Table 3.

Brain regions specifically activated in relation to delta waves

Brain region	x	y	z	P	Z score
Right medial frontal gyrus (41)	4	52	−20	0.033	3.54
Left inferior frontal gyrus (13)	−40	22	−20	0.017	3.74

Here the x, y, and z values are coordinates in the MNI. The Z scores result from the statistical parametric analysis; P refers to the probability of the null hypothesis (i.e., absence of activity change associated with delta waves; P < .05), after correction for multiple comparisons on a volume of interest centered on published coordinates (reference specified for each brain area). Additional results that did not survive correction for multiple comparisons are given in Table S3.