Table 1.

Stereological data from the hippocampus of mice

Ctr-6Enr-6Ctr-18Enr-18
Volume of the granule cell layer (mm3)0.356 ± 0.0090.373 ± 0.0080.336 ± 0.010 0.365 ± 0.013
Neuronal density9.91 ± 0.379.47 ± 0.239.55 ± 0.40 9.21 ± 0.16
Absolute number of granule cells3.90 × 105 ± 0.13 × 1053.91 × 105 ± 0.08 × 1053.57 × 105 ± 0.18 × 1053.74 × 105 ± 0.16 × 105
  • Ctr-6, Six-month-old control mice; Ctr-18, 18-month-old control mice; Enr-6, 6-month-old enriched living mice; and Enr-18, 18-month-old enriched living mice. Sample volume was 9000 μm3. The numbers are mean ± SEM. ANOVA revealed that no significant differences exist among the groups.