Table 1.

Activated brain areas during perceptual switching and tone detection

Brain area	BA	Perceptual switching				Tone detection
		x	y	z	Z score	x	y	z	Z score
Δf; 2 semitones (n = 12)
Posterior insular cortex	L13	−42	12	−4	4.22	−48	12	−6	5.52
	R13	48	16	−4	4.40	46	10	−2	4.55
Auditory cortex	L41/42	−54	−24	8	4.31	−46	−16	10	5.27
	R41/42	50	−26	8	3.78	48	−14	8	5.87
Medial geniculate body	L	−16	−24	0	4.57	−16	−24	0	4.67
	R	16	−26	0	4.38	14	−24	0	5.03
Supramarginal gyrus	L40	−54	−42	32	4.31	−52	−42	32	5.50
	R40	50	−40	26	4.53	54	−44	28	5.09
Cerebellum	L	−16	−60	−24	4.48	−22	−64	−28	4.78
Δf; 6 semitones (n = 12)
Posterior insular cortex	L13	−40	10	−2	3.89	−44	8	−2	4.58
	R13	−42	10	−4	4.99	46	6	0	5.42
Auditory cortex	L41/42	−52	−22	4	3.83	−50	−16	6	4.09
	R41/42	48	−18	10	4.39	48	−20	8	4.78
Medial geniculate body	L	−18	−24	0	3.56	−16	−22	0	4.33
	R	16	−22	0	3.36	20	−24	0	4.03
Cerebellum	L	−18	−64	−30	4.58	−20	−68	−28	4.98

Coordinates (x, y, z) indicate the voxel of local maxima in each area. BA, Brodmann area; L, left; R, right.