From a maintenance standpoint horizontally split casings with bottom connections are preferred.
Follow up two-sample t-tests showed that TD group showed a significantly larger modulatory effect than the RD group in the bottom-up connection from FG to MTG (t(22) = 2.304, p = .031), but not in the top-down connection (t(22) = −0.462, p = .649) (See Fig. 1).
> -wrap-foot> Both groups showed a significant bottom-up connection from the amygdala to the OFC (Fig. 3).
First, we compared 4 families with or without modulatory effects on bottom-up connections.
BMS yielded the same winning family with modulatory effects on bottom-up connections from the input regions to middle temporal gyrus (MTG) and inferior frontal gyrus(IFG) with inconclusive evidence regarding top-down modulations.
Similar to the visual modality, family 3 with modulatory effects of lexical conditions on both bottom-up connections (from STG to MTG and to IFG) showed the highest evidence out of the 4 families in the first step analysis for TD (Family 3, exceedance probabilities 0.97) and RD (Family 3, exceedance probabilities 0.91).
During the first step of BMS analysis with model space partitioning, family 3 with modulatory effects of related and unrelated conditions on both bottom-up connections (from FG to MTG and to IFG) showed the highest evidence out of the 4 families for both TD (Family 3, exceedance probabilities 0.88) and RD (Family 3, exceedance probabilities 0.76).
Because we are mainly interested in bottom-up connections from the input region (FG for the visual modality, STG for the auditory modality) to MTG and IFG and top-down connections from IFG to MTG and the input region (FG for the visual modality, STG for the auditory modality), we divided model space into families of DCM models based on modulatory effects on these critical connections.
The spectral dynamics of Structure 1 emerged primarily in the high-γ band (>70 Hz), and contained mostly bottom-up connections from the posterior to anterior parts of temporal cortex.
In addition, this metric of functional asymmetry between inter-areal oscillatory interactions predicted the underlying anatomical asymmetries in terms of laminar-specific top-down and bottom-up connections (see Vezoli, Bastos, Fries, this issue for more details).
