Dense Fos-ir cells in granule layer of MOB appeared from the periphery to the core of MOB from birth to 30 days of age while dense Fos-ir cells appeared from apical to bottom region of AOB from birth.

• 主嗅球颗粒细胞层Fos免疫阳性细胞随着日龄的增加从边缘到中心逐渐出现 ,而副嗅球Fos免疫阳性细胞随着日龄的增加从顶部到底部逐渐出现。