Dr. DeBellis is a licensed clinical psychologist who is board certified in neuropsychology. He completed his internship at UC Davis Medical Center. He lectures at U.C. Davis Medical Center as well as Sonoma State University. Topics of lecture include functional neuroanatomy, physiological psychology, cognitive psychology and personality.

Dr. DeBellis specializes in treatment of patients with traumatic brain injury, dementia, stroke and other acquired brain injury. His focus is on the relationship between brain changes and cognitive and emotional functioning.  Other special areas of interest include:  geriatric memory changes, ADHD and other cognitive related changes.  He sees patients ages 16 years and older.

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