The latter two structures are located deeper in the brain. Xavier Castellanos, M.D. compared the prefrontal cortex to the brain s steering wheel with the caudate nucleus and the globus pallidus as the accelerator and the brakes. These size differences are just averages. Other differences in brain activity and function have been found. However, they have been used in several other conditions.
Stimulants can help the daytime sleepiness associated with narcolepsy.
One can add a stimulant to an antidepressant if a depressed individual has only partially responded to antidepressant therapy. Some individuals with attention and organizational problems secondary to brain damage may improve with stimulant treatment. Some individuals find that a low dose stimulant taken before sexual activity can help. Some have used stimulant medications to energize individuals who are apathetic and lethargic due to a severe medical illness. It is approved for use in individuals ages six and older.