Identify how abnormal levels of specific neurotransmitters may be involved in each of these disorders: Alzheimer’s disease, Parkinson’s disease, and schizophrenia. Pick an everyday activity that you participate in (example: watching a horror movie; reading a textbook; cooking; riding a bike; etc.) and then pick three brain structures. Explain how these structures may be involved in the activity. What is biofeedback? Describe the procedure and identify some of the physical and psychological disorders where it is applied.