Published online by Cambridge University Press: 05 March 2022
Parkinson’s disease (PD) is traditionally characterized by its motor symptoms of tremors, bradykinesia, rigidity, and postural instability [1]. However, it is now recognized that non-motor symptoms including neuropsychiatric manifestations are frequently present in PD, and their onset not only could precede motor symptoms but is also associated with increased dysfunction and reduced quality of life [2–4]. This chapter focuses on depression, the most commonly seen mood disorder in PD, and provides an overview of the epidemiology, clinical symptoms, proposed pathophysiology, diagnostic tools, and treatment options available for depression in PD.
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