Results 101 to 110 of about 68,906 (342)

Gills as Possible Accessory Circulatory Pumps in Limulus polyphemus [PDF]

, 1989
Heart electrical activity (ECGs), gill closer muscle potentials (EMGs), and blood pressures in the heart and the branchiocardiac canals, were measured in adult horseshoe crabs (Limulus polyphemus) during various activities.
Freadman, M. A., Watson, Winsor H., III
core   +1 more source

Optimizing cerebrovascular endothelial health through shear stress modulation

Experimental 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, Rintaro Sakamoto, Darren P. Casey   +2 more
wiley   +1 more source

Design and Validation of a Breathing Detection System for Scuba Divers

Sensors, 2017
Drowning is the major cause of death in self-contained underwater breathing apparatus (SCUBA) diving. This study proposes an embedded system with a live and light-weight algorithm which detects the breathing of divers through the analysis of the ...
Corentin Altepe, S. Murat Egi, Tamer Ozyigit, D. Ruzgar Sinoplu, Alessandro Marroni, Paola Pierleoni   +5 more
doaj   +1 more source

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

Experimental 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

Inspiratory muscle training reduces blood lactate concentration during volitional hyperpnoea [PDF]

, 2008
Although reduced blood lactate concentrations ([lac−]B) have been observed during whole-body exercise following inspiratory muscle training (IMT), it remains unknown whether the inspiratory muscles are the source of at least part of this reduction.
A Ramírez-Sarmiento, AD Gething, AE Downey, AK McConnell, AK McConnell, AK McConnell, AM Edwards, BJ Martin, C Juel, CM Spengler, CM Spengler, DG Sale, DL Costill, EJ Marcinik, GA Brooks, Graham R. Sharpe, H Dubouchaud, HV Forster, J Kohl, JD Witt, JJ Leddy, JO Holloszy, JR Coast, KA Burgomaster, LA Griffiths, LM Romer, LM Romer, MA Johnson, MA Johnson, Michael A. Johnson, O Siggaard-Anderson, P McLoughlin, Peter I. Brown, PH Quanjer, PJ LeBlanc, S Verges, S Volianitis, SF Davies, SH Wilson, SJ Enright, SK Baker, SK Powers, TJ Wetter   +42 more
core   +2 more sources

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

Experimental 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, Shigehiko Ogoh, Manabu Shibasaki   +2 more
wiley   +1 more source

Time‐course analysis of cerebral circulation and cardiorespiratory responses to acute central blood volume reduction in healthy young males

Experimental Physiology, EarlyView.
Abstract Central blood volume (CBV) reduction challenges circulatory and respiratory homeostasis, particularly during the initial compensatory phase (0–2 min), when rapid physiological adaptations occur. In this study, we examined dynamic cardiorespiratory responses to CBV reduction using lower‐body negative pressure (LBNP) in 11 healthy young males ...
Marina Feeley, Tomoki Watada, Go Ito, Ai Shimada, Toru Sawai, Hideomi Nakata, Shingo Otsuki, Tadayoshi Miyamoto   +7 more
wiley   +1 more source

Hyperventilation and neurasthenia. [PDF]

, 1989
J B Wilkinson, J C King, P.G.F. Nixon
openalex   +1 more source

Cerebral oxygen extraction across different exercise intensities: Role of arterial PCO2${P_{{\mathrm{C}}{{\mathrm{O}}_2}}}$

Experimental Physiology, EarlyView.
Abstract Stability in cerebral oxygen extraction fraction (OEF) is typically determined by alterations in cerebral blood flow (CBF). At rest, arterial partial pressure of carbon dioxide (PaCO2${P_{{\mathrm{aC}}{{\mathrm{O}}_2}}}$) and OEF exhibit a strong inverse relationship owing to the powerful influence of PaCO2${P_{{\mathrm{aC}}{{\mathrm{O}}_2}}}$
L. Madden Brewster, Travis Dylan Gibbons, Hannah Grace Caldwell, Connor A. Howe, Jennifer S. Duffy, Andrew R. Steele, Justin A. Monteleone, Jay M. J. R. Carr, Jodie Lauren Koep, Tenasia D. R. Monaghan, David B. MacLeod, Philip N. Ainslie   +11 more
wiley   +1 more source

Unraveling persistent dyspnea after mild COVID: insights from a case series on hyperventilation provocation tests

Frontiers in Physiology
Dyspnea is a common yet poorly understood symptom of long COVID, affecting many patients. This brief report examines the role of dysfunctional breathing in persistent dyspnea among patients with mild post-COVID-19 using hyperventilation provocation tests
Ophélie Ritter, Sofia Noureddine, Lucie Laurent, Pauline Roux, Virginie Westeel, Virginie Westeel, Cindy Barnig, Cindy Barnig   +7 more
doaj   +1 more source