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Correlation-based model of artificially induced plasticity in motor cortex by a bidirectional brain-computer interface
Fig 9
(A) Plot of 
(with α, β ∈ {a, b, c}) where J(0) is sparse and homogeneous (see C) and 
is as in Fig 8. Colors represent the pair of pre- and post-synaptic groups αβ as in the upper left key. (B) Plot of 
as 
evolves over time indicated by the color scheme. Curved arrows illustrate the iteration scheme 
and culminate at the equilibrium 
. (C) Middle: evolution of synaptic weights over time, color-coded as in A. Thick solid lines show analytical predictions of order 4, thick dotted lines show averages from simulations and thin lines show examples of individual synapses Jij(t). On either sides: plots of 
and J(t) used for simulations for t = 0 (left) and t = 80 hours (right). (D) Scatter plot of 
and corresponding averages of simulated J(t) over all time points plotted in C. For both C and D, N = 60, p = 0.3, Jmin = 0, Jmax = 0.1, η = 10−8 and Jij(0) = Jmax/4.
doi: https://doi.org/10.1371/journal.pcbi.1005343.g009