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Thomas W. McAllister, MD

Adjunct Professor of Psychiatry

Additional Titles/Positions/Affiliations:
Millennium Professor of Psychiatry and Neurology
Vice Chair for Neuroscience Research, Department of Psychiatry


Dartmouth College, AB 1975
Dartmouth Medical School, MD 1978

Neuroscience Center at Dartmouth
Program in Experimental and Molecular Medicine


Contact Information:

Dartmouth Medical School
HB 7750
Hanover NH 03755

Professional Interests:

Neuropsychiatric aspects of traumatic brain injury (TBI)
Biomechanical, neurogenetic, and neurochemical sources of outcome variation after mild-moderate traumatic brain injury
Biomechanical and neuroimaging biomarkers of concussion

Grant Information:

R01 HD048176: Role of Candidate Alleles in Cognitive Outcome After TBI. NICHD. 10/01/04 – July 31, 2010 (TW McAllister, PI)

This project explores role of candidate alleles in modulating cognitive and behavioral outcomes 1 month and 1 year after TBI. A subgroup undergo fMRI and structural imaging at those time points.

1R01HD047242: RCT Methylphenidate & Memory/Attention Training in TBI. NICHD. 7/01/06 – 2/28/11. (TW McAllister, PI)

This is a randomized placebo controlled 2X2 design assessing efficacy of methylphenidate and a cognitive rehab intervention in alleviating cognitive complaints and deficits 4-30 months after TBI. A subgroup undergo fMRI and structural imaging pre and post treatment.
HRSA US MCHB TBI Post Demonstration Grant. 4/01/06 – 3/30/09 (TW McAllister, Co-PI).

This project works to equip nurses and family/caregivers to support individuals with TBI and neurobehavioral challenges.

1RO1NS055020: Role of Biomechanical Force Exposure and Genotype on Outcome After TBI. National Institute of Neurological Disorders and Stroke. 7/01/07 – 6/30/12 (McAllister, TW: PI).

This project uses helmet based accelerometers, structural and functional imaging, and neurocognitive assessment to study the effects of concussion and repetitive sub-concussive blows to the head in college student athletes (Dartmouth football and hockey players).

1R01HD48638 Biomechanical Basis of Mild Traumatic Brain Injury. NICHD Biomedical Research Partnership Grant. 2007-2012. Principal Investigator (PI): Richard M. Greenwald, PhD., Role: Site PI, Dartmouth Medical School.
This project is a multi-site consortium exploring the basis of sports concussion.
R01/CE001254: Effect of Biomechanical Force Exposure on Cognition and Brain Activation in Student Athletes: Centers For Disease Control, 9/01/07 – 8/31/11 (McAllister, TW: PI).

This project uses helmet based accelerometers, structural and functional imaging, and neurocognitive assessment to study the effects of concussion and repetitive sub-concussive blows to the head in high school athletes (Hanover High School football players.)

PT075446 - “Dartmouth and NCPTSD/Northern New England VA Consortium for PTSD/TBI”), Department of Defense (DOD) Post-Traumatic Stress Disorder and Traumatic Brain Injury (PTSD/TBI) Research Program of the Office of the Congressionally Directed Medical Research Programs (CDMRP).(McAllister, TW: PI). Nov. 1, 2008 -Sept 30, 2013.

This project funds the Dartmouth TBI Research Program, the National Center for PTSD, and the Northern New England VA Research Consortium to be one of 10 participating clinical sites as part of a DOD PTSD/TBI Clinical Consortium. A variety of clinical trials addressing TBI, PTSD and the co-morbid condition will be funded through this mechanism in the next five years. The award made to UCSD is: W81XWH-08-2-0159

R01HD047242-04S1: The Eunice Kennedy Shriver National Institute Of Child Health & Human Development: RCT Methylphenidate & Memory/Attention Training in Traumatic Brain Injury. This is a CER supplement awarded under the terms of the American Recovery and Reinvestment Act of 2009. 09/30/2009 – 09/29/2011, $271,198, (McAllister, TW: PI)

Selected Publications:


  • McAllister TW, Flashman LA, Harker Rhodes C, Tyler AL, Moore JH, Saykin AJ, McDonald BC, Tosteson TD, Tsongalis GJ Single nucleotide polymorphisms in ANKK1 and the dopamine D2 receptor gene affect cognitive outcome shortly after traumatic brain injury: a replication and extension study. Brain Inj 2008 Aug; 22(9):705-14 (view details on MedLine)

  • McAllister TW. Polymorphisms in genes modulating the dopamine system: do they inf luence outcome and response to medication after traumatic brain injury? J Head Trauma Rehabil 2009 Jan-Feb; 24(1):65-8 (view details on MedLine)

  • Stein MB, McAllister TW. Exploring the convergence of posttraumatic stress disorder and mild traumatic brain injury. Am J Psychiatry. 2009 Jul;166(7):768-76. Epub 2009 May 15. (view details on MedLine)

  • McAllister TW. Psychopharmacological issues in the treatment of TBI and PTSD. Clin Neuropsychol. 2009 Nov;23(8):1338-67. Review. (view details on MedLine)

  • McAllister TW. Genetic factors modulating outcome after neurotrauma. PM R. 2010 Dec;2(12 Suppl 2):S241-52. Review. (view details on MedLine)

  • Maerlender A, Flashman L, Kessler A, Kumbhani S, Greenwald R, Tosteson T, McAllister T. . Examination of the Construct Validity of ImPACT™ Computerized Test, Traditional, and Experimental Neuropsychological Measures. The Clinical Neuropsychologist, in press

  • McAllister TW, Stein MB. Effects of psychological and biomechanical trauma on brain and behavior. Ann N Y Acad Sci. 2010 Oct;1208:46-57. doi: 10.1111/j.1749-6632.2010.05720.x. Review. (view details on MedLine)

  • Wishart HA, Roth RM, Saykin AJ, Rhodes CH, Tsongalis GJ, Pattin KA, Moore JH, McAllister TW. COMT Val158Met Genotype and Individual Differences in Executive Function in Healthy Adults. J Int Neuropsychol Soc. 2011 Jan;17(1):174-80. Epub 2010 Dec 10. (view details on MedLine)

  • Crisco JJ, Wilcox BJ, Beckwith JG, Chu JJ, Duhaime AC, Rowson S, Duma SM, Maerlender AC, McAllister TW, Greenwald RM. Head impact exposure in collegiate football players. J Biomech. 2011 Oct 13;44(15):2673-8. Epub 2011 Aug 27. (view details on MedLine)

  • Sloan CD, Shen L, West JD, Wishart HA, Flashman LA, Rabin LA, Santulli RB, Guerin SJ, Rhodes CH, Tsongalis GJ, McAllister TW, Ahles TA, Lee SL, Moore JH, Saykin AJ Genetic pathway-based hierarchical clustering analysis of older adults with cognitive complaints and amnestic mild cognitive impairment using clinical and neuroimaging phenotypes. Am J Med Genet B Neuropsychiatr Genet 2010 Jul; 153B(5):1060-9 (view details on MedLine)