Results 81 to 90 of about 1,332 (157)

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

open access: yesExperimental 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   +8 more
wiley   +1 more source

Sport-Related Concussion Alters Indices of Dynamic Cerebral Autoregulation

open access: yesFrontiers in Neurology, 2018
Sport-related concussion is known to affect a variety of brain functions. However, the impact of this brain injury on cerebral autoregulation (CA) is poorly understood. Thus, the goal of the current study was to determine the acute and cumulative effects
Alexander D. Wright   +8 more
doaj   +1 more source

Vascular health and exercise in females throughout the lifespan: Exploring puberty, pregnancy and menopause

open access: yesExperimental Physiology, EarlyView.
Abstract This narrative review highlights the impact of exercise on vascular health in females over the lifespan with an emphasis on puberty, pregnancy and menopause. These events encompass substantial changes in sex hormone levels, particularly oestrogens and progesterone.
Kathleen B. Miller   +2 more
wiley   +1 more source

Effects of noradrenaline and phenylephrine on cerebral oxygen saturation during cardiopulmonary bypass in cardiac surgery

open access: yesExperimental Physiology, EarlyView.
Abstract Cardiopulmonary bypass (CPB) in cardiac surgery is associated with a high risk of postoperative neurological complications. Perioperative use of vasopressors is common to counteract arterial hypotension in this setting. However, use of α‐agonist vasopressors has been associated with cerebral desaturations.
Edouard Marques   +7 more
wiley   +1 more source

Minimum area of forests left to spontaneous development in protected areas

open access: yesJournal of Forest Science, 2003
Search for ecological criteria for decisions on forests to be left to spontaneous development in specially protected areas is based on the knowledge of regularities of autochthonous or natural forests.
S. Vacek
doaj   +1 more source

CARM1 regulates tubulin autoregulation through PI3KC2α R175 methylation

open access: yesCell Communication and Signaling
Tubulin is crucial in several cellular processes, including intracellular organization, organelle transport, motility, and chromosome segregation. Intracellular tubulin concentration is tightly regulated by an autoregulation mechanism, in which excess ...
Yena Cho   +5 more
doaj   +1 more source

Monitoring of Cerebral Blood Flow Autoregulation after Cardiac Arrest

open access: yesMedicina
Background: Cardiac arrest remains one of the leading causes of death. After successful resuscitation of patients in cardiac arrest, post-cardiac arrest syndrome develops, part of it being an impaired cerebral blood flow autoregulation.
Rok Petrovčič   +2 more
doaj   +1 more source

Regional cerebral perfusion and sympathetic activation during exercise in hypoxia and hypercapnia: preliminary insight into ‘Cushing's mechanism’

open access: yesThe Journal of Physiology, EarlyView.
Abstract figure legend During handgrip exercise in hypoxia, brain perfusion is suboptimal and muscle sympathetic nerve activity is potentiated (left panel). During the exercise in hypercapnia, brain perfusion is supraoptimal and muscle sympathetic nerve activity is suppressed (right panel). These observations support the notion that Cushing's mechanism
Hsuan‐Yu Wan   +6 more
wiley   +1 more source

Hypertensive disorders of pregnancy and neuroimaging markers of dementia risk: A pilot study

open access: yesPregnancy, Volume 1, Issue 3, May 2025.
Abstract Background and Objectives Hypertensive disorders of pregnancy (HDP) are associated with a long‐term risk of maternal cognitive decline. Limited data exist regarding maternal brain structure in midlife after HDP. We examined the association between prior HDP and neuroimaging markers associated with microvascular brain injury, detected on high ...
Mohamad J. Alshikho   +22 more
wiley   +1 more source

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