ons disease, and schizophrenia. In Parkinsons disease, levels of the chemical get so low, voluntary movement becomes impossible. A low level of dopamine in the basal ganglia frontal lobe and the ventral tegmental nucleus pathway is a factor in negative symptom schizophrenia where the affected person becomes introverted and apathetic. On the other end of the scale, excessive levels of the chemical can cause positive symptom schizophrenia. In this situation, an affected person may have hallucinations and become excessively paranoid.Not every neurotransmitter has been found, and we are far from identifying what they all do, and how they all work. To understand ourselves, we must understand the brain. Every day new discoveries are made, explaining why we feel so satisfied after a big pancake breakfast, or how we can be so immersed in a book that we dont feel a tap on the shoulder. The future, and more research, holds the keys to many more of the mysteries locked within us....
