Figure 2

ROIs and model families for DCM analysis. (A) Three seed ROIs are shown in cSI, cSII, and iSII (group analysis with 21 participants, F-test, p_(FWE) < 0.05, k > 5, bar: F-statistics) (B) Two intra-hemispheric model families were constructed to find out whether pressure stimuli were processed in serial (left: family A) or parallel (right: family B) in cSI and cSII. With full intrinsic connectivity (thin arrows), we defined at least one and at most four modulations (empty circles) in the intrinsic connections. A key difference between family A and family B was that one driving input (a thick arrow) was applied to only cSI in family A, whereas two driving inputs (two thick arrows) were applied to both cSI and cSII. (C) Three inter-hemispheric model families were constructed to find out how pressure stimuli were delivered within cSI, cSII, and iSII: from cSI to iSII (left), from cSII to iSII (middle), or both (right). With full intrinsic connectivity, we defined a fixed modulation (filled circles) from cSI to iSII but no modulation from cSII to iSII (left), a fixed modulation from cSII to iSII but no modulation from cSI to iSII (middle), and two fixed modulation from cSI to iSII and from cSII to iSII (right). At least one modulation (empty circles) was applied to the intrinsic connections. Two driving inputs (two thick arrows) were applied to both cSI and cSII.