TY - CHAP M1 - Book, Section TI - Parkinson Disease & Essential Tremor A1 - Galifianakis, Nicholas B. A1 - Ghazinouri, A. A2 - Walter, Louise C. A2 - Chang, Anna A2 - Chen, Pei A2 - Harper, G. Michael A2 - Rivera, Josette A2 - Conant, Rebecca A2 - Lo, Daphne A2 - Yukawa, Michi PY - 2021 T2 - Current Diagnosis & Treatment Geriatrics, 3e 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. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/04/19 UR - accessmedicine.mhmedical.com/content.aspx?aid=1180015902 ER -