. In particular, the shape of the connectivity strongly influences the spatiotemporal dynamics.

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Source https://inria.hal.science/hal-00780444
Author Veltz, Romain
Maintainer CCSD
Last Updated May 10, 2026, 17:10 (UTC)
Created May 10, 2026, 17:10 (UTC)
Identifier Report N°: RR-8020
Language en
Rights https://about.hal.science/hal-authorisation-v1/
contributor Neurosciences Mathématique et Computationnelle (NEUROMATHCOMP) ; Centre Inria d'Université Côte d'Azur ; Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-INRIA Rocquencourt ; Institut National de Recherche en Informatique et en Automatique (Inria)-École normale supérieure - Paris (ENS-PSL) ; Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université Nice Sophia Antipolis (1965 - 2019) (UNS)-Centre National de la Recherche Scientifique (CNRS)
creator Veltz, Romain
date 2013-01-23T00:00:00
harvest_object_id f287196a-a509-405c-82f1-b5faf002502c
harvest_source_id 3374d638-d20b-4672-ba96-a23232d55657
harvest_source_title test moissonnage SELUNE
metadata_modified 2025-08-26T00:00:00
relation info:eu-repo/grantAgreement//269921/EU/Brain-inspired multiscale computation in neuromorphic hybrid systems/BrainScaleS
set_spec type:REPORT