The burden of comorbidity in Parkinson's disease (PD) remains unclear. All Olmsted County,
Minnesota, residents with incident PD in 1976–1995 (n= 197) plus one age‐and sex …

Parkinson disease (PD) is usually accompanied by numerous nonmotor symptoms (NMS),
such as neuropsychiatric symptoms, sleep disorders, autonomic dysfunctions, and sensory …

A cross‐sectional study of the profile of psychiatric symptoms and their relationships to
medications, executive performance, and excessive daytime somnolence (EDS) was …

To investigate the duration of a prodromal phase before the onset of the classic symptoms of
idiopathic Parkinson's disease the authors conducted a retrospective case control study of …

With the growing awareness of the presence of non-motor symptoms in Parkinson's disease
(PD) has come the realization that these non-motor features play a tremendously important …

We performed a cross‐sectional study of 82 Chinese patients with Parkinson's disease (PD)
enrolled during an 18‐month period using a clinical interview to assess the prevalence of …

Mood disorders are the most common psychiatric problem associated with Parkinson's
disease (PD), and have a negative impact on disability and quality of life. Accurate diagnosis …

There is controversy regarding the definition and characteristics of mild cognitive impairment
in Parkinson's disease. The Movement Disorder Society commissioned a Task Force to …

Parkinson's disease (PD) is most often considered a disorder of movement. Whereas
bradykinesia, rigidity, tremor, and postural instability result in disability, nonmotor …

The neurodegenerative process is well established in Parkinson patients presenting to a
physician with early motor signs. There is increasing evidence that a variety of nonmotor …