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- W3021812995 endingPage "e1007835" @default.
- W3021812995 startingPage "e1007835" @default.
- W3021812995 abstract "Non-random connectivity can emerge without structured external input driven by activity-dependent mechanisms of synaptic plasticity based on precise spiking patterns. Here we analyze the emergence of global structures in recurrent networks based on a triplet model of spike timing dependent plasticity (STDP), which depends on the interactions of three precisely-timed spikes, and can describe plasticity experiments with varying spike frequency better than the classical pair-based STDP rule. We derive synaptic changes arising from correlations up to third-order and describe them as the sum of structural motifs, which determine how any spike in the network influences a given synaptic connection through possible connectivity paths. This motif expansion framework reveals novel structural motifs under the triplet STDP rule, which support the formation of bidirectional connections and ultimately the spontaneous emergence of global network structure in the form of self-connected groups of neurons, or assemblies. We propose that under triplet STDP assembly structure can emerge without the need for externally patterned inputs or assuming a symmetric pair-based STDP rule common in previous studies. The emergence of non-random network structure under triplet STDP occurs through internally-generated higher-order correlations, which are ubiquitous in natural stimuli and neuronal spiking activity, and important for coding. We further demonstrate how neuromodulatory mechanisms that modulate the shape of the triplet STDP rule or the synaptic transmission function differentially promote structural motifs underlying the emergence of assemblies, and quantify the differences using graph theoretic measures." @default.
- W3021812995 created "2020-05-13" @default.
- W3021812995 creator A5027783350 @default.
- W3021812995 creator A5055788094 @default.
- W3021812995 creator A5066852088 @default.
- W3021812995 date "2020-05-08" @default.
- W3021812995 modified "2023-10-16" @default.
- W3021812995 title "Autonomous emergence of connectivity assemblies via spike triplet interactions" @default.
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