Fig. 5.

Spread of MSDs calculated for (A) a single cortical post over each of the 6 300-s intervals in the 1,800-s measurement window. (B) Simulation showing spread in 6 MSDs for a Gaussian random walk over the same time interval. (C and D) L_MSD = [MSD(τ)]^1/2 for τ = 20 s and 100 s for the data shown in A and B. (E) Distribution of the non-Gaussian parameter, α₂, computed over the full 1,800-s interval for cortical posts for N_cells = 14 cells. The distribution at τ = 20 s (black dashed line) for an 18,000-step Gaussian random walk is shown for comparison. Error bars were estimated as $1/\sqrt{N}$ for each bin in the probability distributions.