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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.
For more information or to request an appointment, please call (602) 406-3671.
- Aetna
- AHCCCS (Referral Required)
- Blue Cross Blue Shield
- Blue Cross Blue Shield Third Party
- Cigna
- Commercial Networks
- Government Plans
- Humana
- Market Place Plans (Referral Required)
- Medicare Advantage Plans (Referral Required)
- United Healthcare
- PhD, University of California-San Diego and San Diego State University, Clinical Psychology, 1991
- MS, North Dakota State University, Psychology (Behavior Therapy Track), 1986
- BScPsych, University of Zimbabwe, Harare, Zimbabwe, Psychology, 1983
- American Psychological Association & Division 40 (Clinical Neuropsychology), APA (Fellow)
- International Neuropsychological Society
- National Academy of Neuropsychology (Fellow)
- American Academy of Clinical Neuropsychology
- American Academy of Neurology (Affiliate)
- Movement Disorder Society
- American Society of Stereotactic and Functional Neurosurgery (Associate)
- World Society of Stereotactic and Functional Neurosurgery (Associate)
- National Academy of Neuropsychology Early Career Achievement Award, 1997
- National Academy of Neuropsychology Nelson Butters Award for Research Contributions to Clinical Neuropsychology, 1993
- Christopher E. Parker Memorial Award for Outstanding Student Research, San Diego State University, 1990
- Fellowship, Epilepsy Foundation of America, 1989
- International Center Scholarship, University of California-San Diego, 1989
- American Psychological Association Travel Grant, 1988
- Fellowship, Epilepsy Foundation of America, 1988
- International Institute of Education S.T.E.P. Grant, 1988
- Phi Beta Delta, 1988
- Phi Kappa Phi, 1987
- Psi Chi, 1985
- Zimbabwe Psychological Association Prize, 1983
- University Prize, University of Zimbabwe, 1983
- University Grant, University of Zimbabwe, 1983
- University Prize, University of Zimbabwe, 1982
Five-Year Outcomes from Deep Brain Stimulation of the Subthalamic Nucleus for Parkinson Disease
Date: 11/2025
Authors: Philip A. Starr, Rajat S. Shivacharan, Edward Goldberg, Alexander I. Tröster, Paul A. House, Monique L. Giroux, Adam O. Hebb, Donald M. Whiting, Timothy A. Leichliter, Jill L. Ostrem, Leo Verhagen Metman, Sepehr Sani, Jessica A. Karl, Mustafa S. Siddiqui, Stephen B. Tatter, Ihtsham Ul Haq, Andre G. Machado, Michal Gostkowski, Michele Tagliati, Adam N. Mamelak, Michael S. Okun, Kelly D. Foote, Guillermo Moguel-Cobos, Francisco A. Ponce, Rajesh Pahwa, Kelly Lyons, Cathrin M. Buetefisch, Robert E. Gross, Corneliu C. Luca, Jonathan R. Jagid, Gonzalo J. Revuelta
Attention/Working Memory and Executive Function in Parkinson's Disease: Review, Critique, and Recommendations
Date: 09/2025
Authors: Roberta Biundo, Ondrej Bezdicek, Davide Maria Cammisuli, Brenna Cholerton, John C. Dalrymple-Alford, Nicola Edelstyn, Eleonora Fiorenzato, Erin Holker, Saul Martinez-Horta, Alice Martini, Gabriella Santangelo, Barbara Segura, Chiara Siri, Alexander Tröster, Tiago A. Mestre, Álvaro Sánchez Ferro, Michelle Hyczy de Siqueira Tosin, Matej Skorvanek, Daniel Weintraub, Gert J. Geurtsen
A Call for Change: Updating the Operational Definition for Dementia in Parkinson's Disease
Date: 03/2025
Authors: Jaime Kulisevsky, Irene Litvan, Daniel Weintraub, Jennifer G. Goldman, Alexander I. Tröster, Simon J. Lewis
Developments in the prediction of cognitive changes following deep brain stimulation in persons with Parkinson's disease.
Date: 07/2024
Authors: Alexander I. Tröster
Level I PD-MCI Using Global Cognitive Tests and the Risk for Parkinson's Disease Dementia
Date: 05/2022
Authors: Judith A. Boel, Rob M. de Bie, Ben A. Schmand, John C. Dalrymple-Alford, Connie Marras, Charles H. Adler, Jennifer G. Goldman, Alexander I. Tröster, David J. Burn, Irene Litvan, Gert J. Geurtsen
- English
Department of Clinical Neuropsychology
222 West Thomas Road, Suite 315
Phoenix, Arizona 85013
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.
For more information or to request an appointment, please call (602) 406-3671.
Department of Clinical Neuropsychology
222 West Thomas Road, Suite 315
Phoenix, Arizona 85013
- Aetna
- AHCCCS (Referral Required)
- Blue Cross Blue Shield
- Blue Cross Blue Shield Third Party
- Cigna
- Commercial Networks
- Government Plans
- Humana
- Market Place Plans (Referral Required)
- Medicare Advantage Plans (Referral Required)
- United Healthcare
- PhD, University of California-San Diego and San Diego State University, Clinical Psychology, 1991
- MS, North Dakota State University, Psychology (Behavior Therapy Track), 1986
- BScPsych, University of Zimbabwe, Harare, Zimbabwe, Psychology, 1983
- American Psychological Association & Division 40 (Clinical Neuropsychology), APA (Fellow)
- International Neuropsychological Society
- National Academy of Neuropsychology (Fellow)
- American Academy of Clinical Neuropsychology
- American Academy of Neurology (Affiliate)
- Movement Disorder Society
- American Society of Stereotactic and Functional Neurosurgery (Associate)
- World Society of Stereotactic and Functional Neurosurgery (Associate)
- National Academy of Neuropsychology Early Career Achievement Award, 1997
- National Academy of Neuropsychology Nelson Butters Award for Research Contributions to Clinical Neuropsychology, 1993
- Christopher E. Parker Memorial Award for Outstanding Student Research, San Diego State University, 1990
- Fellowship, Epilepsy Foundation of America, 1989
- International Center Scholarship, University of California-San Diego, 1989
- American Psychological Association Travel Grant, 1988
- Fellowship, Epilepsy Foundation of America, 1988
- International Institute of Education S.T.E.P. Grant, 1988
- Phi Beta Delta, 1988
- Phi Kappa Phi, 1987
- Psi Chi, 1985
- Zimbabwe Psychological Association Prize, 1983
- University Prize, University of Zimbabwe, 1983
- University Grant, University of Zimbabwe, 1983
- University Prize, University of Zimbabwe, 1982
Five-Year Outcomes from Deep Brain Stimulation of the Subthalamic Nucleus for Parkinson Disease
Date: 11/2025
Authors: Philip A. Starr, Rajat S. Shivacharan, Edward Goldberg, Alexander I. Tröster, Paul A. House, Monique L. Giroux, Adam O. Hebb, Donald M. Whiting, Timothy A. Leichliter, Jill L. Ostrem, Leo Verhagen Metman, Sepehr Sani, Jessica A. Karl, Mustafa S. Siddiqui, Stephen B. Tatter, Ihtsham Ul Haq, Andre G. Machado, Michal Gostkowski, Michele Tagliati, Adam N. Mamelak, Michael S. Okun, Kelly D. Foote, Guillermo Moguel-Cobos, Francisco A. Ponce, Rajesh Pahwa, Kelly Lyons, Cathrin M. Buetefisch, Robert E. Gross, Corneliu C. Luca, Jonathan R. Jagid, Gonzalo J. Revuelta
Attention/Working Memory and Executive Function in Parkinson's Disease: Review, Critique, and Recommendations
Date: 09/2025
Authors: Roberta Biundo, Ondrej Bezdicek, Davide Maria Cammisuli, Brenna Cholerton, John C. Dalrymple-Alford, Nicola Edelstyn, Eleonora Fiorenzato, Erin Holker, Saul Martinez-Horta, Alice Martini, Gabriella Santangelo, Barbara Segura, Chiara Siri, Alexander Tröster, Tiago A. Mestre, Álvaro Sánchez Ferro, Michelle Hyczy de Siqueira Tosin, Matej Skorvanek, Daniel Weintraub, Gert J. Geurtsen
A Call for Change: Updating the Operational Definition for Dementia in Parkinson's Disease
Date: 03/2025
Authors: Jaime Kulisevsky, Irene Litvan, Daniel Weintraub, Jennifer G. Goldman, Alexander I. Tröster, Simon J. Lewis
Developments in the prediction of cognitive changes following deep brain stimulation in persons with Parkinson's disease.
Date: 07/2024
Authors: Alexander I. Tröster
Level I PD-MCI Using Global Cognitive Tests and the Risk for Parkinson's Disease Dementia
Date: 05/2022
Authors: Judith A. Boel, Rob M. de Bie, Ben A. Schmand, John C. Dalrymple-Alford, Connie Marras, Charles H. Adler, Jennifer G. Goldman, Alexander I. Tröster, David J. Burn, Irene Litvan, Gert J. Geurtsen
- English