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Movement Disorders Specialist with subspecialty training in dystonia. Expert in the administration of botulinum toxin injections and deep brain stimulation programming.
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Master in Medical Education. Program Director of the Movement Disorders Fellowship at the University of Pennsylvania's Parkinson's Disease and Movement Disorders Center.
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Clinical trialist in Movement Disorders.
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Selected Publications
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Thomsen M, Ott F, Loens S, Kilic-Berkmen G, Tan AH, Lim SY, Lohmann E, Schröder KM, Ipsen L, Nothacker LA, Welzel L, Rudnik AS, Hinrichs F, Odorfer T, Zeuner KE, Schumann F, Kühn AA, Zittel S, Moeller M, Pfister R, Kamm C, Lang AE, Tay YW, de Almeida Marcelino AL, Vidailhet M, Roze E, Perlmutter JS, Feuerstein JS, Fung VSC, Chang F, Barbano RL, Bellows S, Wagle Shukla AA, Espay AJ, LeDoux MS, Berman BD, Reich S, Deik A, Franke A, Wittig M, Franzenburg S, Volkmann J, Brüggemann N, Jinnah HA, Bäumer T, Klein C, Busch H, Lohmann K. : Genetic Diversity and Expanded Phenotypes in Dystonia: Insights From Large-Scale Exome Sequencing. Ann Clin Transl Neurol 12(8): 1648-1659, Aug 2025 Notes: doi: 10.1002/acn3.70100. Epub 2025 Jun 18.
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Deik A, Aamodt W, Cadet C, Lasker A, Oliver A, Spindler M, Tropea T, Vaswani P, Siderowf A: An open-label pilot study to examine the safety, tolerability and efficacy of deutetrabenazine in isolated dystonia. Movement Disorders Clinical Practice. Wiley, 12(4): 1-6, Jan 2025 Notes: http://doi.org/10.1002/mdc3.14327.
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Tropea TF, Hartstone W, Amari N, Baum D, Rick J, Suh E, Zhang H, Paul RA, Han N, Zack R, Brody EM, Albuja I, James J, Spindler M, Deik A, Aamodt WW, Dahodwala N, Hamedani A, Lasker A, Hurtig H, Stern M, Weintraub D, Vaswani P, Willis AW, Siderowf A, Xie SX, Van Deerlin V, Chen-Plotkin AS: Genetic and phenotypic characterization of Parkinson's disease at the clinic-wide level. NPJ Parkinsons Dis 10(1): 97, May 2024 Notes: doi: 10.1038/s41531-024-00690-6.
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Beylergil SB, Mukunda KN, Elkasaby M, Perlmutter JS, Factor S, Bäumer T, Feurestein J, Shelton E, Bellows S, Jankovic J, Mahajan A, Wamer-Rosen T, Reich SG, Wagle Shukla A, Malady I, Espay A, Duque K, LeDoux MS, Saunders-Pullman R, Leaver K, Frank S, Pantelyat A, Fung V, Pirio Richardson S, Berman B, Stover N, Deik A, Ondo W, Groth C, Jinnah HA and Shaikh AG.: Tremor in cervical dystonia. Dystonia Page: 11309, Mar 2024 Notes: doi: 10.3389/dyst.2024.11309.
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Baldwin A, Copeland J, Azage M, Dratch L, Johnson K, Paul RA, Amado DA, Baer M, Deik A, Elman LB, Guo M, Hamedani AG, Irwin DJ, Lasker A, Orthmann-Murphy J, Quinn CC, Tropea TF, Scherer SS, Shinohara RT, Hamilton RH, Ellis CA. : Disparities in Genetic Testing for Neurologic Disorders. Neurology 102(6): e209161, Mar 2024 Notes: doi: 10.1212/WNL.0000000000209161. Epub 2024 Mar 6.
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Arezoumandan S, Cousins KAQ, Ohm DT, Lowe M, Chen M, Gee J, Phillips JS, McMillan CT, Luk KC, Deik A, Spindler MA, Tropea TF, Weintraub D, Wolk DA, Grossman M, Lee V, Chen-Plotkin AS, Lee EB, Irwin DJ.: Tau maturation in the clinicopathological spectrum of Lewy body and Alzheimer's disease. Ann Clin Transl Neurol 11(3): 673-685, Jan 2024 Notes: doi: 10.1002/acn3.51988.
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Younce JR, Cascella RH, Berman BD, Jinnah HA, Bellows ST, Feuerstein J, Shukla AW, Mahajan A, Chang F, Duque KR, Reich S, Richardson SP, Deik A, Stover N, Luna JM, Norris SA: Anatomical categorization of isolated non-focal dystonia: novel and existing patterns using a data-driven approach Dystonia Jun 2023 Notes: DOI: 10.3389/dyst.2023.11305.
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Deik A: Potential Benefits and Perils of Incorporating ChatGPT to the Movement Disorders Clinic. J Mov Disord 16(2): 158-162, May 2023 Notes: https://doi.org/10.14802/jmd.23072.
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Cousins KA, Irwin DJ, Chen-Plotkin A, Shaw LM, Arezoumandan S, Lee EB, Wolk DA, Weintraub D, Spindler M, Deik A, Grossman M, Tropea TF: Plasma GFAP associates with secondary Alzheimer’s pathology in Lewy body disease. Annals of Clinical and Translational Neurology 10(5): 802-813, Mar 2023.
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Shellikeri S, Cho S, Cousins KAQ, Liberman M, Howard E, Balganorth Y, Weintraub D, Spindler M, Deik A, Lee EB, Trojanowski JQ, Irwin D, Wolk D, Grossman M, Nevler N.: Natural speech markers of Alzheimer's disease co-pathology in Lewy body dementias. Parkinsonism & related disorders 6(102): 94-100, Aug 2022 Notes: doi: 10.1016/j.parkreldis.2022.07.023. Online ahead of print.
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Last updated: 12/18/2025
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The Trustees of the University of Pennsylvania
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