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. 2020 Mar 4;123(4):1355–1368. doi: 10.1152/jn.00591.2019

Fig. 7.

Fig. 7.

Global impact scores of facilitatory and inhibitory effects of caudal and rostral forelimb areas (CFA and RFA) on motor outputs. Box and arrow diagram summarizing the impact scores of CFA and RFA on motor outputs from the opposite hemisphere. The numbers next to each arrow report the impact score value and the thickness of the arrow is proportional to this value. Impact scores were calculated by multiplying the incidence by the mean of all significant modulations. For example, for all CFA-CFA protocols with all interstimulus intervals (ISIs) combined, the ratio of significant facilitatory effects was 0.224 (22.4%) and the average Z-score of these significant effects was 3.42. Therefore, the facilitatory impact factor of CFA on the output of its homolog was 0.77. For CFA-CFA, the impact scores for facilitatory and inhibitory effects were quite similar, suggesting CFA has comparable capacity to facilitate or inhibit the outputs of its homolog. In contrast for both RFA-CFA and RFA-RFA, the impact scores for facilitatory effects were much greater than for inhibitory effects. This suggests that RFA has a greater potential to facilitate motor outputs from the opposite hemisphere, regardless if the output is originating from CFA or RFA. Overall, the greatest facilitatory impact was from RFA on the outputs of its homolog and the greatest inhibitory impact was from CFA on the outputs of its homolog.