TABLE 5.

Brain regions with nominally significantly increased activation responding to fearful faces: Morning start > Varying start (Study 2).

Contrast	Group comparison	Cluster size	Cluster p (FWE)	Region	Coordinates (MNI)			Peak t-value
					x	y	z
Fear-neutral	Morning > Varying	97	0.012	R paracentral lobule	6	–34	65	4.32
				R precentral gyrus	18	–31	74	4.2
				R supplementary motor area	9	–19	62	3.82
				L paracentral lobule	–3	–37	68	3.69

Cluster p (FWE), cluster level family-wise error corrected p-value; L, Left hemisphere; R, right hemisphere; MNI, coordinates in Montreal Neurological Institute (MNI) space; Peak t-value, peak test-statistic of the two-sample t-test. Covariates in the analysis: age, sex, migraine attack frequency per month, sleeping problems, chronotype.