Results 51 to 60 of about 326,369 (139)
Haematologica, 2019 Sickle cell disease is characterized by chronic hemolytic anemia and vascular inflammation, which can diminish the vasodilatory capacity of the small resistance arteries, making them less adept at regulating cerebral blood flow.
Lena Václavů +8 more
doaj +1 more source
Evaluation of the Extension of the Cerebral Blood Flow and its Main Parameters [PDF]
arXiv, 1999 Among the major factors controlling the cerebral blood flow (CBF) - cerebral perfusion pressure, arterial partial pressure of oxygen (PaO2), cerebral metabolism, arterial partial pressure of carbon dioxide (PaCO2), and cardiac output, the effect of PaCO2 is peculiar in being independent of autoregulatory CBF mechanisms and it allows to explore the full
arxiv
eLife, 2016 Cerebral small vessel disease (SVD) is a leading cause of stroke and dementia. CADASIL, an inherited SVD, alters cerebral artery function, compromising blood flow to the working brain.
Carmen Capone +10 more
doaj +1 more source
Interferometric speckle visibility spectroscopy (ISVS) for human cerebral blood flow monitoring [PDF]
arXiv, 2020 Infrared light scattering methods have been developed and employed to non-invasively monitor human cerebral blood flow (CBF). However, the number of reflected photons that interact with the brain is low when detecting blood flow in deep tissue. To tackle this photon-starved problem, we present and demonstrate the idea of interferometric speckle ...
arxiv
PLoS ONECerebral blood flow at rest declines with age. However, age-related changes in functional measures of cerebrovascular health including cerebrovascular reactivity and neurovascular coupling are not well understood.
Andrew G Pearson +9 more
doaj +1 more source
NeuroImage, 2022 Quantification of the effect of breathing on the cerebral circulation provides a better mechanistic understanding of the brain's circulatory system and is important in the early diagnosis of certain neurological diseases. However, conventional cine phase-
Pan Liu, Sidy Fall, Olivier Balédent
doaj
Frontiers in Neuroscience, 2018 Transcranial direct-current stimulation (DCS) offers a method for noninvasive neuromodulation usable in basic and clinical human neuroscience. Laser-speckle contrast imaging (LSCI), a powerful, low-cost method for obtaining images of dynamic systems, can
Shuo Hu +4 more
doaj +1 more source
Signal analysis of impulse response functions in MR- and CT-measurements of cerebral blood flow [PDF]
J. Theor. Biol. 240 (2006) 451-458, 2005 The impulse response function (IRF) of a localized bolus in cerebral blood flow codes important information on the tissue type. It is indirectly accessible both from MR- and CT-imaging methods, at least in principle. In practice, however, noise and limited signal resolution render standard deconvolution techniques almost useless.
arxiv
Vestibular effects on cerebral blood flow
BMC Neuroscience, 2009 Background Humans demonstrate a number of unique adaptations that allow for the maintenance of blood pressure and brain blood flow when upright. While several physiological systems, including cerebral autoregulation, are involved in this adaptation the ...
Schlegel Todd T +3 more
doaj +1 more source
Assessing Sensitivity of Brain-to-Scalp Blood Flows in Laser Speckle Imaging by Occluding the Superficial Temporal Artery [PDF]
arXivCerebral blood flow is a critical metric for cerebrovascular monitoring, with applications in stroke detection, brain injury evaluation, aging, and neurological disorders. Non-invasively measuring cerebral blood dynamics is challenging due to the scalp and skull, which obstruct direct brain access and contain their own blood dynamics that must be ...
arxiv