David E. Presti is a neuroscientist at the University of California in Berkeley, where he has taught in the Department of Molecular and Cell Biology for nearly twenty years. For many years he also worked as a clinical psychologist in the treatment of addiction and of post-traumatic-stress disorder (PTSD) at the Department of Veterans Affairs Medical Center in San Francisco, where he treated thousands of individuals for these conditions. His areas of expertise include the chemistry of the human nervous system, the effects of drugs on the brain and the mind, and the treatment of addiction. He has doctorates in molecular biology and biophysics from the California Institute of Technology and in clinical psychology from the University of Oregon. He teaches large undergraduate courses at UC Berkeley on the subjects of “Brain, Mind, and Behavior”, “Drugs and the Brain”, and “Molecular Neurobiology and Neurochemistry,” as well as small seminar classes on “Music and the Mind” (for freshmen) and “From Synaptic Pharmacology to Consciousness” (for molecular-biology and neuroscience graduate students), and has received multiple University awards for teaching. His primary research interest is the relation between mental phenomena (such as what is called consciousness) and brain physiology, the so-called mind-body problem.