Table 3. Group x task interaction effects on the task switching paradigm for the group of patients with obsessive-compulsive disorder (OCD), patients with major depressive disorder (MDD), and healthy controls. All activations at p<.001 uncorrected.

Regions	L/R	Cluster size	MNI coordinates				z-value
			x	y	z
			Controls>OCD
Anterior PFC	L	2	−27	51	−12		3.50
			OCD>controls
ACC	R	3	0	15	27		4.58
Postcentral gyrus	L	7	−48	−18	30		3.98
Putamen	L	3	−21	6	0		3.33
			Controls>MDD
Parietal inf	R	4	45	−36	45		3.70
Anterior PFC	R	5	21	54	0		3.72
			MDD>controls No significant activations
			OCD>MDD
Postcentral gyrus	L	9	−54	−18		27	4.00
Putamen	L	2	−21	0		6	3.56
	R	3	24	15		3	3.49
Precuneus	R	3	18	−66		48	3.22
Insula	L	2	−36	−3		6	3.43
	L	2	−33	−15		12	3.39
Supramarginal gyrus	L	2	−48	−39		27	3.10
			MDD>OCD No significant activations