Cognitive impairment (CI) is a characteristic non-motor feature of Parkinson disease (PD)
that poses a severe burden on the patients and caregivers, yet relatively little is known about …

Parkinson's disease (PD) is a neurodegenerative disease with an increased morbidity. The
pathogenesis PD has not been fully elucidated, and whatever mechanism is involved, it …

Background Freezing of gait (FOG), is associated with impairment of different cognitive
functions. Previous studies hypothesized that FOG may be due to a loss of automaticity …

Objective Among the disturbing motor symptoms in Parkinson's disease (PD), freezing of
gait (FOG) stands out as one of the most severe challenges. It typically arises during the …

Background Stratal dopamine depletion contributes to both motor and non-motor symptoms
of patients with Parkinson's disease (PD). The objective of current study is to explore …

Cognitive impairment (CI) is one of the most prominent non-motor symptoms in Parkinson's
disease (PD). How brain network abnormalities contribute to CI in PD patients remain …

Backgrounds and objectives Severe hyposmia (SH) is a prodromal symptom of dementia
associated with Parkinson's disease (PD) caused by Lewy bodies deposited in the limbic …

The understanding of pathophysiological mechanisms underlying symptom severity and
brain network aberrations in Parkinson's disease (PD) can offer objective, theoretically …

Introduction: The reaction times of Parkinson's disease (PD) patients in dual-task accuracy
tests depend on their cognitive ability. Objective: The non-disabled PD patients' cognitive …

Procedural memory can be separated into an anterograde and a retrograde component. The
anterograde procedural memory involves the acquisition of new skills, whereas the ability to …