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Figure 4 | BMC Neuroscience

Figure 4

From: Internal representation of hierarchical sequences involves the default network

Figure 4

Connectivity/behavior correlations. Individual differences in connectivity between the right parietal seed region and the motor network partially explained the behavioral transitive inference effect. The behavioral TI effect was calculated from the reaction times for the four conditions: (RTIS-RTS)-(RTIP-RTP), which is the additional response time for the novel sequence (transitive inference) pairs relative to the learned sequence pairs, above and beyond the portion attributable to novelty only as determined from the non-sequence pairs. The connectivity TI effect was the parameter estimate for the sequence by inference by seed psycho-physiological interaction, analogous to (CIS-CS)-(CIP-CP) with C the connectivity between each voxel and the seed. (A) The behavioral and right parietal connectivity transitive inference effects were correlated in the bilateral supplementary motor area and left precentral gyrus. Significant positive correlation between the sequence by inference by seed psycho-physiological interaction and the behavioral TI effect was present in the colored voxels in a second-level analysis (p < 0.05). (B) The areas of correlation were the bilateral supplementary motor area and left precentral gyrus. The table gives cluster coordinates in the MNI atlas space corresponding to the map in (A). Voxels were p < 0.001 uncorrected, and reported clusters were significant at p < 0.05 corrected for multiple comparisons based on cluster extent (one-tailed tests). The clusters were located in areas associated with motor planning and execution. (C) The relationship between connectivity and behavioral TI effects was approximately linear. The plot shows the values from the SMA.

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