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Phys. Rev. Lett. 88, 118102 (2002) [4 pages]

Long Term Behavior of Lithographically Prepared In Vitro Neuronal Networks

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Ronen Segev1, Morris Benveniste2, Eyal Hulata1, Netta Cohen3, Alexander Palevski1, Eli Kapon1,4, Yoash Shapira1, and Eshel Ben-Jacob1,*
1School of Physics and Astronomy, Raymond & Beverly Sackler Faculty of Exact Sciences, Tel-Aviv University, Tel-Aviv 69978, Israel
2Department of Physiology & Pharmacology, Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv 69978, Israel
3Department of Zoology, Wise Faculty of Life Sciences, Tel-Aviv University, Tel-Aviv 69978, Israel
4Department of Physics, Swiss Federal Institute of Technology Lausanne (EPFL), 1015 Lausanne, Switzerland

Received 21 June 2001; published 4 March 2002

See accompanying Physics Focus

We measured the long term spontaneous electrical activity of neuronal networks with different sizes, grown on lithographically prepared substrates and recorded with multi-electrode-array technology. The time sequences of synchronized bursting events were used to characterize network dynamics. All networks exhibit scale-invariant Lévy distributions and long-range correlations. These observations suggest that different-size networks self-organize to adjust their activities over many time scales. As predictions of current models differ from our observations, this calls for revised models.

© 2002 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.88.118102
DOI:
10.1103/PhysRevLett.88.118102
PACS:
87.17.Nn, 05.70.Ln, 82.40.Bj

*Corresponding author. Email address: eshel@venus.tau.ac.il