Table 2.

Brain activity associated with sound intensity discrimination compared with the baseline

	x	y	z	Zvalue	Size
rCBF increases
Right posterior superior temporal gyrus (22/42)	56	−34	6	5.32	271
Right dorsal inferior parietal lobule (40)	44	−48	50	5.24	411
Right precentral sulcus (6)	48	0	48	5.12	1806
Right inferior frontal operculum (45)	42	28	4	5.06
Right precentral sulcus (6)	36	0	42	4.91
Left dorsolateral cerebellar hemisphere	−38	−62	−26	4.51	151
rCBF decreases
Left posterior inferior parietal lobule (39)	−48	−62	24	4.97	223
Left superior frontal gyrus (8)	−18	28	46	4.58	311
Left superior frontal gyrus (8)	−36	14	52	3.98

Coordinates [in standard stereotactic space (Talairach and Tournoux, 1988)] refer to absolute and relative maxima of theZ value within each focus of activation; italics refer to relative maxima. x, Distance (millimeters) to right (+) or left (−) of the midsagittal line; y, distance anterior (+) or posterior (−) to vertical plane through the anterior commissure;z, distance above (+) or below (−) the intercommissural (AC–PC) line. Approximate Brodmann numbers (BA) associated with anatomical regions are given in parentheses. Size refers to the number of voxels in a given cluster (voxel size in millimeters: 2 × 2 × 2). SPM(Z) maps were thresholded atZ = 3.72 (p < 0.0001, uncorrected) and then corrected for multiple nonindependent comparisons at p < 0.05.