You are here: Home / Seminars / Seminar Database / CAMP Seminar: Evidence that living neural networks operate near a second order phase transition

CAMP Seminar: Evidence that living neural networks operate near a second order phase transition

Main Content

John Beggs, Indiana University
When
01 April 2014 from 3:30 PM to 4:30 PM
Where
339 Davey Laboratory
Contact Name
Contact Phone
814-863-6673
Add event to calendar
vCal
iCal

To function optimally, living neuronal networks have been hypothesized to operate near a nonequilibrium critical point. However, previous experimental evidence for critical dynamics has been controversial. Here we present new results to demonstrate that networks containing hundreds of cortical neurons are indeed operating near a critical point. Further, we will show that network structure has a strong impact on the critical exponents, and hence the dynamics, of these networks.

John Beggs (work done in collaboration with Alan Litke, Karin Dahmen, Andrew Lumsdaine)

Funded by NSF awards 1058291, 0904912

 

Some relevant references:

Universal critical dynamics in high resolution neuronal avalanche data. Friedman, N., Ito, S., Brinkman, B., Shimono, M., DeVille, L., Dahmen, K., Beggs, J.M., and Butler, T. Physical Review Letters, 108, 208102 (2012). URL: http://hdl.handle.net/1721.1/71603

Being critical of criticality in the brain. John M. Beggs and Nick Timme. Frontiers in Fractal Physiology. 3: 163. (2012). URL:10.3389/fphys.2012.00163

Extending Transfer Entropy Improves Identification of Effective Connectivity in a Spiking Cortical Network Model. Ito S, Hansen ME, Heiland R, Lumsdaine A, Litke AM, Beggs, JM (2011) PLoS ONE 6(11): e27431. doi:10.1371/journal.pone.0027431. URL:

http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0027431

Neuronal avalanches in neocortical circuits. JM Beggs, D Plenz. The Journal of Neuroscience 23 (35), 11167-11177 (2003). http://www.jneurosci.org/content/23/35/11167.full

Seminars