Table 1.

Stereological quantification of Nissl-stained neurons in Ch4i region

Group	No. Nissl-stained neurons (SEM)
Nonaged	60,300  ±  3,400
Aged intact	57,200  ±  3,900
Aged β-gal grafted	55,000  ±  5,600
Aged NGF grafted	53,100  ±  2,400

ANOVA P = 0.62