Results 121 to 130 of about 396,292 (302)

Influence of facial cooling on carotid body tonic activity and sensitivity

Experimental Physiology, EarlyView.
Abstract Facial cooling can increase ventilation and augment the hypoxic ventilatory response. Whole body cooling increases both carotid body tonic activity and sensitivity; however, whether isolated facial cooling induces similar carotid body hyperexcitability was unknown.
Robyn Morley, Liam D. Corr, Elliott J. Jenkins, Joseph A. Killick, Travis D. Gibbons, Joshua C. Tremblay   +5 more
wiley   +1 more source

Unraveling the pathogenesis and prevention strategies of acute high-altitude illness through gut microecology

npj Biofilms and Microbiomes
High-altitude environments, characterized by hypobaric and hypoxic conditions, induce acute hypoxia, resulting in decreased blood oxygen saturation.
Ping Qi, Xiansen Jiang, Xiaojuan Wang, Liang Sheng, Jiawen Liang, Lei Zhang   +5 more
doaj   +1 more source

Ascent rate and the Lake Louise scoring system: An analysis of one year of emergency ward entries for high-altitude sickness at the Mustang district hospital, Nepal. [PDF]

PLoS One, 2022
Poudel KM, Poudel TR, Shah N, Bhandari S, Sharma R, Timilsina A, Prakash M.   +6 more
europepmc   +1 more source

The effect of exercise on venous gas emboli and decompression sickness in human subjects at 4.3 psia [PDF]

The contribution of upper body exercise to altitude decompression sickness while at 4.3 psia after 3.5 or 4.0 hours of 100% oxygen prebreathing at 14.7 psia was determined by comparing the incidence and patterns of venous gas emboli (VGE), and the ...
Conkin, Johnny, Hadley, Arthur T., III, Horrigan, David J., Jr., Waligora, James M.   +3 more
core   +1 more source

Brain strain: Blood flow and metabolism in environmental extremes

Experimental Physiology, EarlyView.
Abstract This narrative review compares and contrasts the most commonly encountered environmental stressors on human cerebrovascular functioning. From high altitude and space, extreme apnoea, heat and cold stress, the impact of these stressors on the regulation of cerebral blood flow (CBF) and oxygen metabolism (CMRO2${\mathrm{CM}}{{\mathrm{R}}_ ...
Dario Vrdoljak, Damian M. Bailey, Travis D. Gibbons, Philip N. Ainslie   +3 more
wiley   +1 more source

Erythropoietin modulates the neural control of hypoxic ventilation [PDF]

, 2018
Numerous factors involved in general homeostasis are able to modulate ventilation. Classically, this comprises several kind of molecules, including neurotransmitters and steroids that are necessary for fine tuning ventilation under different conditions ...
Gassmann, Max, Soliz, Jorge
core  

Pulmonary arterial mechanoreceptors mediate sustained sympathoexcitation during high altitude hypoxia in humans

Experimental Physiology, EarlyView.
Abstract Sympathetic nervous system activation is a hallmark of high‐altitude hypoxia, yet the afferent mechanisms remain incompletely defined. We examined the relative contributions of pulmonary arterial mechanoreceptors and carotid chemoreceptors – two excitatory pathways co‐activated by hypoxia – to sustained sympathoexcitation at altitude.
Michiel T. Ewalts, Lydia L. Simpson, Jack S. Talbot, Elliott J. Jenkins, Travis D. Gibbons, Connor A. Howe, Lauren E. Maier, Emily R. Vanden Berg, Alex M. Williams, Philip N. Ainslie, Samuel J. Oliver, Craig D. Steinback, Mike Stembridge, Jonathan P. Moore   +13 more
wiley   +1 more source

Cardiorespiratory effects of high altitude exposure

Cardiologia Hungarica
At high altitude, the partial pressure of oxygen in the air is lower than at sea level. During acclimatization, the body adapts to this condition through respiratory, circulatory, renal, and hematological processes.
Szilvia Kugler, Eszter Dalma Pálinkás, Béla Merkely, Balázs Sax   +3 more
doaj   +1 more source

Extravehicular activities limitations study. Volume 1: Physiological limitations to extravehicular activity in space [PDF]

This report contains the results of a comprehensive literature search on physiological aspects of EVA. Specifically, the topics covered are: (1) Oxygen levels; (2) Optimum EVA work; (3) Food and Water; (4) Carbon dioxide levels; (5) Repetitive ...
Furr, Paul A., Monson, Conrad B., Peterson, Donald H., Santoro, Robert L., Sears, William J., Smith, Malcolm   +5 more
core   +1 more source

Pulmonary arterial mechanoreceptors modulate exercise‐induced sympathetic activation in healthy humans during moderate‐intensity hypoxic exercise

The Journal of Physiology, EarlyView.
Abstract figure legend This randomized cross‐over trial (N = 12) addressed the hypothesis that selective reduction of pulmonary arterial pressure (i.e. manipulation of pulmonary arterial mechanoreceptor activation) during hypoxic exercise would reduce sympathetic outflow (muscle sympathetic nerve activity (MSNA)) in healthy humans.
Michiel T. Ewalts, Thomas D. Griffiths, Andrew J. M. Douglas, Elliott J. Jenkins, Guto Wyn Hughes, Craig D. Steinback, Lydia L. Simpson, Samuel J. Oliver, Mike Stembridge, Jonathan P. Moore   +9 more
wiley   +1 more source