Fig. 4

The effect of head motion on fMRI timeseries. (A) Cortical mapping of association between frame-wise displacement (FD) and fMRI activity, from one representative subject. (B) Traces of fMRI activity from ROIs (red or blue lines) and fluctuations of head motion (black line) over the recording period. (C, D) Boxplot of squared correlation coefficients (r²) between the trace of head motion and timeseries of ROI. r² values are averaged over ROIs (C) or subjects (D). Each dot represents either each subject (C) or each ROI (D). N: Number of subjects with 40 volumes that survived different motion-based censoring levels. (E) Same as (C, D) but with the fixed data length across all threshold levels.