Table 8.

Clusters for control covariate, age, and MMSE, interactions.

	Voxels	P-value	Z-Values peak	MNI coordinates			Structures
				X	Y	Z
Age
Semantic fluency
Y > O	772	0.000752	7.36	−46	−48	44	L Inferior parietal sulcus, anterior intra-parietal sulcus, superior parietal lobule, lateral occipital cx.
O > Y	468	0.0179	5.84	−64	−24	28	L Secondary somatosensory cx/parietal operculum, inferior parietal lobule, primary somatosensory cx BA 1 and 2, primary auditory cx.
Finger-tapping
Y > O	403	0.0352	4.22	12	−20	70	R Premotor cx BA 6, corticospinal tract, primary motor cx BA 4, primary somatosensory cx BA 3.
MMSE
Semantic fluency
Y > O	1718	2.98 e-7	5.10	−2	−52	66	LR Superior parietal lobule, primary somatosensory cx, primary motor cx; R occipital pole, lateral occipital cx.
O > Y	1592	7.15e-07	5.81	40	−58	−6	R Optic radiation, lateral occipital cx, temporal occipital fusiform cx, inferior temporal gyrus, callosal body.
	538	0.00824	6.09	−48	−54	−2	L Superior longitudinal fasciculus, middle temporal gyrus.
Finger-tapping
O > Y	522	0.00892	3.69	46	28	22	R Middle frontal gyrus, Broca’s area BA 44 and BA 45, inferior frontal gyrus, superior longitudinal fasciculus, premotor cx BA6.
	374	0.05	4.24	30	−80	2	R Lateral occipital cx, optic radiation, callosal body, inferior longitudinal fasciculus, inferior fronto-occipital fasciculus.

Y, young group; O, older group; Y > O, steeper interaction slope for the young group; O > Y, steeper interaction slope for the older adult group.