Collective dynamics of neuronal activities in various modular networks
Modularity is a key feature of structural and functional brain networks. However, the association between the structure and function of modular brain networks has not been revealed. We constructed three types of modular cortical networks in vitro and investigated their neuronal activities. The modul...
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Veröffentlicht in: | Lab on a chip 2021-03, Vol.21 (5), p.951-961 |
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Sprache: | eng |
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Zusammenfassung: | Modularity is a key feature of structural and functional brain networks. However, the association between the structure and function of modular brain networks has not been revealed. We constructed three types of modular cortical networks
in vitro
and investigated their neuronal activities. The modular networks comprising 4, 3, or 2 modules were constructed using polydimethylsiloxane (PDMS) microstructures fabricated directly on a multi-electrode array (MEA) without transfer. The 4-module network had the strongest modular connectivity, followed by the 3-module and 2-module networks. To investigate how neuronal activities were affected by the modular network structure, spontaneous neuronal activities were recorded on different days
in vitro
and analyzed based on spike amplitudes, network bursts, and the propagation properties of individual spikes. Different characteristics were observed depending on the network topology and modular connectivity. Moreover, when an electrode was stimulated by biphasic voltage pulses, bursts were elicited for the 4-module network, whereas spikes were elicited for the 3-module and 2-module networks. Direct fabrication of the PDMS microstructures on the MEA without transfer allows microscale construction of modular networks and high-density functional recording; therefore, the technique utilizing the PDMS microstructures can be applied to the systematic study of the dynamics of modular neuronal networks
in vitro
.
Three type of modular networks are constructed using polydimethylsiloxane (PDMS) microstructures fabricated on a multi-electrode array (MEA) without transfer to investigate how neuronal activities are affected by modular network structure. |
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ISSN: | 1473-0197 1473-0189 |
DOI: | 10.1039/d0lc01106a |