To Remember, the Brain Must Actively Forget | Quanta Magazine

As Davis and Zhong argued in their jointly written 2017 review, all those findings suggested that cellular processes mediated by dopamine and Rac1 constantly erode newly formed memories. “From this perspective,” they wrote, “forgetting as mediated by intrinsic forgetting mechanisms may be the default state of the brain; intrinsic forgetting may operate chronically at a low level to slowly remove each newly acquired memory, although its strength may be regulated by internal or external factors.”