Dementia has been increasingly more recognized to be a common feature in patients with
Parkinson's disease (PD), especially in old age. Specific criteria for the clinical diagnosis of …

Parkinson disease (PD) is an age-related neurodegenerative disorder that affects as many
as 1–2% of persons aged 60 years and older. With the aging of the population, the …

ContextFrequent participation in cognitively stimulating activities has been hypothesized to
reduce risk of Alzheimer disease (AD), but prospective data regarding an association are …

A preceding article described the clinical features of Parkinson's disease dementia (PD‐D)
and proposed clinical diagnostic criteria for “probable” and “possible” PD‐D. The main focus …

Objective: To determine the frequency and pattern of cognitive dysfunction in patients with
newly diagnosed Parkinson disease (PD) and to identify its demographic and clinical …

Background Severe, refractory obsessive–compulsive disorder (OCD) is a disabling
condition. Stimulation of the subthalamic nucleus, a procedure that is already validated for …

Impairment of executive function (EF) is commonly reported as a feature of PD. However, the
exact pattern of executive impairment remains unclear. Also, there is an ongoing discussion …

Until recently, quantitative studies of walking have typically focused on properties of a typical
or average stride, ignoring the stride-to-stride fluctuations and considering these fluctuations …

Background: Cognitive abilities of older persons range from normal, to mild cognitive
impairment, to dementia. Few large longitudinal studies have compared the natural history …

The authors examined change in cognitive abilities in older Catholic clergy members. For up
to 6 years, participants underwent annual clinical evaluations, which included a battery of …