...Michèle Bisson; Isabelle Marc; Patrice Brassard Cerebral blood flow (CBF) regulation is an indicator of cerebrovascular health increasingly recognized as being influenced by physical activity. Although regular exercise is recommended during healthy pregnancy, the effects of exercise on CBF...

... implications. However, how brain metabolism depends on oxygen availability has not been clearly examined in humans. We therefore assessed the influence of oxygen on CBF (cerebral blood flow) and CMRO 2 (cerebral metabolic rates for oxygen) and carbohydrates. P a O 2 (arterial partial pressure of oxygen...

... impairment, often described as ‘mental fog’. We hypothesized that orthostatic stress causes neurocognitive impairment in CFS/POTS related to decreased CBFV (cerebral blood flow velocity). A total of 16 CFS/POTS and 20 control subjects underwent graded tilt table testing (at 0, 15, 30, 45, 60 and 75...

... cerebral blood flow velocity by transcranial Doppler ultrasonography in the middle cerebral artery, arterial blood pressure, end-tidal CO 2 , as well as HIF-1 protein and serum lactate dehydrogenase concentrations in response to 8 h of desferroxamine compared with placebo infusion. Cerebrovascular...

...Penelope J. EAMES; John F. POTTER; Ronney B. PANERAI Transfer function analysis of spontaneous fluctuations in BP (blood pressure) and CBFV (cerebral blood flow velocity) has been widely used to study dynamic CA (cerebral autoregulation). The inverse Fourier transform and its integral, giving...

... for tissue oxygenation is demonstrated. acute mountain sickness blood gases carbon dioxide cerebral blood flow high altitude middle cerebral artery velocity near-IR spectroscopy oxygen Correspondence: Mr Chris Imray (e-mail [email protected] ). 17 4 2002 10 9 2002 26 11...

...J. N. S. MATTHEWS; D. S. F. MATTHEWS; J. A. EYRE The Kety–Schmidt technique for the measurement of cerebral blood flow (CBF) has been in use for many years, but efficient statistical methods for producing estimates of CBF have received little attention. This paper proposes simple statistical models...

... 7 1992 © 1992 The Biochemical Society and the Medical Research Society 1992 altitude cerebral blood flow cognitive performance hypoxia visual perception visual threshold Clinical Science (1992) 83, 633-636 (Printed in Great Britain) 633 Paradoxical effects of mild hypoxia...

...P. A. Flecknell; R. Wootton; Muriel John 1. Cerebral blood flow and cerebral metabolism were measured in conscious, normally grown neonatal piglets and in littermates which had undergone intrauterine growth retardation. 2. Cerebral blood flow was measured by the Kety-Schmidt technique using [ 125 I...

... changes within the above range did not alter P o 2 of internal jugular venous blood, suggesting that cerebral blood flow was unaltered. 4. Positive pressure changes induced reflex pressor responses of similar magnitude at arterial P o 2 12·8 and 70·1 kPa (96 and 527 mmHg), suggesting that the carotid...

... baroreceptor reflex. 2. There is no evidence for a reduction in cerebral blood flow nor of carotid chemoreceptor stimulation in response to an increase in neck chamber pressure of about 45 mmHg. Thus it is likely that the pressor response to this manoeuvre is in fact due to reduction in carotid baroreceptor...

... the experimental production of liver failure. Arterial P co 2 and pH, cerebral blood flow and the cerebral metabolic rate for oxygen were also measured in four of the goats while they breathed air and various CO 2 -enriched gas mixtures. 2. Liver failure was accompanied by a respiratory alkalosis in both...

... is discussed, together with their relevance to the causation of encephalopathy in patients after portacaval shunts. 9 12 1971 © 1972 The Biochemical Society and the Medical Research Society 1972 portacaval shunting cerebral blood flow peripheral blood flow cerebral metabolism peripheral...