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Formation of feedforward networks and frequency synchrony by spike-timing-dependent plasticity
| Title: | Formation of feedforward networks and frequency synchrony by spike-timing-dependent plasticity |
| Authors: | Masuda, Naoki Browse this author | | Kori, Hiroshi Browse this author |
| Keywords: | spike-timing-dependent plasticity | | synchronization | | feedforward networks | | complex networks |
| Issue Date: | Jun-2007 |
| Publisher: | Springer |
| Journal Title: | Journal of Computational Neuroscience |
| Volume: | 22 |
| Issue: | 3 |
| Publisher DOI: | 10.1007/s10827-007-0022-1 |
| Abstract: | Spike-timing-dependent plasticity (STDP) with asymmetric learning windows is commonly found in the brain and useful for a variety of spike-based computations such as input filtering and associative memory. A natural consequence of STDP is establishment of causality in the sense that a neuron learns to fire with a lag after specific presynaptic neurons have fired. The effect of STDP on synchrony is elusive because spike synchrony implies unitary spike events of different neurons rather than a causal delayed relationship between neurons. We explore how synchrony can be facilitated by STDP in oscillator networks with a pacemaker. We show that STDP with asymmetric learning windows leads to self-organization of feedforward networks starting from the pacemaker. As a result, STDP drastically facilitates frequency synchrony. Even though differences in spike times are lessened as a result of synaptic plasticity, the finite time lag remains so that perfect spike synchrony is not realized. In contrast to traditional mechanisms of large-scale synchrony based on mutual interaction of coupled neurons, the route to synchrony discovered here is enslavement of downstream neurons by upstream ones. Facilitation of such feedforward synchrony does not occur for STDP with symmetric learning windows. |
| Rights: | The original publication is available at www.springerlink.com |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/20501 |
| Appears in Collections: | 電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 郡 宏
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