Table 5. Comparing EEG and MEG spike cluster centroid results to the results of combined EEG/MEG using the reference head model 6C_Cal: Differences in centroid location, orientation and strength for FT9 and F9 spike clusters.

Spike type	Modality	Difference from Combined EEG/MEG
		Location Diff. (mm)	Orientation Diff. (degree)	Strength Diff. (%)
FT9	EEG	24.2	26	−7
	MEG	9.8	70	−74
F9	EEG	30.9	21	63
	MEG	9.2	79	−78