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Physicians & Staff

OSU Multiple Sclerosis Center physicians are dedicated to providing patients with the latest treatment options so they can enjoy the highest quality of life. They are involved in conducting research to increase understanding of the disease, including causes of symptoms, and designing new treatments. For example, Ohio State's Wexner Medical Center physician-scientists led the way in the clinical testing of the drug Modafinal, which helps relieve fatigue among those with MS. It is now the drug of choice worldwide to treat MS-related fatigue.


D.Joanne Lynn, MD,
Associate Clinical Professor of Neurology

Dr. Lynn, named one of the “Best Doctors in America in 2005,” is board certified in Internal Medicine and  Neurology. She was recently awarded the 2007 Professor of the Year Award by the Ohio State University College of Medicine's Class of 2007. Dr. Lynn’s primary clinical and research interest is multiple sclerosis and her current research  involvement includes studies of disease modifying agents and of the effects of female hormones on the course of multiple sclerosis.  She is the director of medical student education in neurology for Ohio State University's College of Medicine and serves as the chair of the undergraduate education subcommittee for the American Academy of Neurology nationally.  She has earned
​numerous awards from the students including the Class of 2007 Integrated Program Teacher of the Year Award because of her commitment and leadership to the development of new doctors. Dr. Lynn was raised in Columbus and in keeping her expertise in the local area has helped to make The Ohio State University MS Center one of the premier MS centers in Ohio.


Michael K. Racke, MD
Professor and Chair, Department of Neurology

An international leader in neurological sciences, Dr. Racke is a distinguished scholar known for his research in immunology and multiple sclerosis. Dr. Racke serves on the executive committee of the Multiple Sclerosis Cooperative Research Group. He also served on the scientific advisory committee of the National Multiple Sclerosis Society.

He has received the prestigious Harry Weaver Neuroscience Scholarship from the National Multiple Sclerosis Society and the Young Investigator in Multiple Sclerosis
Award from the American Academy of Neurology Education and Research Foundation.

Board certified in Neurology, Dr. Racke’s clinical and research interests are neuroimmunology and multiple sclerosis, specifically studying disease pathogenesis and developing novel therapies.


Aaron Boster, MD
Assistant Clinical Professor of Neurology

Dr. Boster, a board-certified neurologist, is a graduate of Oberlin College and the University of Cincinnati College of Medicine. Dr. Boster completed his neurology residency at the University of Michigan Hospital Systems and a two year fellowship in Clinical Neuroimmunology and Multiple Sclerosis at Wayne State University in Detroit.

He has conducted research in the use of intense immunosuppression in multiple
sclerosis, the effects of ethnicity in pediatric multiple sclerosis, and clarifying multiple sclerosis diagnostic criteria. His work has been published in journals such Lancet, Neurology and Multiple Sclerosis and presented at several national and international meetings.

Dr. Boster’s clinical interests are multiple sclerosis, neuromyelitis optica, transverse
myelitis and acute disseminated encephalomyelitis. His current research interests
involve novel therapies and multiple sclerosis clinical trials as well as exploring the
use of non-conventional and ultra-high field MRI in multiple sclerosis.


Jacqueline Nicholas, MD, MPH
Assistant Clinical Professor of Neurology

Dr. Nicholas is a board-certified neurologist and a native of Columbus, Ohio. She completed her undergraduate degree at Miami University in Oxford, Ohio graduating magna cum laude with a major in Microbiology. She completed medical school at the University of Toledo in Toledo, Ohio in 2007 and was inspired by her professors in neurology to pursue a career in the field. She completed her neurology residency training at the University of Pittsburgh Medical Center in Pittsburgh, Pennsylvania in 2011 where she served as Neurology Chief Resident during her final year. Dr. Nicholas developed an interest in caring for patients with multiple sclerosis and neuromyelitis optica during residency. She went on to purse a two-year fellowship in Clinical Neuroimmunology, Multiple Sclerosis and Spasticity at The Ohio State University Medical Center under the tutelage of Dr. Michael Racke and Dr. Aaron Boster. She was awarded the prestigious Sylvia Lawry Physician Fellowship Award by the National Multiple Sclerosis Society. During her fellowship, she also obtained a Masters of Public Health degree focusing on Clinical Translational Science at The Ohio State University College of Public Health to enhance her skills in designing and conducting clinical research studies. Dr. Nicholas joined the faculty at The OSU Multiple Sclerosis Center in 2013.

Dr. Nicholas has published articles on Multiple Sclerosis in several peer reviewed journals and presented her research at national and international meetings including the AAN, CMSC and ECTRIMS. Her major clinical interests are multiple sclerosis, neuromyelitis optica, transverse myelitis, optic neuritis, acute disseminated encephalomyelitis and spasticity. Dr. Nicholas is experienced in spasticity management with oral antispasmodics, intrathecal baclofen pumps and botulinum toxin injections. Her current research interests include multiple sclerosis clinical trials, emerging therapies for MS, neuromyelitis optica, cognitive dysfunction in MS and factors affecting quality of life in MS.


Other Members of our Healthcare Team Include:

All healthcare professionals at the OSU Multiple Sclerosis Center who are involved in the treatment of MS meet the criteria set by their professional organizations and all are certified or licensed by their respective organizations, including three Certified Multiple Sclerosis Nurses.


Clinical Staff:
NPs: Mary Pat Bartoszek, CNP and Colleen O’Connell, CNP
MS Clinic Nurse: Donna Ensign, RN
MS Social Worker: Mary Jane Williams, LSW Clinical Trial Coordinators: Misty Regula, Erin Marshall and
Jessica DeJesus
Infusion Center: Lori Atwood, RN
Medical Assistants: Leigh Ann Shinnick, Jessica Spencer, Ashley Powell and Christy Howell


Research Staff:
Cathy Jackson, research assistant
Lisa Hafer, research associate 2
Cindy Overholts, clinical research assistant​​​​​​​​​​​

Ohio State developed the first Multiple Sclerosis Center in Ohio, one of the largest programs for MS care in the country. Schedule an appointment with Ohio State's multiple sclerosis experts. Call 614-293-4969.