Table 3. Difference of the causalities in opposite directions by the Granger causality with signal-dependent noise analysis.

Direction	Intensity	Pleasantness
PostLPFC→AntLPFC – AntLPFC→PostLPFC	−0.48	−0.614*
PostLPFC→AntINS – AntINS→PostLPFC	8.02	2.62
PostLPFC→OFC – OFC→PostLPFC	−0.03	41.03
AntLPFC→AntINS – AntINS→AntLPFC	−0.06	2.32
AntLPFC→OFC – OFC→AntLPFC	−0.03	25.07
AntINS→OFC – OFC→AntINS	−1.18	38.93

Differences with a -value smaller than 0.01 (a difference measure greater than 4.61) are indicated in bold. (*: We used the active-set algorithm for this particular link.)