FOS and asthma: The CeA is a potential site for the regulation of the HPA axis,29 and studies have shown that the MeA may be directly implicated in the regulation of neurosecretion in the PVN.11 Both the MeA and CeA emit fibers that project to the PVN.30, 31, 32 HRP/Fos dual‐labeled neurons were mainly distributed in the MeA, suggesting that the MeA might regulate asthma attacks through the PVN.