Journal
NATURE NEUROSCIENCE
Volume 16, Issue 7, Pages 925-U196Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/nn.3405
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Funding
- US National Institutes of Health [NS077340]
- National Science Foundation [II-1114833]
- Pew Charitable Trusts
- Consejo Nacional de Investigaciones Cientificas y Tecnicas (Argentina)
- Direct For Computer & Info Scie & Enginr
- Div Of Information & Intelligent Systems [1114833] Funding Source: National Science Foundation
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The brain's ability to tell time and produce complex spatiotemporal motor patterns is critical for anticipating the next ring of a telephone or playing a musical instrument. One class of models proposes that these abilities emerge from dynamically changing patterns of neural activity generated in recurrent neural networks. However, the relevant dynamic regimes of recurrent networks are highly sensitive to noise; that is, chaotic. We developed a firing rate model that tells time on the order of seconds and generates complex spatiotemporal patterns in the presence of high levels of noise. This is achieved through the tuning of the recurrent connections. The network operates in a dynamic regime that exhibits coexisting chaotic and locally stable trajectories. These stable patterns function as 'dynamic attractors' and provide a feature that is characteristic of biological systems: the ability to 'return' to the pattern being generated in the face of perturbations.
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