Results 91 to 100 of about 13,685 (235)

Regional changes in cerebral blood flow between the upright and supine posture and over 3 days of bed rest

Experimental Physiology, EarlyView.
Abstract A reduction in cerebral blood flow (CBF) has been observed during spaceflight and bed rest. We aimed to examine the magnitude and regional heterogeneity of the decrease in CBF during bed rest compared to posture changes on Earth. Seventeen participants (age, 29 ± 9 years, 7 females) were studied in the upright and supine posture and over 3 ...
Carmen Possnig, Kyohei Marume, Gautam Babu, Sylvan L. J. E. Janssen, Christopher M. Hearon Jr, Katrin A. Dias, Satyam Sarma, Justin S. Lawley, Benjamin D. Levine   +8 more
wiley   +1 more source

Arterial baroreflex regulation of cerebral blood flow in humans

Journal of Physical Fitness and Sports Medicine, 2012
The arterial baroreflex plays an essential role in the short-term regulation of arterial blood pressure, and thus helps ensure that the vital organs are adequately perfused.
Shigehiko Ogoh, Ai Hirasawa, James P. Fisher   +2 more
doaj   +1 more source

Changes in Hemodynamic Responses in Chronic Stroke Survivors Do Not Affect fMRI Signal Detection in a Block Experimental Design [PDF]

, 2013
The use of canonical functions to model BOLD-fMRI data in people post-stroke may lead to inaccurate descriptions of task-related brain activity. The purpose of this study was to determine whether the spatiotemporal profile of hemodynamic responses (HDRs)
Promjunyakul, Nutta-on, Schindler-Ivens, Sheila, Schmit, Brian D.   +2 more
core   +2 more sources

The therapeutic role of exercise training during menopause for reducing vascular disease

Experimental Physiology, EarlyView.
Abstract Menopause marks a major milestone in female reproductive ageing. It is characterized by the cessation of ovarian function and a concomitant decline in hormones such as oestradiol. Subsequently, females undergoing menopausal transition experience a progressive increase in cardiovascular and cerebrovascular disease risk.
Conan L. H. Shing, Bert Bond, Kerrie L. Moreau, Jeff S. Coombes, Jenna L. Taylor   +4 more
wiley   +1 more source

Individuals with persisting post‐concussion symptoms with physiological subtype demonstrate altered cardiovascular and autonomic responses to face cooling

Experimental Physiology, EarlyView.
Abstract Individuals with persisting post‐concussion symptoms with physiological subtype (PPCS‐P) demonstrate exercise intolerance due to exacerbation of concussion‐like symptoms during incremental exercise. We tested the hypothesis that individuals with PPCS‐P (n = 12) would have a blunted cardiac autonomic response to face cooling compared to healthy
Phillip J. Wallace, Steve Lidstone, Josh G. Nowlan, Johnathan Ljubanovich, Brandon J. McKinlay, Stephen A. Klassen, Stephen S. Cheung   +6 more
wiley   +1 more source

A comparison of cerebral vasomotor reactivity in diabetic and nondiabetic Iranian patients

Journal of Research in Medical Sciences, 2010
Background: Cerebral microangiopathy is one of the most important complications in diabetes. It may interfere with cerebral vasomotor reactivity (VMR) which may lead to disability, stroke or even death.
Mehdi Moghaddasi, Mansoureh Mamarabadi, Amir Hosein Habibi   +2 more
doaj  

Linking dynamic cerebral autoregulation and inhibitory executive function: Role of modifiable behaviours

Experimental Physiology, EarlyView.
Abstract Dynamic cerebral autoregulation (dCA) stabilises cerebral blood flow (CBF) against rapid fluctuations in perfusion pressure and may serve as a key physiological mediator of cognitive function. Inhibitory executive function, a core domain essential for goal‐directed behaviour, is influenced by modifiable lifestyle factors such as physical ...
Hayato Tsukamoto, Damian M. Bailey
wiley   +1 more source

Obstructive sleep apnea: the state of cerebral hemodynamic reserve

Alʹmanah Kliničeskoj Mediciny, 2016
Background: Individuals with obstructive  sleep apnea syndrome (OSAS) have an increased risk of disabling disorders of the cardiovascular system, including  stroke.
N. L. Kunelskaya, M. V. Tardov, A. V. Klyasov, Z. O. Zaoeva, D. I. Burchakov   +4 more
doaj   +1 more source

Increases in skin perfusion and blood oxygen in the non‐exercising human limbs during exercise in the heat: Implications for control of circulation

Experimental Physiology, EarlyView.
Abstract Blood flow in the inactive limb tissues and skin is widely thought to decline during incremental exercise to exhaustion due to augmented sympathoadrenal vasoconstrictor activity, but direct evidence to support this view is lacking. Here, we investigated the inactive‐forearm haemodynamic (Q̇forearm${\dot{Q}}_{\mathrm{forearm}}$) and oxygenation
Steven J. Trangmar, José González‐Alonso   +1 more
wiley   +1 more source

A preliminary study of brain macrovascular reactivity in impaired glucose tolerance and type-2 diabetes: Quantitative internal carotid artery blood flow using magnetic resonance phase contrast angiography. [PDF]

, 2016
OBJECTIVE: The aims of this study were (1) to examine cerebrovascular autoregulation in subjects with impaired glucose tolerance and type 2 diabetes and (2) to clarify whether cardiovascular autonomic nerve function is associated with abnormal ...
Boland, E., Gandhi, R., Griffiths, P.D., Hughes, T., Marques, J., Reeves, J., Selvarajah, D., Tesfaye, S., Wilkinson, I.D.   +8 more
core   +1 more source