Other findings verified that the repetitive transcranial magnetic stimulation (rTMS) could enhance the synaptic plasticity (long‐term potentiation) of hippocampus region and be associated with the improvement of recognition memory deficit by increasing the level of BDNF expression in rats (Xiang et al., 2019), while decreased plasma BDNF levels were significantly correlated with delayed memory in mild neurocognitive disorder patients (Levada et al., 2016). This evidence concerns the gene BDNF and mild neurocognitive disorder.