Tuning network dynamics from criticality to an asynchronous state
Fig 3
Avalanche distributions indicate deviation from criticality as I/E ratio is increased.
(a) An avalanche is defined as a time period during which the number of active neurons (solid line) exceeds a threshold (dashed line). Avalanche duration is the number of time steps included in an avalanche, while avalanche size is the number of spikes included in an avalanche. (b) The probability distributions of avalanche duration and size for different I/E weight ratios. Color represents different I/E weight ratios as in panels c and d. Vertical axis is logarithmic with the scale bar showing 3 orders of magnitude. Distributions are shifted vertically for comparison. (c) Deviation from a power law with exponent −1.7 is measured by κ1.7 for avalanche duration as a function of I/E weight ratio. (d) Deviation from a power law with exponent −1.5 is measured by κ1.5 for avalanche size as a function of I/E weight ratio. For each I/E, we generate multiple realizations (dots) and average them to obtain the mean (solid line).