Small-caliber cerebral vessels change their diameters in response to alterations of key
metabolite concentrations such as carbon dioxide or oxygen. This phenomenon, termed the …

Orthostatic hypotension (OH) is one of the commonly occurring nonmotor symptoms in
patients with idiopathic Parkinson's disease (IPD) and atypical parkinsonism (AP). We aimed …

Orthostatic hypotension (OH) is a frequent nonmotor feature of Parkinson's disease (PD),
and its occurrence has been associated with cognitive impairment. The underlying …

Background Orthostatic hypotension (OH) and cognitive impairment are common non-motor
symptoms of Parkinson's disease (PD). This study aimed to investigate whether impaired …

Cerebral blood flow dysregulation is often associated with hypertension. We hypothesized
that a beetroot juice (BRJ) treatment could decrease blood pressure and cerebrovascular …

Background Orthostatic hypotension and cognitive impairment are two non-motor attributes
of Lewy body spectrum disorders that impact independence. This proof-of-concept study …

Parkinson's disease (PD) is a common neurodegenerative disorder, yet little is known about
cerebral haemodynamics in this patient population. Previous studies assessing dynamic …

Orthostatic hypotension (OH) is a common condition, particularly in patients with α-
synucleinopathies such as Parkinson's disease, and has a significant impact on activities of …

Significance Combining near-infrared spectroscopy (NIRS) and diffuse correlation
spectroscopy (DCS) allows for quantifying cerebral blood volume, flow, and oxygenation …

Objective This study aimed to assess any correlation between serum levels of homocysteine
(Hcy) and markers of cerebral hemodynamics, endothelial dysfunction, and cognition …