Table 1.

Peak voxels, cluster sizes (k) and t-values for neural activity during UT (UT 2-back > independent 2-back)

UT n-back > independent n-back
Region	Cluster peak (x, y, z)			Cluster size (k)	t-value
Right dorsolateral PFC	38	2	34	73	4.4
Left intermediate visual cortex	−30	−90	−8	64	4.21
Right ventrolateral PFC	52	34	6	54	4.08
Left inferior frontal operculum	−34	6	30	25	3.96
Right thalamus	14	−20	12	20	3.94
Right intermediate visual cortex	28	−92	0	22	3.86

P < 0.001 (uncorrected), k ≥ 20.