Results 121 to 130 of about 57,963 (312)

Sex differences in loop gain measured via superimposed end‐expiratory breath holds and inspired steady‐state hypoxia

open access: yesExperimental Physiology, EarlyView.
Abstract Acute low oxygen exposure (hypoxia) elicits a hypoxic ventilatory response (HVR), which increases ventilation and mitigates hypoxaemia. During sustained exposure to hypoxia, ventilatory acclimatization increases peripheral chemoreflex (HVR) sensitivity or chemoreflex loop gain (LG).
Benjamin W. L. MacKenzie   +3 more
wiley   +1 more source

Uncovering the impact of the cardiovascular system on cerebrovascular health using MRI

open access: yesExperimental Physiology, EarlyView.
Abstract Human cerebrovasculature is finely tuned to enable local changes in blood flow to meet the brain's demands, whilst protecting the brain from systemic changes in blood pressure, both acutely during a heartbeat and chronically over time. This review summarises cerebrovascular structure and function, their role in disease and neurodegeneration ...
Ian D. Driver, Kevin Murphy
wiley   +1 more source

Longitudinal Changes in Peripheral and Alveolar Monocyte and Inflammatory Biomarkers are Distinct in Hypercapnia Patients Following Pulmonary Sepsis-Induced ARDS

open access: yesJournal of Inflammation Research
Jie Zhao,1,* Yuanyuan Ji,2,* Baozhu Li,3,* Ke Yang,1 Qi Sun,1 Tao Ma,3 Keliang Xie1 1Department of Critical Care Medicine, Tianjin Medical University General Hospital, Tianjin, People’s Republic of China; 2Tianjin Medical University, Tianjin,
Zhao J   +6 more
doaj  

Optimizing cerebrovascular endothelial health through shear stress modulation

open access: yesExperimental Physiology, EarlyView.
Abstract The endothelium plays a pivotal role in regulating cerebrovascular blood flow, and its dysfunction increases the risk of cerebrovascular disease. Endothelial shear stress, a primary mechanical stimulus for endothelial nitric oxide production, is a key modulator of vascular adaptation.
Erika Iwamoto   +2 more
wiley   +1 more source

Acute exercise‐induced improvements in cognition: Role of cerebral blood flow and metabolism

open access: yesExperimental Physiology, EarlyView.
Abstract Physical activity is widely recognized for its ability to promote brain health, with acute exercise transiently enhancing cognition and long‐term training attenuating cognitive decline. However, the mechanisms underlying these benefits remain incompletely understood.
Takeshi Hashimoto, Shigehiko Ogoh
wiley   +1 more source

HYPERCAPNIA

open access: yesNihon Naika Gakkai Zasshi, 1964
S. AOYAMA, T. SATAKE
openaire   +4 more sources

Modulation of cerebral blood flow and cognition by hyperthermia and hypoxia: An electroencephalographic event‐related potentials perspective

open access: yesExperimental Physiology, EarlyView.
Abstract Cerebral blood flow (CBF) is essential for sustaining neuronal metabolism and cognitive performance; however, the precise relationship between perfusion and cognition remains unclear. Although ageing and disease are associated with progressive declines in CBF and cognitive impairment, the acute effects of altered CBF under environmental ...
Hiroki Nakata   +2 more
wiley   +1 more source

Hypercapnia and lung function parameters in chronic obstructive pulmonary disease

open access: yesBMC Pulmonary Medicine
Background In advanced chronic obstructive pulmonary disease (COPD), hypercapnia may occur due to severe bronchial obstruction with lung hyperinflation.
Lukas Gernhold   +5 more
doaj   +1 more source

Widespread depolarization during expiration: A source of respiratory drive? [PDF]

open access: yes, 2014
Respiration influences various pacemakers and rhythms of the body during inspiration and expiration but the underlying mechanisms are relatively unknown.
Barnes, Vernon A.   +3 more
core  

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