Table 1.

Set of group averages for predictor variables entered into multiple linear regression analyses.

Measure	Young	Middle	Older
Age	32.78	53.967	75.505
Motion	0.087	0.104	0.096
pHPC activity	0.146	0.118	0.087
aHPC activity	0.059	0.058	0.046
ANG activity	0.080	0.072	0.054
PMC activity	0.089	0.079	0.065
PHC activity	0.042	0.039	0.033
mPFC activity	0.067	0.067	0.082
MTG activity	0.046	0.054	0.061
PRC activity	0.002	−0.001	−0.001
TP activity	−0.007	−0.001	−0.009
VC activity	0.016	0.005	0.01
Log Mem Imm	16.09	14.53	13.47
Log Mem Del	14.67	13.78	11.41
Verbal fluency	12.34	12.03	9.94
Visuospatial	15.49	14.53	14.0
Word memory	23.65	22.36	19.51