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  • Nicki Niemann, MD

    Nicki Niemann, MD, is a neurologist in the Muhammad Ali Parkinson Center and an assistant professor of neurology at Barrow Neurological Institute. He is board certified in neurology by the American Board of Psychiatry and Neurology.

    Dr. Niemann’s expertise includes the diagnosis and management of Parkinson’s disease and other movement disorders. He is a member of the American Academy of Neurology and the International Parkinson and Movement Disorder Society.

    Dr. Niemann earned his medical degree from the University of Copenhagen in Denmark. He completed his neurology residency and a fellowship in movement disorders at Baylor College of Medicine in Houston.

    Dr. Niemann’s research interests include clinical trials and translational research in Parkinson’s disease and other movement disorders, genetics of Parkinson’s disease, and novel applications of botulinum toxin.

    To request an appointment with Dr. Niemann, please call (602) 406-6262.

    Paul MacDonald, MD

    Paul MacDonald, MD, is a neurologist in the Stroke Program and an Associate Professor of Neurology at Barrow Neurological Institute. He is board certified in neurology by the American Board of Psychiatry and Neurology, with subspecialty certifications in vascular neurology and clinical neurophysiology.

    Dr. MacDonald’s expertise includes the diagnosis and treatment of stroke and other neurovascular disorders. He is a member of the American Academy of Neurology and the American Heart Association.

    Dr. MacDonald earned his medical degree from the University of South Florida Morsani College of Medicine in Tampa. He completed his neurology residency at Emory University, where he also trained as a fellow in clinical neurophysiology with an emphasis on neuromuscular disease. He later completed a fellowship in neurovascular disease at the University of Florida in Gainesville.

    To request an appointment with Dr. MacDonald, please call (602) 406-6262.

    Meredith Wicklund, MD

    Meredith Wicklund, MD, is a neurologist in the Alzheimer’s and Memory Disorders Program and an assistant professor of neurology at Barrow Neurological Institute. She is board certified in neurology by the American Board of Psychiatry and Neurology and in behavioral neurology and neuropsychiatry by the United Council for Neurologic Subspecialties.

    Dr. Wicklund’s expertise includes evaluating and treating dementias and neurodegenerative disorders, such as Alzheimer’s disease, Lewy body dementia, frontotemporal dementia, primary progressive aphasia, and corticobasal syndrome. She is a member of the American Academy of Neurology and the Alzheimer’s Association International Society to Advance Alzheimer’s Research and Treatment.

    Dr. Wicklund earned her medical degree from the University of Illinois College of Medicine at Rockford. She completed her neurology residency and a fellowship in behavioral neurology at Mayo Clinic in Rochester, Minnesota.

    Dr. Wicklund’s research interests include understanding the clinical, neuropsychological, and imaging features of dementias and neurodegenerative diseases. She also studies investigational drugs and other therapeutics for these diseases.

    For more information or to request an appointment with Dr. Wicklund, please call (602) 406-6262.

    Lynn Stuart Ashby, MD

    Lynn Stuart Ashby, MD, is a neurologist in the Stroke Program and a professor of neurology at Barrow Neurological Institute. She is board certified in neurology by the American Board of Psychiatry and Neurology.

    Dr. Ashby’s clinical focus is the care of patients with neurovascular disorders, including stroke, transient ischemic attack (TIA), and syncope. She is a member of the American Academy of Neurology, the American Society of Clinical Oncology, and the Society for Neuro-Oncology.

    Dr. Ashby earned her master’s and medical degrees from Northwestern University in Chicago. She completed her neurology residency and a fellowship in neuro-oncology at Barrow Neurological Institute.

    Dr. Ashby is a sub-investigator for clinical trials being conducted in the Stroke Program. Her research interests are in the medical and interventional treatment of patients with acute stroke.

    To request an appointment with Dr. Ashby, please call (602) 406-6262.

    About Barrow Neurological Institute

    Since our doors opened as a regional specialty center in 1962, we have grown into one of the premier destinations in the world for neurology and neurosurgery. Our experienced, highly skilled, and comprehensive team of neurological specialists can provide you with a complete spectrum of care–from diagnosis through outpatient neurorehabilitation–under one roof. Barrow Neurological Institute: Discover. Educate. Heal.