did not reach statistical significanceP = 0.1857
Some old mice have ~3 times more Alz-50 immunoreactive neurons in the EC, although this did not reach statistical significance [ Fig. 2I ; young: (2.65 ± 1.4) × 10 −5 cells/μm 2 , n = 4; old: (4.97 ± 2.87) × 10 −5 cells/μm 2 , n = 5; P = 0.1857; Student’s t test].