Results 81 to 90 of about 35,706 (284)

The effect of hypercapnia on static cerebral autoregulation [PDF]

Physiological Reports, 2014
Hypercapnia impairs cerebrovascular control during rapid changes in blood pressure (BP); however, data concerning the effect of hypercapnia on steady state, nonpharmacological increases in BP is scarce. We recruited fifteen healthy volunteers (mean ± SD: age, 28 ± 6 years; body mass, 77 ± 12 kg) to assess the effect of hypercapnia on cerebrovascular ...
Darryl J. Cochrane, Blake G. Perry, Samuel J. E. Lucas, Samuel J. E. Lucas, Toby Mündel, Kate N. Thomas   +5 more
openaire   +3 more sources

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

Spinal cord autoregulation using near-infrared spectroscopy under normal, hypovolemic, and post-fluid resuscitation conditions in a swine model: a comparison with cerebral autoregulation

Journal of Intensive Care, 2020
Background Few studies have investigated spinal cord autoregulation using near-infrared spectroscopy (NIRS). Here, we assessed spinal cord autoregulation under normal, hypovolemic, and post-fluid resuscitation conditions compared with cerebral ...
Tadayoshi Kurita, Shingo Kawashima, Koji Morita, Yoshiki Nakajima   +3 more
doaj   +1 more source

Cerebral autoregulation is minimally influenced by the superior cervical ganglion in two- week-old lambs, and absent in preterm lambs immediately following delivery. [PDF]

PLoS ONE, 2013
Cerebral vessels in the premature newborn brain are well supplied with adrenergic nerves, stemming from the superior cervical ganglia (SCG), but their role in regulation of blood flow remains uncertain.
Adam J Czynski, Michael H Terry, Douglas D Deming, Gordon G Power, John N Buchholz, Arlin B Blood   +5 more
doaj   +1 more source

Exercise, cognition and Alzheimer’s disease: More is not necessarily better [PDF]

, 2005
Regional hypoperfusion, associated with a reduction in cerebral metabolism, is a hallmark of Alzheimer’s disease (AD) and contributes to cognitive decline. Cerebral perfusion and hence cognition can be enhanced by exercise.
Adlard, Alessi, Anton, Attwell, Baumbach, Bierman, Carmeliet, Chen, Chen, Churchill, Cohen, Colcombe, Cooke, Corder, Cott, Critchley, Cumming, Daley, De la Torre, Dick Swaab, Diesfeldt, Dubelaar, Eldridge, Endres, Erik Scherder, Farkas, Fedele, Fernández-Vizarra, Folstein, Fratiglioni, Friedman, Graham, Guigoz, Hamel, Harkany, Hayward, Hellström, Herrmann, Herrmann, Hoffman, Huang, Hönigfeld, Iadecola, Ide, Ide, Ide, Jagust, Johnson, Jørgensen, Katz, Keller, Kivipelto, Koike, Koistinaho, Kubes, Kurosawa, Launer, Laura Eggermont, Lawton, Lazowski, Lehtovirta, Liesi, Lijnen, Lindenmuth, MacRae, Martel, Matsuda, Matsuda, Maxwell, Melchor, Meltzer, Meyer, Miklossy, Monji, Morgan, Moro, Mulder, Muldowney, Nagahama, Nagai, Nakajima, Namazi, Naso, Palleschi, Palmer, Parihar, Paul Luiten, Petersen, Plutchik, Pober, Pott, Powell, Prager, Prunell, Raven, Reiman, Reitan, Rolland, Roth, Salehi, Scherder, Schini-Kerth, Selley, Skoog, Smith, Sobel, Spinler, Srikiatkhachorn, Suzuki, Swaab, Swaab, Swaab, Swain, Tappen, Tappen, Teri, Tinetti, Tong, Tong, Tsolaki, Tucker, Tucker, Ueda, Ushijima, Van de Winckel, Van Dyck, Van Gelder, Wang, Warkentin, Wechsler, Wechsler, Weller, Wenk, Whelton, White, Wilson, Wolf, Zarit   +137 more
core   +1 more source

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

Experimental 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, M. Erin Moir, Brandon G. Fico   +2 more
wiley   +1 more source

Acute management of poor condition subarachnoid hemorrhage patients [PDF]

, 2012
Poor condition subarachnoid hemorrhage (SAH) patients present a high mortality and morbidity. In this study, we reviewed the acute interventional (surgical and endovascular) management of 109 SAH-poor condition patients, who were treated as early as ...
Archavlis, Eleftherios, Carvi y Nievas, Mario N.   +1 more
core  

Prognostic significance of short-term blood pressure variability in acute stroke [PDF]

, 2015
Background and Purpose— Blood pressure variability (BPV) may be an important prognostic factor acutely after stroke. This review investigated the existing evidence for the effect of BPV on outcome after stroke, also considering ...
Manning, Lisa S., Potter, John F., Robinson, Thompson G., Rothwell, Peter M.   +3 more
core   +1 more source

Effects of Hypobaric Hypoxia on Cerebral Autoregulation [PDF]

Stroke, 2010
Background and Purpose— Acute hypoxia is associated with impairment of cerebral autoregulation (CA), but it is unclear if altered CA during prolonged hypoxia is pivotal to the development of cerebral pathology, such as that seen in acute mountain sickness (AMS).
Subudhi, AW, Panerai, RB, Roach, RC
openaire   +4 more sources

Cerebrovascular pulsatility following long duration spaceflight is associated with changes in pulse pressure and carotid artery stiffness

Experimental Physiology, EarlyView.
Abstract Central artery stiffening increases the haemodynamic pulsations transmitted downstream towards target organs, including the brain. While recent evidence suggests that long duration spaceflight is associated with reduced common carotid artery (CCA) distensibility, cerebrovascular pulsatility has not been extensively characterized in astronauts.
Roxanne Fournier, Danielle K. Greaves, J. Kevin Shoemaker, Philippe Arbeille, Richard L. Hughson, Andrew D. Robertson   +5 more
wiley   +1 more source