Dr. Armstrong’s primary academic appointment is as Professor and Chair of Anatomy, Physiology, and Genetics in the School of Medicine at the Uniformed Services University of the Health Sciences, where she was previously the Director of the Neuroscience Graduate Program (2002-2008) and the founding Director to establish and lead (2008-2017) the Center for Neuroscience and Regenerative Medicine (CNRM; now named the Military Traumatic Brain Injury Initiative, MTBI²), a collaborative research program with the National Institutes of Health.

Dr. Armstrong’s research program uses diverse techniques and translational approaches focused on cellular and molecular mechanisms of pathophysiology and neuroregeneration to identify and test therapeutics to mitigate white matter injury using experimental models of multiple sclerosis and traumatic brain injury. She has served on advisory and/or grant review panels for the Department of Defense, National Institutes of Health, Veterans Affairs, National Science Foundation, National Multiple Sclerosis Society and other organizations.

Dr. Armstrong teaches in the first-year medical student module on the nervous system and in several graduate student courses as well as leading graduate medical education sessions for residents in Neurology.