Because the outcome of the PLS analysis might vary with the valence of our materials, we conducted separate analyses for Negative and Neutral scenes. For Negative scenes, the first LV accounted for 76% and 79% of the covariance between intrusion control activations and behavioral measures of intrusion proportion and affect suppression within the frontoparietal retrieval suppression network and the MTL mask, respectively (p < 0.05). The first LV was significantly different from random noise as assessed by permutation testing (p < 0.05). For Neutral scenes, the first LV accounted for 73% and 68% of the covariance between behavioral measurements and the prefrontal retrieval suppression network and the MTL mask, respectively (p < 0.05). A second LV was not significant for either Negative or Neutral scenes.

B, Spread plots observed in best MFG showing the relationship grabbed by the PLS investigation between the upregulation (Attack ? Non-Intrusion) and you will behavioral results for Bad and you can Simple scenes

The existence of a life threatening LV one to accounts for a giant percentage of the newest covariance ranging from intrusion-handle activations and you can all of our very own behavioral procedures indicates that specific voxels during the prefrontal cortex and you can MTL was regarding mnemonic and/or affective control over unpleasant memories. They do not, although not, identify how brain activation means those people methods. To allow for more obvious interpretation of the character of them voxels, i 2nd determined “voxel salience” (the newest voxels that all led to all of our secret LV) and a head rating for every single fellow member (discover Product and methods). A brain score means simply how much confirmed fellow member conveys the newest multivariate spatial trend from relationship anywhere between intrusion handle activations and you can behavioral measures out of mnemonic and you may affective handle caught from the a keen LV.

Ergo, correlations ranging from mind ratings and you can behavioral specifications help to pick the brand new direction and stamina of the dating seized from the certain LV (which means that the brand new corresponding voxel salience over one to LV)

Critically, within the frontoparietal control network, Boston MA sugar baby we found that, for negative scenes, participants’ brain scores for the first LV correlated positively with their affect suppression scores (r = 0.60 p < 0.05, [0.35, 0.79] bootstrapped 95% CI) and negatively with intrusion proportion (r = ?0.79, p < 0.05, [?0.91, ?0.60] bootstrapped 95% CI; Fig. 5A). Importantly, this finding indicates that for those voxels having a positive salience, upregulation during Intrusions (vs Non-intrusions) negatively correlated with intrusion frequency (i.e., better mnemonic suppression), and additionally positively correlated with affect suppression score (i.e., better affective suppression) for Negative scenes (for an illustration of this pattern, see Fig. 5B). These patterns are inverted for voxels associated with a negative salience. Voxels within our retrieval suppression mask associated with a significantly positive salience (using a bootstrapping procedure; see Materials and Methods) were localized across the entire control network, including left and right MFG, dorsal portion of the anterior cingulate cortex, superior frontal medial gyrus, inferior frontal gyrus, insula, and inferior parietal cortex (Fig. 5A; Table 3). For Neutral scenes, participants' brain scores for the first LV also correlated negatively with intrusion proportion (r = ?0.72, p < 0.05, [?0.87, ?0.54] bootstrapped 95% CI) but, in contrast to findings with negative scenes, showed no significant correlation with their affect suppression scores (r = ?0.16, [?0.54, 0.19] bootstrapped 95% CI; Fig. 5A).

Outcome of the PLS analysis for both Negative and Neutral scenes (conducted within the retrieval suppression network; see Materials and Methods) between intrusion-related upregulation (Intrusion ? Non-Intrusion) and behavioral measures (intrusion proportion and affect suppression score). A, Voxels showing a significant pattern of brain/behavior correlations as revealed by the first (significant) LV were identified using a BSR threshold higher/lower than 1.96/?1.96, respectively (i.e., p < 0.05). Correlations between participants' brain scores and behavioral measures for the first significant LV are also reported in A. Error bars indicate bootstrapped 95% CI. Brain scores reflect the contribution of each participant to a given LV. The correlation between brain scores and behaviors thus reveals the meaning of the LV. These findings reveal voxels whose upregulation is associated with reduced intrusion frequency for both Negative and Neutral scenes and also with increased affect suppression score only in the case of Negative scenes (reduced negative affect for suppressed images). BSR maps were rendered on the top of the PALS human surface using Caret software (Van Essen et al., 2001) (RRID:SCR_006260).