Cellular control of brain capillary blood flow: in vivo imaging veritas

J Grutzendler, M Nedergaard - Trends in neurosciences, 2019 - cell.com
The precise modulation of regional cerebral blood flow during neural activation is important
for matching local energetic demand and supply and clearing brain metabolites. Here we …

[HTML][HTML] Insights into cerebral haemodynamics and oxygenation utilising in vivo mural cell imaging and mathematical modelling

PW Sweeney, S Walker-Samuel, RJ Shipley - Scientific Reports, 2018 - nature.com
The neurovascular mechanisms underpinning the local regulation of cerebral blood flow
(CBF) and oxygen transport remain elusive. In this study we have combined novel in vivo …

Functional reactivity of cerebral capillaries

B Stefanovic, E Hutchinson… - Journal of Cerebral …, 2008 - journals.sagepub.com
The spatiotemporal evolution of cerebral microcirculatory adjustments to functional brain
stimulation is the fundamental determinant of the functional specificity of hemodynamically …

Blood flow in the cerebral capillary network: a review emphasizing observations with intravital microscopy

AG Hudetz - Microcirculation, 1997 - Taylor & Francis
Capillary perfusion in the brain is characterized by an essentially continuous flow of
erythrocytes and plasma in almost all capillaries. Rapid fluctuations and spatial …

The capillary bed offers the largest hemodynamic resistance to the cortical blood supply

IG Gould, P Tsai, D Kleinfeld… - Journal of Cerebral …, 2017 - journals.sagepub.com
The cortical angioarchitecture is a key factor in controlling cerebral blood flow and oxygen
metabolism. Difficulties in imaging the complex microanatomy of the cortex have so far …

Fluctuations and stimulus-induced changes in blood flow observed in individual capillaries in layers 2 through 4 of rat neocortex

D Kleinfeld, PP Mitra, F Helmchen… - Proceedings of the …, 1998 - National Acad Sciences
Cortical blood flow at the level of individual capillaries and the coupling of neuronal activity
to flow in capillaries are fundamental aspects of homeostasis in the normal and the diseased …

Precapillary sphincters and pericytes at first-order capillaries as key regulators for brain capillary perfusion

SA Zambach, C Cai, HCC Helms… - Proceedings of the …, 2021 - National Acad Sciences
Rises in local neural activity trigger local increases of cerebral blood flow, which is essential
to match local energy demands. However, the specific location of microvascular flow control …

[HTML][HTML] Capillary flow homogenization during functional activation revealed by optical coherence tomography angiography based capillary velocimetry

Y Li, W Wei, RK Wang - Scientific reports, 2018 - nature.com
Elaborate modeling study suggests an important role of capillary transit time heterogeneity
(CTTH) reduction in brain oxygenation during functional hyperemia. Here, we use optical …

Role of endothelium-pericyte signaling in capillary blood flow response to neuronal activity

W Zhang, CM Davis, DM Zeppenfeld… - Journal of Cerebral …, 2021 - journals.sagepub.com
Local blood flow in the brain is tightly coupled to metabolic demands, a phenomenon termed
functional hyperemia. Both capillaries and arterioles contribute to the hyperemic response to …

Active dilation of penetrating arterioles restores red blood cell flux to penumbral neocortex after focal stroke

AY Shih, B Friedman, PK Drew… - Journal of Cerebral …, 2009 - journals.sagepub.com
Pial arterioles actively change diameter to regulate blood flow to the cortex. However, it is
unclear whether arteriole reactivity and its homeostatic role of conserving red blood cell …