John B. Williamson, Ph.D.

John WilliamsonAssistant Professor



Phone: 352-548-6920


Curriculum Vitae


Ph.D., 2004, Virginia Polytechnic Institute and State University

Research Focus

The long term goal of my research is to advance our mechanistic understanding of the interacting effects of neurological injury and chronic stress on the brain, particularly as they relate to autonomic functions. Further, we seek to develop strategies and methods to optimize cognitive function and regulate neurophysiological state to ameliorate the effects of chronic stress on negative cascade effects such as in maladaptive aging.

Key Publications

  1. Lamb DF, Porges EC, Lewis GF, Williamson JB. Non-invasive Vagal Nerve Stimulation Effects on Hyperarousal and Autonomic State in Patients with Posttraumatic Stress Disorder and History of Mild Traumatic Brain Injury: Preliminary Evidence. Frontiers in medicine. 2017 July 31; 4:124.
  2. Williamson JB, Porges EC, Lamb DG, Porges SW. Maladaptive autonomic regulation in PTSD accelerates physiological aging. Front Psychol. 2014;5:1571. PubMed PMID: 25653631; PubMed Central PMCID: PMC4300857.
  3. Williamson JB, Heilman KM, Porges EC, Lamb DG, Porges SW. A possible mechanism for PTSD symptoms in patients with traumatic brain injury: central autonomic network disruption. Front Neuroeng. 2013 Dec 19;6:13. PubMed PMID: 24391583; PubMed Central PMCID: PMC3867662.
  4. Williamson JB, Nyenhuis Dl, Stebbins GT, Gorelick PB. Regional differences in apparent white matter integrity, cognition and mood in patients with ischemic stroke.  Journal of Clinical and experimental Neuropsychology 2010, 32, 673-681.
  5. Williamson JB, Lewis GF, Grippo A, Lamb D, Harden E, Handleman M, Lebow J, Carter CS, Porges SW.  Autonomic predictors of recovery following surgery: A comparative study.  Autonomic Neuroscience 2010:156, 60-66.

Professional Memberships

  • International Neurological Society