RT Book, Section A1 Galifianakis, Nicholas B. A1 Ghazinouri, A. A2 Williams, Brie A. A2 Chang, Anna A2 Ahalt, Cyrus A2 Chen, Helen A2 Conant, Rebecca A2 Landefeld, C. Seth A2 Ritchie, Christine A2 Yukawa, Michi SR Print(0) ID 1100066363 T1 Parkinson Disease & Essential Tremor T2 Current Diagnosis & Treatment: Geriatrics, 2e YR 2014 FD 2014 PB McGraw-Hill Education PP New York, NY SN 978-0-07-179208-0 LK accessmedicine.mhmedical.com/content.aspx?aid=1100066363 RD 2024/04/23 AB Essentials of DiagnosisAny combination of resting tremor, bradykinesia, rigidity, and postural instability (late feature). Bradykinesia is a required feature for diagnosis.Asymmetric onset is the norm.Responds well to levodopa in most cases.Diagnostic accuracy improves with observation over time.