Abstract
Specifically, during the passive stimulation task there is an abrupt decrease in the number of causal correlations after the first stimulation, which is shown to be independent of the spike-train variability of each area. Conclusions Neuronal causal correlation paths that are specific to the discriminations task are ubiquitous, bidirectional and remain approximately constant along the task in both sensory and motor areas. These findings are robust to the stimulation pair under study and the spike-train variability of each area.
Highlights
We study how neural spike activity encode, integrate and communicate information across different brain areas
Statistical tests on the estimates for four stimulation frequency pairs suggest that significant causal correlations (‘causal paths’) are highly distributed across the studied cortical areas and are present in feedforward and feedback interactions between sensory and motor areas
The percentage of incoming causal paths is steady during the time course of the task for destination areas S2, SMA, DPC and M1 while it decays during the stimulation periods for S1
Summary
We study how neural spike activity encode, integrate and communicate information across different brain areas. We use simultaneous multiple-cell recordings to estimate causal across five cortical areas (S1, S2, SMA, DPC and M1) over the time course of the discrimination task.
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