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Retinal Neurovascular Coupling in Diabetes [PDF]
Journal of Clinical Medicine, 2020 Neurovascular coupling, also termed functional hyperemia, is one of the physiological key mechanisms to adjust blood flow in a neural tissue in response to functional activity. In the retina, increased neural activity, such as that induced by visual stimulation, leads to the dilatation of retinal arterioles, which is accompanied by an immediate ...
Gerhard Garhofer +2 more
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Spreading Depression and Neurovascular Coupling [PDF]
Stroke, 2013 Spreading depression, discovered by Leao in 1944,1 is an intense depolarization wave that slowly propagates (≈3 mm/min) in gray matter by way of contiguity, regardless of functional divisions or arterial territories. The depolarization is associated with massive transmembrane ionic and water shifts coupled to a surge in extracellular K+ and ...
Cenk Ayata
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Heritability of brain neurovascular coupling
Journal of Neurophysiology, 2022Here we show that the sample-to-sample turnover of the resting state fMRI blood-oxygen-level-dependent turnover (TBOLD) is heritable, the left and right hemisphere TBOLD heritabilities are highly correlated, and TBOLD heritability varies among cortical areas.
Peka Christova +2 more
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Neurovascular coupling: motive unknown
Trends in Neurosciences, 2022In the brain, increases in neural activity drive changes in local blood flow via neurovascular coupling. The common explanation for increased blood flow (known as functional hyperemia) is that it supplies the metabolic needs of active neurons. However, there is a large body of evidence that is inconsistent with this idea.
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Is Neurovascular Coupling of Relevance in Glaucoma?
Survey of Ophthalmology, 2007Rapid development of functional neuroimaging techniques have brought about a growing interest for neurovascular coupling in neuroresearch, which, in turn, has prompted similar research in ophthalmology. There are now hints that neurovascular coupling is disturbed in glaucoma.
Konstantin, Gugleta +2 more
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Brain capillary pericytes and neurovascular coupling
Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology, 2021The neurovascular coupling ensures that cerebral activity is matched by the relevant blood flow. The control of the blood flow is mediated by capillaries and by the precapillary aterioles. It is the tone of the mural cells, which include pericytes, smooth muscle cells and cells with intermediate phenotypes between pericytes and smooth muscle cells ...
Grubb, Søren +2 more
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Ethanol modulates the neurovascular coupling
NeuroToxicology, 2013Despite some evidence of the underlying molecular mechanisms the neuronal basis of ethanol-induced effects on the neurovascular coupling that forms the BOLD (blood oxygenation level dependent) signal is poorly understood. In a recent fMRI (functional magnetic resonance imaging) study monitoring ethanol-induced changes of the BOLD signal a reduction of ...
Michael, Luchtmann +7 more
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Modeling of the Neurovascular Coupling in Epileptic Discharges
Brain Topography, 2011Despite the interest in simultaneous EEG-fMRI studies of epileptic spikes, the link between epileptic discharges and their corresponding hemodynamic responses is poorly understood. In this context, biophysical models are promising tools for investigating the mechanisms underlying observed signals.
Voges, Nicole +7 more
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The contribution of astrocyte signalling to neurovascular coupling
Brain Research Reviews, 2010The tight spatial and temporal coupling between neuronal activity and blood flow ensures that active brain regions receive an adequate supply of oxygen and energetic metabolites. There clearly is still an enormous amount of experimental and theoretical work to be done to unravel the precise mechanism of neurovascular coupling, but over the last decade ...
Carmignoto, Giorgio, GomezGonzalo, Marta
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Fractional dynamical model for neurovascular coupling
2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2014The neurovascular coupling is a key mechanism linking the neural activity to the hemodynamic behavior. Modeling of this coupling is very important to understand the brain function but it is at the same time very complex due to the complexity of the involved phenomena.
Zehor Belkhatir +1 more
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