Sampling effects and measurement overlap can bias the inference of neuronal avalanches
Fig 6
In vivo and in vitro avalanche-size distributions p(S) from LFP depend on time-bin size Δt.
Experimental LFP results are reproduced by many dynamics states of coarse-sampled simulations. A: Experimental in vivo results (LFP, human) from an array of 60 electrodes, adapted from [43]. B: Experimental in vitro results (LFP, culture) from an array with 60 electrodes, adapted from [1]. C–F: Simulation results from an array of 64 virtual electrodes and varying dynamic states, with time-bin sizes between 2 ms ≤ Δt ≤ 16 ms, γ = 1 and dE = 400 μm. Subcritical, reverberating and critical dynamics produce approximate power-law distributions with bin-size-dependent exponents α. Insets: Log-Log plot, distributions are fitted to p(S) ∼ S−α, fit range S ≤ 50. The magnitude of α decreases as Δt−β with −β indicated next to the insets, cf. Table 2.