Table 2.

Thirst activations in the young and aged subject groups

Region	Young					Older
	BA	x	y	z	Z score	BA	x	y	z	Z score
Activations
S1/M1	3/4	−46	−16	30	4.21	3/4	−28	−18	48	4.84
	4	−52	−14	36	3.75	4	24	−18	48	4.97
	2	−54	−28	36	3.58	3	−20	−22	46	4.74
Inf. parietal lob.	40	−36	−38	48	4.81
SMA	6	−4	0	50	5.02	6	18	0	48	4.04
	6	0	−14	50	3.52	6	−16	−12	50	4.74
	6	0	−16	70	4.43
Premotor cortex	6	−30	−8	40	4.94	6	−32	−10	36	5.29
	6	−32	2	36	3.90	6	−14	14	48	4.77
Cingulate cortex	24a′	10	12	32	5.82
	32	10	22	28	4.74	32	14	26	26	5.22
Med. F.G.						8	−12	28	42	4.38
Middle F.G.						9	24	30	34	3.50
Inf. F.G. (orbital)	47	52	32	−2	4.84
	47	−50	28	−10	5.15
Precuneus	7	−6	−44	56	4.69
Middle Temp. G.						39	34	−72	12	5.42
Superior Temp. G.	22	−50	22	−22	5.99	22	42	16	−20	4.97
Cerebellum							2	−68	−14	4.22
Deactivations
Superior F.G.	10	20	62	18	5.41
	10	8	64	−10	4.33
Medial F.G.	11	−6	42	−12	4.70	11	0	36	−14	3.93
	9	−6	42	24	4.33
Rectal G.	11	−10	22	−20	4.49	11	6	28	−20	4.26
Superior Orb. G.	19	34	−72	24	4.98
Thalamus, Med. N.							−6	−10	12	4.21

Thirst activations in the two groups were generated by correlating thirst ratings with rCBF measures. F., frontal; G., gyrus; I., inferior; lob., lobule; Med., medial; N., nucleus; Orb., orbital; S1/M1, primary sensory–motor cortex; Temp., temporal.