Basal ganglia
The basal ganglia also control motivation. They select actions, that is, the choice of what to do at a given time. Experimental studies show that the basal ganglia inhibit (suppress) a number of motor systems. A release of this inhibition lets a motor system act. This "behaviour switching" is influenced by signals from many parts of the brain, including the prefrontal cortex, which plays a key role in doing things.