Table 1.

Guidelines of data quality metrics

	Good	Fair	Poor
LFP
Number of gradient induced artifact	=1020		≠1020
Residual noise in LFP	No large spike in de-noised LFP		More tdan one large spike in de-noised LFP
BOLD
Trajectory of center of mass	abs(Δx) ≤ 0.05 pixel and abs(Δy) ≤ 0.05 pixel	abs(Δx) ≤ 0.1 pixel and abs(Δy) ≤ 0.1 pixel and either abs(Δx) ≥ 0.05 pixel or abs(Δy) ≥ 0.05 pixel	abs(Δx) ≥ 0.1 pixel or abs(Δy) ≥ 0.1 pixel
DVARS	DVARS ≤ 0.5%	0.5% ≤ DVARS ≤ 1% and the number of small spikes is fewer than 5	Either DVARS ≥ 1% (large spikes) or the number of small spikes is more than 5
Image distortion	No noticeable image distortion or signal loss		Noticeable image distortion or signal loss
Function connectivity (correlation between bilateral S1 areas)	Correlation ≥ 0.3 and the correlation map is localized to somatosensory network	Correlation ≥ 0.15 and either correlation ≤ 0.3 or the correlation map is not completely localized	Correlation ≤ 0.15 or unlocalized correlation
LFP-BOLD correlation	Correlation ≥ 0.2 for both S1 areas and the correlation map is well-localized to sites surrounding electrodes	Correlation ≥ 0.1 and either correlation ≤ 0.2 or the correlation map is not completely localized	Correlation ≤ 0.1 or unlocalized correlation