Table 1.

Sets of Nuisance Regressors Examined in the Presented Work

Regressor	Description	No. of regressors
mot6	3 translational and 3 rotational motion estimates	6
mot12	mot6 + 6 temporal derivative terms	12
mot24	mot12 + 12 squared terms (Friston et al., 1996)	24
csf + white	Signals averaged within 3-mm radius spheres centered at MNI (26, −12, 35) for white matter and (19, −33, 18) for CSF	2
Gs	Signal averaged across voxels of the whole brain	1
mot6 + comb	mot6 + csf + white + 4 physiological regressors from RVHRcor (2 low-frequency fluctuating time series induced by cardiac/respiratory variations and their temporal derivative terms) (Chang et al., 2009)	12
mot24 + comb	mot24 + csf + white + 4 physiological regressors from RVHRcor	30
mot24 + comb + gs	mot6 + csf + white + 4 physiological regressors from RVHRcor + gs	31

CSF, cerebrospinal fluid; MNI, Montreal Neurological Institute.