Dementia is a frequent problem encountered in advanced stages of Parkinson disease (PD).
In recent years, research has focused on the pre-dementia stages of cognitive impairment in …

Mild cognitive impairment associated with Parkinson's disease (PD) is a risk factor for the
development of dementia. Despite the importance of early identification of mild cognitive …

Patients with Parkinson's disease have a number of specific visual disturbances. These
include changes in colour vision and contrast sensitivity and difficulties with complex visual …

The brain is a large-scale complex network whose workings rely on the interaction between
its various regions. In the past few years, the organization of the human brain network has …

It is well known that most brain disorders are complex diseases, such as Alzheimer's
disease (AD) and schizophrenia (SCZ). In general, brain regions and their interactions can …

Parkinson's disease (PD) and dementia with Lewy bodies (DLB) share clinical and
pathological similarities. The defining features are motor parkinsonism and cognitive …

Cognitive decline is one of the most frequent and disabling nonmotor features of Parkinson's
disease. Around 30% of patients with Parkinson's disease experience mild cognitive …

Parkinson's disease (PD) is a neurodegenerative disorder with dysfunction in cortices as
well as white matter (WM) tracts. While the changes to WM structure have been extensively …

Recent findings suggest that Alzheimer's disease (AD) is a disconnection syndrome
characterized by abnormalities in large-scale networks. However, the alterations that occur …

Non-motor symptoms in Parkinson's disease (PD) include ocular, visuoperceptive, and
visuospatial impairments, which can occur as a result of the underlying neurodegenerative …