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M.D. University of Maryland School of Medicine - 1983
B.A. - Psychology The Johns Hopkins University - 1979
My research interests have focused on the neural basis of semantic memory in the human brain. My work, spanning several decades, has focused on identifying the organization of semantic memory in the human brain by proposing that there is both a categorical and featural structure to object memory that exists in multiple semantic memory subsystems in the brain. My laboratory's recent studies have used functional neuroimaging and electrophysiological investigations to explore the neural mechanisms underlying combining these components of an object together to form an integrated object memory. They recently reported that one neural mechanism by which object recall can occur is via synchronizing gamma brain rhythms that are modulated by the thalamus and proposed the Neural Hybrid Model of Semantic Memory. I am now investigating object memory and word finding deficits in multiple disease states in terms of both diagnosing and designing treatment options based on this model.
Predictors of Life Expectancy in Autopsy-Confirmed Alzheimer’s Disease 2022 - Journal Article
Reversal of unilateral hand movement dysfunction by high definition transcranial direct current stimulation in a patient with chronic traumatic brain injury 2022 - Journal Article
Examination of the Proposed Criteria for Traumatic Encephalopathy Syndrome: Case Report of a Former Professional Football Player. 2022 - Journal Article
Polarity-specific high-definition transcranial direct current stimulation of the anterior and posterior default mode network improves remote memory retrieval. 2021 - Journal Article
Frequency and Predictors of Traumatic Encephalopathy Syndrome in a Prospective Cohort of Retired Professional Athletes. 2021 - Journal Article
Auditory N2 Correlates of Treatment Response in Posttraumatic Stress Disorder. 2021 - Journal Article
Differential effects from cognitive rehabilitation and high-definition tDCS in posterior cortical atrophy: A single-case experimental design. 2021 - Journal Article
Case Report: Improving Verbal Retrieval Deficits With High Definition Transcranial Direct Current Stimulation Targeting the Pre-Supplementary Motor Area in a Patient With Chronic Traumatic Brain Injury. 2021 - Journal Article
Professor of Behavioral and Brain Sciences University of Texas at Dallas [2006–Present]
Distinguished Chair in Neuroscience
Professor University of Texas Southwestern Medical Center [2006–Present]
Departments of Neurology and Psychiatry
Professor University of Texas Southwestern Medical Center [2010–Present]
Clinical Psychology Program
Behavioral Neurology and Neuropsychiatry, UCNS, 10/23/06
Editorial Board, Neurocase (1998-)
Editorial Board, Neuropsychology (2006-09)
Editorial Board, Journal of Innovative Optical Health Sciences (2007)
Editorial Board, World Journal of Radiology (2009)
Review Editorial Board, Frontiers in Neuro-psychiatric Imaging and Stimulation (2010-)
Editorial Board, Journal of Alzheimer’s Disease (2015-16)
Researchers from The University of Texas at Dallas have found that a standard therapy for post-traumatic stress disorder (PTSD) is more effective when paired with transcranial magnetic stimulation of the brain.
A study led by the UT Dallas Center for BrainHealth examining the neuropsychological status of former National Football League players has found heightened incidence of cognitive deficits and depression among retired players.
But researchers from the center and from UT Southwestern Medical Center say their study, published online Monday in JAMA Neurology, also is significant for what it did not find: evidence of cognitive impairment in the majority of ex-players.
Researchers at Center for BrainHealth at UT Dallas have developed a test that may help detect who is at risk for Alzheimer’s disease.
In a study published in the Journal ofAlzheimer’s Disease, scientists found that individuals with amnestic mild cognitive impairment (aMCI) have twice the risk of others in their age group of progressing to Alzheimer’s after identifying a specific variation in their brain waves.
Dr. John Hart Jr. received $2,022,497 from the Congressionally Directed Medical Research Program for his research on Treatment of Verbal Retrieval Deficits in Mild Traumatic Brain Injury with High Definition Transcranial Direct Current Stimulation. Dr. Hart plans to use the grant to test the efficacy of targeting pre-supplementary motor areas (preSMA) with HD transcranial Direct Current Stimulation (tDCS) to treat verbal retrieval deficits in veterans with remote mild traumatic brain injury histories and subjective complaints of verbal retrieval deficits.