Joan Ohayon, R.N., M.S.N., is a clinically registered nurse practitioner with the Neuroimmunology Branch of the National Institute of Neurological Disorders and Stroke (NINDS) of the National Institutes of Health. Joan is an associate investigator in multiple research studies involving treatments and imaging in multiple sclerosis, along with a few studies involved with a rare chronic neurological disorder, HTLV-1 Associated Myelopathy/Tropical Spastic Paraparesis (HAM/TSP). Currently she is focusing on disability and magnetic resonance imaging in multiple sclerosis. Ohayon is also actively involved with the National Multiple Sclerosis Society, National Capital Chapter. She is their research advocate and on their professional advisory committee.