Table I.

Brain regions showing significant activity elicited during the roughness categorization task, for all three testing surfaces in both exploratory procedures

Anatomical structure	BA	Centre of mass			Volume
		x	y	z	μl
Frontal
Mid Frontal G	32/6	−1	8	46	7630
Mid Frontal G	6	−28	18	55	557
Mid Frontal G	9	−46	18	36	122
Mid Frontal G	46	−41	35	17	76
Mid Frontal G	9	44	26	29	623
Mid Frontal G	10	37	49	9	362
Mid Frontal G	6	24	−11	48	225
Precentral G	6	−57	0	31	719
Precentral G	6	−15	−18	68	323
Precentral G	6	57	2	28	293
Cingulate G	24	3	2	30	91
Parietal
Postcentral G	40	−46	−31	39	11800
Postcentral G	40	56	−22	21	1212
Inf Parietal Lobe	40	37	−55	42	1056
Inf Parietal Lobe	40	51	−29	44	64
Temporal
Mid Temporal G	39	−44	−74	14	2968
Mid Temporal G	39	−47	−77	29	109
Sup Temporal G	41	51	−31	17	64
Occipital
Fusiform G	19	37	−73	−14	134
Mid Occipital G	39	38	−77	13	306
Culmen		−27	−39	−23	582
Culmen		−9	−53	2	76
Precuneus	31	−11	−59	20	364
Precuneus	19	33	−71	40	124
Insula and Subcortical
Inf Frontal G	47	38	18	−4	1911
Insula	47/13	−32	19	1	1545
Insula	13	−40	−6	4	559
Insula	13	39	−5	2	72
Caudate		12	14	2	203
Lentiform Nucleus		20	14	−13	291
Lentiform Nucleus		37	−73	−14	190
Parahippocampal G		30	−49	6	97

Note: The coordinates are given within the framework of the standardized stereotaxic brain atlas of Talairach and Tournoux [1988]. Positive values for x, y, and z denote, respectively, locations to the right, anterior, and superior of the anterior commissure.