Hi,
I have a problem that has been bothering me for a long time, we have been trying to find out why, but nothing.
In our experiment, the subjects are instructed to listen to two four-minute stories(one story, one run), and we want to make the correlation of two runs. But we found the ventricles lit up after correlation(a screenshot in attach file), does anyone have the same problem as me？

1) First, I'm not sure this is normal...

2) If it's not normal, is there anything other than head motion that could be causing this.(Because the subject had smaller head motion,<3mm).

I also used the same script to analyze my colleague's experimental data. His experiment was watching movies and then doing correlation. The ventricles don't light up unless the threshold is very low. It looks normal.

This is my script.
afni_proc.py -subj_id sub6.120 \
-dsets 6.120.1+orig.HEAD 6.120.4+orig.HEAD \
-blocks despike tshift align tlrc volreg blur mask scale regress \
-copy_anat anat6+orig \
-align_opts_aea -deoblique on -cost lpc+ZZ \
-tlrc_base TT_N27+tlrc \
-volreg_align_to MIN_OUTLIER \
-volreg_align_e2a \
-volreg_tlrc_warp \
-blur_size 6.0 \
-regress_apply_mot_types demean deriv \
-regress_est_blur_epits \
-regress_est_blur_errts \
-execute
3dTcat -prefix s6.120.1 errts.sub6.120.tproject+tlrc'[0..119]'
3dTcat -prefix s6.120.4 errts.sub6.120.tproject+tlrc'[120..239]'
3dTcorrelate -prefix 6.120.1_4 s6.120.1+tlrc s6.120.4+tlrc

Thanks,

Dan