Table 2.

Summary of significant clusters of activation for single subtraction comparisons between random and fixed conditions per phonological unit

Consonant Random [Cr] > Consonant Fixed [Cf]
Side	Brain region	BA	kE	MNI coordinates (mm)			Z
				x	y	z
L	Inferior frontal gyrus	44	1071	−36	8	24	5.05
L	Inferior parietal lobule	40	411	−32	−56	34	4.93
R	Anterior cingulate gyrus	32	275	4	20	44	3.72
R	Insula, frontal operculum	13/47	267	34	30	6	4.26
R	Middle frontal gyrus	6	199	32	−2	44	4.59
R	Inferior parietal lobule	40	133	30	−56	40	4.07
Rhyme Random [Rr] > Rhyme Fixed [Rf]
L	Inferior frontal gyrus	44	1828	−36	22	26	4.77
L	Inferior parietal lobule	40	823	−26	−66	44	5.39
L	Anterior cingulate gyrus	32	660	−4	22	42	4.69
R	Insula, frontal operculum	13/47	289	32	26	−4	4.56
M	Cerebellar vermis		201	10	−78	−28	4.14
R	Inferior parietal lobule	40	152	36	−54	40	4.16
R	Middle frontal gyrus	6	98	28	−4	38	3.79
Tone Random [Tr] > Tone Fixed [Tf]
L	Inferior/middle frontal gyrus	44/9	2702	−44	8	30	5.50
L	Inferior parietal lobule	40	1561	−28	−64	38	5.02
M	Cerebellar vermis		236	−2	−78	−30	4.98
R	Insula, frontal operculum	13/47	2233	30	30	−4	5.48
R	Inferior parietal lobule	40	1533	40	−60	48	5.45
R	Middle frontal gyrus	6	238	36	−4	48	4.34
M	Anterior cingulate gyrus	32	887	0	18	50	5.17

Note. k_E refers to cluster extent. Coordinates (x, y, z) of peak activation are expressed in millimeters in the MNI space. Z refers to peak Z-score value within a cluster. Statistical significance was inferred at the cluster level, p_cluster < 0.05, after correcting for multiple comparisons within gray matter voxels in the whole brain. Voxel-wise height threshold, p = 0.001. L, left hemisphere; R, right hemisphere; M, medial; BA, Brodmann area.