gamma

Direct electrical stimulation of the human brain has inverse effects on the theta and gamma neural activities

Author(s): Michał Lech, Brent M. Berry, Cagdas Topcu, Vaclav Kremen, Petr Nejedly, Bradley Lega, Robert E. Gross, Michael R. Sperling, Barbara C. Jobst, Sameer A. Sheth, Kareem A. Zaghloul, Kathryn A. Davis, Gregory A. Worrell, Michal T. Kucewicz
Direct electrical stimulation of the human brain has inverse effects on the theta and gamma neural activities 170 177 IEEE Transactions on Biomedical Engineering (TBME)
Lech et. al studied the electrophysiological response to direct electrical stimulation (DES) systematically applied in human patients at a wide range of parameters, with particular focus on the neural activities associated with memory and cognition. Subjects were stimulated in blocks of alternating frequency and amplitude parameters during quiet wakefulness. Amplification of the theta (4–7 Hz) and attenuation of the gamma (29–52 Hz) power-in-band was observed with increasing the stimulation parameters. These findings reveal the utility of simple power-in-band features for understanding and optimizing the effects of electrical stimulation on brain activities and functions. read more

A Million-Plus Neuron Model of the Hippocampal Dentate Gyrus: Critical Role for Topography in Determining Spatio-Temporal Network Dynamics

Author(s): Phillip J. Hendrickson, Gene J. Yu, Dong Song, Theodore W. Berger
A Million-Plus Neuron Model of the Hippocampal Dentate Gyrus: Critical Role for Topography in Determining Spatio-Temporal Network Dynamics 170 177 IEEE Transactions on Biomedical Engineering (TBME)

Phillip J. Hendrickson, Gene J. Yu, Dong Song, and Theodore W. Berger, University of Southern California, USA Developing large-scale, quantitatively based models of neural systems has become a realizable goal in…

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