Oct 26, 2018


BioRxiv : the Preprint Server for Biology
Alex SheremetAndrew P. Maurer


Mesoscopic neural activity may play an important role in the cross-scale integration of brain activity and in the emergence of cognitive behavior. Mesoscale activity in the cortex can be defined as the organization of activity of large populations of neurons into collective actions, such as traveling waves in the hippocampus. A comprehensive description of collective activity is still lacking, in part because it cannot be built directly with methods and models developed for the microscale (individual neurons): the laws governing mesoscale dynamics are different from those governing a few neurons. To identify the characteristic features of mesoscopic dynamics, and to lay the foundations for a theoretical description of mesoscopic activity in the hippocampus, we conduct a comprehensive examination of observational data of hippocampal local field potential (LFP) recordings. We use the strong correlation between rat running-speed and the LFP power to parameterize the energy input into the hippocampus, and show that both the power, and the nonlinearity of mesoscopic scales of collective action (e.g., theta and gamma rhythms) increase as with energy input. Our results point to a few fundamental characteristics: collective-action dyna...Continue Reading

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Mentioned in this Paper

Cascade Blue
Cortex Bone Disorders
Adrenal Cortex Diseases
Gamma-glutamyl-gamma-aminobutyrate Hydrolase Activity
Theta Rhythm
Genus Hippocampus
Structure of Hippocampal Formation
Entire Hippocampus
Brain Activity

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