Neural Comput - Formation and regulation of dynamic patterns in two-dimensional spiking neural circuits with spike-timing-dependent plasticity.

Tópicos

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Resumo

Spike-timing-dependent plasticity (STDP) is an important synaptic dynamics that is capable of shaping the complex spatiotemporal activity of neural circuits. In this study, we examine the effects of STDP on the spatiotemporal patterns of a spatially extended, two-dimensional spiking neural circuit. We show that STDP can promote the formation of multiple, localized spiking wave patterns or multiple spike timing sequences in a broad parameter space of the neural circuit. Furthermore, we illustrate that the formation of these dynamic patterns is due to the interaction between the dynamics of ongoing patterns in the neural circuit and STDP. This interaction is analyzed by developing a simple model able to capture its essential dynamics, which give rise to symmetry breaking. This occurs in a fundamentally self-organizing manner, without fine-tuning of the system parameters. Moreover, we find that STDP provides a synaptic mechanism to learn the paths taken by spiking waves and modulate the dynamics of their interactions, enabling them to be regulated. This regulation mechanism has error-correcting properties. Our results therefore highlight the important roles played by STDP in facilitating the formation and regulation of spiking wave patterns that may have crucial functional roles in brain information processing.

Resumo Limpo

spiketimingdepend plastic stdp import synapt dynam capabl shape complex spatiotempor activ neural circuit studi examin effect stdp spatiotempor pattern spatial extend twodimension spike neural circuit show stdp can promot format multipl local spike wave pattern multipl spike time sequenc broad paramet space neural circuit furthermor illustr format dynam pattern due interact dynam ongo pattern neural circuit stdp interact analyz develop simpl model abl captur essenti dynam give rise symmetri break occur fundament selforgan manner without finetun system paramet moreov find stdp provid synapt mechan learn path taken spike wave modul dynam interact enabl regul regul mechan errorcorrect properti result therefor highlight import role play stdp facilit format regul spike wave pattern may crucial function role brain inform process

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