Confusion regarding artifact plots on BOLD summary

Hey!

I have been processing several recent subjects through fMRIprep, but have gotten some peculiar BOLD Summary plots that I’m having trouble making sense of. [Please refer to the attached images]

This data was collected from a clinical subject pool, which is prone to movement, but I don’t understand what would explain these abrupt aberrations that then flatline. There were also issues with ghosting on brain maps and aCompCor components decomposition, if that might relate.

Have you looked at raw bold data in any nifti viewer to make sure there are no artifacts throughout the whole time series?