Conclusion:The decreasing of the synaptic glomerulus and ageing of the organella maybe the main factor of causing the olfactory bulb sensation obstruction.
结论：嗅球内突触小球和神经元减少、细胞器老化可能是导致老年性嗅觉障碍的主要原因。
2
By the sensation that chemical gas stimulates olfactory receptor and causes.