Results 101 to 110 of about 775,260 (336)
Journal of Magnetic Resonance Imaging, EarlyView.ABSTRACT Background Dynamic changes in the apparent diffusion coefficient (ΔADC) during the cardiac cycle reflect water molecule fluctuations in the brain and intracranial conditions. While body position strongly affects intracranial conditions, the relationship between ΔADC and body position has been less explored, as conventional MRI is typically ...
Naoki Ohno +5 more
wiley +1 more source
International Journal of Stroke, 2019 Background Cerebral autoregulation is impaired in a multitude of neurological conditions. Increasingly, clinical studies are correlating the nature of this impairment with prognostic markers.
J. Minhas +3 more
semanticscholar +1 more source
NeuroImage: Clinical, 2016 Cerebral autoregulation represents the physiological mechanisms that keep brain perfusion relatively constant in the face of changes in blood pressure and thus plays an essential role in normal brain function.
Fenghua Tian +4 more
doaj +1 more source
Sources of stochasticity in constitutive and autoregulated gene expression [PDF]
Phys. Scr. T 151, 014068 (2012), 2012 Gene expression is inherently noisy as many steps in the read-out of the genetic information are stochastic. To disentangle the effect of different sources of stochasticity in such systems, we consider various models that describe some processes as stochastic and others as deterministic.
arxiv +1 more source
Physiologically based modelling of cerebral autoregulation [PDF]
The human brain requires sufficient and continuous blood supply to maintain healthy function. Cerebral autoregulation (CA), a highly complex mechanism, plays a crucial role in achieving this function.
Wang, Yufan
core +2 more sources
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 +5 more
openaire +3 more sources
Journal of Cerebral Blood Flow and Metabolism, 2018 We aimed to assess cerebral autoregulation (CA) and neurovascular coupling (NVC) in stroke patients of differing severity comparing responses to healthy controls and explore the association between CA and NVC with functional outcome.
Angela S. M. Salinet +10 more
semanticscholar +1 more source
Critical Care Research and Practice, 2018 Extracorporeal membrane oxygenation (ECMO) is a life-saving technique that is widely being used in centers throughout the world. However, there is a paucity of literature surrounding the mechanisms affecting cerebral physiology while on ECMO.
Syed Omar Kazmi +4 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 +5 more
doaj +1 more source
Adaptive feedback analysis and control of programmable stimuli for assessment of cerebrovascular function [PDF]
, 2013 The assessment of cerebrovascular regulatory mechanisms often requires flexibly controlled and precisely timed changes in arterial blood pressure (ABP) and/or inspired CO2.
Allen, Robert +7 more
core +1 more source