Feel the Noise: Relating Individual Differences in Auditory Imagery to the Structure and Function of Sensorimotor Systems.

Correlations between representational similarity and vividness of imagery approached significance for the left SMA cluster ( r = −0.23, P = 0.09; after regressing out demographic and cognitive variables, r = −0.33, P = 0.01), but they were nonsignificant for the left inferior parietal ( r = −0.10, P = 0.48; after regressing out demographic and cognitive variables, r = −0.10, P = 0.45) and right superior parietal clusters ( r = −0.12, P = 0.39; after regressing out demographic and cognitive variables, r = −0.09, P = 0.5).

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Similar analyses focusing on control of imagery ratings revealed a marginally significant association between higher control and increased gray matter volume within the left SMA ROI (MNI coordinate for peak voxel within ROI: x = −11, y = −9, z = 72, t (1,67) = 3.11, Z = 3, P FWE = 0.05), and a negative association in the right medial superior frontal gyrus ROI (MNI coordinate for peak voxel within ROI: x = 6, y = 15, z = 33, t (1,67) = 3.12, Z = 3.01, P FWE = 0.05).

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