The total unilateral number of neurons in the canine entorhinal cortex and subdivisions of the hippocampus from the left hemisphere were estimated using the optical fractionator.

• 我们进一步验证了抗氧化剂或加强运动能减少年龄相关的神经元损失的假说。运动较丰富的老龄狗与同龄对照相比，神经元更多。