Table 1 Cluster summary table for the surface-based group analysis (N = 17) conducted on the searchlight pattern analysis (multiple regression with sample, operation, operand, and result predictors on the fMRI distance matrices)

Hemisphere	Cluster label	Max	Size (mm²)	MNI X	MNI Y	MNI Z	CWP	NVtxs
Sample—early delay
Left	G_oc-temp_med-Lingual	4.53	614.0	−12.5	−84	−13.2	0.0314	609
Right	S_parieto_occipital	4.45	527.6	12.8	−71.2	19.4	0.0466	662
Sample—middle delay
Left	S_oc_sup_and_transversal	6.33	13320.9	−34.6	−80.1	19.2	0.0008	22,980
Left	S_front_sup	4.60	3222.6	−20.6	29.3	33.6	0.0120	5834
Right	S_oc_sup_and_transversal	6.03	9186.8	34.6	−73.1	23.2	0.0012	17,077
	S_front_sup	5.22	1633.0	21.5	−3.8	55.7	0.0262	3198
	S_precentral-inf-part	4.46	1605.6	38.7	2.8	28.2	0.0266	3090
Sample—late delay
Left	G_pariet_inf-Angular	6.81	5010.4	−41.1	−64.7	45.4	0.0032	10,617
	S_front_sup	4.51	3045.1	−19.5	40.2	33.6	0.0068	4758
	S_subparietal	4.20	1432.9	−6.8	−48.9	29.6	0.0203	2991
	G_temporal_middle	3.50	1006.9	−55.2	−56.9	−2.8	0.0314	1710
Right	G_pariet_inf-Supramar	5.37	8843.4	53.8	−38.4	45.4	0.0004	19,265
	S_front_sup	4.61	1368.1	20.3	22.5	44.7	0.0207	2528
	G_front_middle	5.39	880.0	41.9	16.7	43.5	0.0427	1461
Operand—late delay
Left	S_front_inf	3.03	608.9	−37.1	30.2	12.9	0.0270	941
Result—late delay
Left	G_pariet_inf-Angular	7.13	1717.0	−41.6	−64.1	45.2	0.0028	3632
Left	G_front_middle	6.41	1377.1	−40	10.9	40.4	0.0076	2367
Right	S_precentral-inf-part	4.06	1303.4	34.2	5.6	33.5	0.0092	2282
Right	S_subparietal	3.52	609.5	7.8	−46.4	42.2	0.0494	1619

For each contrast displayed in Fig. 2, and each cluster surviving p_FWE < 0.05 (corrected at cluster level by permutation methods with cluster forming threshold p < 0.01), the table reports: the cluster label (as defined by the anatomical labels from the Destrieux Atlas), the maximum −log10(p) value in the cluster (Max), the cluster surface area in mm² (size), the MNI coordinates of the maximally activated vertex within each cluster (MNI X, Y, Z), the cluster-wise p-value of each cluster (CWP), the number of vertices included in each cluster (NVtxs). No above threshold clusters were detected for the operation at any time window, nor for the operand and result at the early and middle delay.

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