Table 1.

Human subject characteristics.

	Young control	Middle-aged control	Old control	AD
n	11	16	15	38
Age in years (mean ± SEM)	30 ± 2	50 ± 1.8	74 ± 1.8	70 ± 1.2
Gender (% female)	19%	50%	47%	34%
MMSE	30 ± 1.3	30 ± 1.2	29 ± 1.2	17 ± 0.7