Kushwah et al. (2016) also explored the ameliorating potential of intermittent hypoxia against the detrimental effects of unpredictable chronic mild stress (UCMS) on anxiety and depression-like behavior in rats, through the enhancement of neurogenesis in the hippocampus, a response mediated by brain derived neurotrophic factor (BDNF). This evidence concerns the gene BDNF and depressive symptom measurement.