Often with the brain multiple regions are needed for a single function. For example planing action including movement has much to do with the prefrontal cortex

Often with the brain multiple regions are needed for a single function. For example planing action including movement has much to do with the prefrontal cortex and the basal ganglia is much involved in making smooth motions and inhibiting tremors, etc. Problems with the dopamine system also affect things like planing (ADHD) and tremors (Parkinson’s).