______our housework, it’s a dirty and a thankless job, but it’s also important. In your house, if you stop cleaning your kitchen for a month, your home will become completely unliveable very quickly. But in the brain, the consequences of falling behind may be much______ the embarrassment of dirty countertops, because when it comes to cleaning the brain, it is the very health and function of the mind and the body that’s at stake, which is why understanding these very basic housekeeping functions of the brain today may be critical for preventing and treating diseases of the mind tomorrow.