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The Nathan S. Kline Institute for Psychiatric Research

John Sidtis, Ph.D.

John Sidtis, Ph.D.

Research Scientist, Brain & Behavior Laboratory Director
Geriatric Psychiatry

Faculty Directory


Dr. John Sidtis’ research has focused on brain-behavior relationships with a special interest in speech, language, and cognition. He was a founding member of the first program in Cognitive Neuroscience, inaugurated at the Cornell University Medical College and Rockefeller University by Michael Gazzaniga and George Miller in 1978. Dr. Sidtis became a licensed neuropsychologist in 1982, which allowed him to gain significant experience with a wide range of neurological and psychiatric populations, providing a valuable foundation for his research. He has been studying brain-behavior relationships in clinical and normal populations for over 40 years, with extensive clinical experience attending at the New York Hospital, Memorial Sloan-Kettering Cancer Center, Burke Rehabilitation Hospital, the Minneapolis VA Hospital, the University of Minnesota Hospital, and since 2001, the Nathan Kline Institute.

  • NIH Division of Research Grants Reviewer, Motor Function, Speech and Rehabilitation Study Section, empaneled and ad hoc reviewer; NIH Special Review Committees and Special Emphasis Panels, Veterans Affairs Merit Review Committee.
  • Invited Speaker, Seminar on Dysarthria in Parkinson’s Disease & Ataxia: Developments in the Neurosciences, Annual Meeting of the American Speech, Hearing, and Language Association, November 2011.
  • Invited Speaker, Psychology Department, University of Indiana, Bloomington, 2011.
  • Invited Keynote Speaker, German Society for Aphasia Research and Treatment, November 2010.
  • Invited Faculty, Second International Symposium on Basal Ganglia Speech Disorders and Deep Brain Stimulation, Aix-en-Provence, France, June 2010.
Select Publications

Sidtis JJ, Volpe BT, Holtzman JD, Wilson DH, Gazzaniga MS. Cognitive interaction after staged callosal section: Evidence for transfer of semantic activation. Science 212(4492): 344-346, 1981.

Sidtis, J.J., Gatsonis, C., Price, R.W., Singer, E.J., Collier, A.C., Richman, D.D., Hirsch, M.S., Schaerf, F.W., Fischl, M.A., Kieburtz, K., Simpson, D., Koch, M.A., Feinberg, J. and the AIDS Clinical Trials Group. Zidovudine Treatment of the AIDS Dementia Complex: Results of a Placebo-Controlled Trial. Annals of Neurology 33(4): 343-349, 1993.

Sidtis, J.J. Some problems for representations of brain organization based on activation. Brain and Language 102(2): 130-140, 2007. 

Sidtis, J.J., Tagliati, M., Alterman, R., Sidtis, D., Dhawan, V., Eidelberg, D. Therapeutic high frequency stimulation of the subthalamic nucleus in Parkinson’s Disease produces global increases cerebral blood flow. Journal of Cerebral Blood Flow and Metabolism 32: 41-49, 2012.

Sidtis, J.J., Functional connectivity associated with acoustic stability during vowel production: Implications for vocal-motor control. Brain Connectivity 5(2): 115-125, 2015.