Background Clinical diagnostic accuracy of Parkinson's disease (PD) remains suboptimal.
Changes in disease concept may have improved clinical diagnostic accuracy in the past …

We correlated the clinical features with pathological findings in an autopsy series of cases of
incident parkinsonism. We used the medical records‐linkage system of the Rochester …

New criteria for Parkinson's disease‐associated psychosis (PDAP) were recently proposed
by a NINDS‐NIMH working group. We assessed 116 consecutive unselected outpatients …

The clinical heterogeneity of Parkinson's disease (PD) may point at the existence of
subtypes. Because subtypes likely reflect distinct underlying etiologies, their identification …

Nonmotor symptoms (NMS) are common in patients with established Parkinson's disease
(PD) and have a major impact upon quality of life. We investigated the significance of NMS …

Evidence suggests that both motor and nonmotor symptoms contribute to health status in
Parkinson's disease. Less clear is how much change in health status can be expected if …

It is frequently assumed that idiopathic Parkinson's disease starts with several nonmotor
symptoms and signs, but the evidence for this stage in the disease process is of variable …

Parkinson's disease (PD) can be symptomatically controlled with standard treatments;
however, after a few years, this response typically declines and most patients develop motor …

Although Parkinson's disease (PD) has been classically defined as a motor disorder, a
range of non-motor symptoms (NMS) including cognitive, mood, autonomic and sleep …

There are no standardized diagnostic criteria for psychosis associated with Parkinson's
disease (PDPsy). As part of an NIH sponsored workshop, we reviewed the existing literature …