Abstract
The frequency of depression in patients with Parkinson's disease is approximately 30-40%. Depression has a significantly negative impact on the QOL in Parkinson's disease patients. It leads to the worsening of tremors and frozen gait without disease progression and decreases the patient's motivation to participate in rehabilitation. The distinguishing feature of depression in patients with Parkinson's disease is that guilt, self-blame and suicidal ideation are rarely seen compared to that observed in patients with major depression. Depression can occur in the pre-motor, diagnostic and advanced stages of Parkinson's disease. In particular, patients with wearing-off symptoms are apt to develop anxiety. As for treatment, it is very important to optimize dopamine replacement therapy. Antiparkinsonian drugs may have beneficial effects not only on the motor symptoms of the disease, but also the patient's mood. Cognitive behavioral therapy (CBT) and peer counseling may also be beneficial.
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