Figure 4. The contrast intra-brain neural networks between composed music and improvisation for the second experiment.

The contrast neural networks were drawn from Figure 3. The causality contrasts were obtained by taking the differences of the MIME causalities between composed music and improvisation. A link is drawn in this network if the causality contrast is significant according to a thresholding test. The red links indicate the information flow that are significantly stronger (causality values) in composed music than in improvisation, while the green links indicate the information flow that are significantly stronger in improvisation than in composed music.