Figure 1.

Core motor cortical network. (A) Cortical areas that were analyzed using dynamic causal modeling. All areas share reciprocal connections. Note that all sources also exhibit intrinsic (self)-coupling, which are omitted for readability. Minimum distance between the single sources is 40 mm. (B) Design for Bayesian model selection. The critical difference between the models was whether extrinsic and/or intrinsic connections were modulated only within frequencies or additionally across frequencies.