For example, exposing rodents to an enriched environment (EE) with rich social and sensorimotor stimulation decreased anxiety-like behaviours in an elevated plus maze11, 12, 13, 14, improved sensorimotor skills15, 16 and led to larger cell proliferation and neuronal density17 along with increased expression of brain-derived neurotrophic factor (BDNF)18, 19. This evidence concerns the gene BDNF and Anxiety.