Personal profile
Biography
Simon Lewis is a Neurologist who has sub-specialised in degenerative diseases of the brain including Parkinson’s Disease, Dementia with Lewy Bodies and related conditions. He works as a Clinical Academic seeing patients and conducting research to improve our understanding and treatment of these brain disorders.
His research program is intentionally broad but highly integrated and directed towards improving the lives of people living with neurodegenerative brain diseases. He has previously utilised a range of novel techniques including neuroimaging (brain scanning), neurophysiology (e.g. recording brain waves), neuropathology (leads the NSW Movement Disorders Brain Donor Program), chronobiology (e.g. measuring melatonin), neurogenetics and other peripheral biomarkers from blood tests.
These approaches have been used to evaluate a variety of symptoms including dementia, gait disturbance, sleep-wake problems and hallucinations. Some of these approaches are targeting patients who are troubled by specific symptoms, whereas other work is focused on predicting who will develop degenerative diseases at the earliest possible point in time so as to increase our chances of preventing, slowing or curing these conditions. To this end, he is currently conducting a series of disease modifying drug trials in patients who have been diagnosed with degenerative brain disease. Furthermore, he also trains and mentors junior doctors, nurses and a range of research students. He invests in this capacity building to train the next generation of clinicians and researchers.
His research has attracted significant funding from a range of sources including the National Health and Medical Research Council (NHMRC), the Australian Research Council (ARC) and the international Michael J Fox Foundation. Send him a message, if you’d like to learn more about his work.
The Parkinson’s Disease Research clinic, Macquarie University
The Parkinson’s Disease Research clinic led by Professor Simon Lewis, strives to develop better patient care and family support for people living with Parkinson’s Disease and related disorders. Our research investigates the causes underlying many of the problems faced by people living with these conditions. We hope a better understanding of these symptoms will improve quality of life. In addition, we have specific studies addressing novel treatment and diagnostic approaches.
Our studies rely on people living with Parkinson’s Disease and related conditions. We are currently running studies in freezing of gait, hallucinations and predicting disease and clinical trials targeting specific symptoms and disease progression. We are also the first point of contact for registering interest in the New South Wales Movement Disorders Brain Donor Program.
Our research program is always evolving so please contact us to find out more about our research: [email protected]
Research student supervision
We always welcome enquiries from enthusiastic researchers. Currently we would particularly welcome interest from people with a variety of skills including but not limited to: Psychology, clinical medicine, neuroimaging, engineering and neurophysiology. Please feel free to contact us if you would like to know more.
External positions
Chair of the International Consortium for Freezing of Gait
2024 → …
Clinical Lead for the Australian Parkinson's Mission
2019 → …
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(Usyd led): Single-dose study to determine the effect of guanfacine on cognition and brain activity in Parkinson’s disease
O'Callaghan, C. (Chief Investigator), Lewis, S. (Primary Chief Investigator), West, S. (Research Coordinator), Breakspear, M. (Associate Investigator), Harvey, C. (Research Coordinator) & Mendes Osorio, L. (Other)
4/11/25 → 31/12/27
Project: Research
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(Garvan led): The Australian Parkinson's Mission (APM002) Sponsorship Record
Cooper, A. A. (Chief Investigator), Lewis, S. (Primary Chief Investigator), Chung, R. (Other), Furlong, S. (Other), West, S. (Other), Harvey, C. (Other) & Mendes Osorio, L. (Other)
27/06/25 → 30/06/27
Project: Research
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(Paris Brain Institute (ICM) led): Evaluation of neuromelanin-sensitive, quantitative susceptibility mapping and free water imaging as biomarkers of nigral dopaminergic dysfunction
Lehericy, S. (Chief Investigator), Helmich, R. C. (Chief Investigator), Dagher, A. (Chief Investigator), Rahayel, S. (Chief Investigator), Poline, J.-B. (Chief Investigator), Thaler, A. (Chief Investigator), Bruggemann, N. (Chief Investigator), Lewis, S. (Primary Chief Investigator) & Mendes Osorio, L. (Other)
16/06/25 → 15/06/27
Project: Research
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(Radboud UMC led): Pharmacologically modulating the noradrenergic arousal system to reduce freezing of gait in Parkinson’s disease: a multi-center and multi-modal approach
Nonnekes, J. (Chief Investigator), Ehgoetz Martens, K. A. (Chief Investigator), Lewis, S. (Primary Chief Investigator), Harvey, C. (Other), West, S. (Other) & Aoun, K. (Clinical Trial Unit Staff)
1/01/25 → 31/12/27
Project: Research
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SEL003: A Phase 2 Randomised Controlled Trial of Sodium Selenate as a Disease Modifying Treatment for Probable Progressive Supranuclear Palsy
O'Brian, T. (Chief Investigator), Lewis, S. (Primary Chief Investigator), West, S. (Other) & Harvey, C. (Other)
15/08/24 → 13/03/29
Project: Research
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Aberrant beta-band network alteration preceding freezing of gait in Parkinson's disease
Tian, Y., Matar, E., Berkovsky, S. & Lewis, S. J. G., 27 Feb 2026, (E-pub ahead of print) In: Movement Disorders. 10 p.Research output: Contribution to journal › Article › peer-review
Open Access -
An updated definition of freezing of gait
Gilat, M., Nonnekes, J., Factor, S. A., Bloem, B. R., Nutt, J. G., Giladi, N., Hallett, M., Nieuwboer, A., Horak, F. B., Weiss, D., Cubo, E., Zoetewei, D., Moreau, C., Jeon, B., Virmani, T., Hausdorff, J. M., Fasano, A., Lewis, S. J. G. & International Consortium for Freezing of Gait, Mar 2026, In: Nature Reviews Neurology. 22, 3, p. 172-181 10 p.Research output: Contribution to journal › Article › peer-review
2 Link opens in a new tab Citations (Scopus) -
Basal forebrain volume predicts disease conversion in prodromal synucleinopathy
Churchill, L., Konuri, A., Ignatavicius, A., Anderson, J., Lewis, S. J. G. & Matar, E., Jan 2026, In: Movement Disorders Clinical Practice. 13, 1, p. 198-207 10 p.Research output: Contribution to journal › Article › peer-review
Open AccessFile2 Link opens in a new tab Citations (Scopus) -
Comparing phenotypic features between Parkinson’s disease dementia and dementia with Lewy bodies
Gunawardana, C. W., Burke, P. G. R., Ignatavicius, A., Matar, E. & Lewis, S. J. G., 10 Feb 2026, In: Journal of Neurology. 273, 2, p. 1-8 8 p., 132.Research output: Contribution to journal › Article › peer-review
Open AccessFile -
Differentiating gait behaviors between early-stage dementia with Lewy bodies and Parkinson's disease
Mathias, K. D. A., Casagrande Pinto, A. E., Martins, L. E., Matar, E., Phillips, J. R., Lewis, S. J. G. & Ehgoetz Martens, K. A., Feb 2026, In: Gait and Posture. 124, p. 1-9 9 p., 110034.Research output: Contribution to journal › Article › peer-review
Open AccessFile3 Downloads (Pure)