Mark Linsenmeyer, MD

Krista Hanson, PhD is an associate professor of neuropsychology and the Director of Training for the Postdoctoral Residency Programs in the Department of Neuropsychology at Barrow Neurological Institute in Phoenix, AZ. She is board certified in clinical neuropsychology and specializes in geriatric neuropsychology and neurodegenerative disorders, including the assessment of mild cognitive impairment and dementia. Dr. Hanson also has expertise in movement disorders and pre- and postsurgical evaluations for deep brain stimulation candidates and individuals with normal pressure hydrocephalus. With memberships in various professional organizations, including the American Psychological Association and the International Neuropsychological Society, Dr. Hanson is actively involved in research on cognitive aging, Alzheimer's disease, and neuropsychiatric symptoms in Parkinson's disease and other movement disorders.Generated from the website

Alexander Tröster, PhD, is a professor of neuropsychology and chair of the Department of Neuropsychology at Barrow Neurological Institute at Dignity Health St. Joseph’s Hospital and Medical Center in Phoenix. Dr. Tröster is board certified by the American Board of Professional Psychology in the specialty of clinical neuropsychology. Dr. Tröster’s expertise includes movement disorders, especially Parkinson’s disease, dementia, amnesia, and neuropsychological assessment in stereotactic and functional neurosurgery. He is a fellow of the American Psychological Association, the National Academy of Neuropsychology, and a member of several other professional societies. Dr. Tröster received his doctorate from the University of California-San Diego and San Diego State University in California in clinical psychology and completed his internship at Long Island Jewish Medical Center in New York. Dr. Tröster’s research studies include the assessment, definition, and neural bases of mild cognitive impairment in Parkinson’s disease, and the evaluation and prediction of neurobehavioral outcomes of deep brain stimulation for a variety of neurological and psychiatric conditions.

Glynnis Zieman, MD, is a neurologist in the Concussion and Brain Injury Center at Barrow Neurological Institute. She also serves as the associate program director of the Adult Neurology Residency Program. She is board certified in neurology by the American Board of Psychiatry and Neurology. Dr. Zieman’s expertise includes brain injury, sports neurology, and headache. She is a member of the American Academy of Neurology and the American Headache Society. Dr. Zieman received her medical degree from the University of Missouri—Kansas City School of Medicine. She completed her neurology residency as well as fellowships in neuro-oncology and sports neurology at Barrow. Dr. Zieman’s research interests include incidence of and recovery from traumatic brain injury in domestic violence survivors and posttraumatic headache.