Results 11 to 20 of about 14,810,160 (259)

CORTICAL PHASE TRANSITIONS, NONEQUILIBRIUM THERMODYNAMICS AND THE TIME-DEPENDENT GINZBURG–LANDAU EQUATION [PDF]

International Journal of Modern Physics B, 2012
The formation of amplitude modulated and phase modulated assemblies of neurons is observed in the brain functional activity. The study of the formation of such structures requires that the analysis has to be organized in hierarchical levels, microscopic, mesoscopic, macroscopic, each with its characteristic space-time scales and the various forms of ...
WALTER J. FREEMAN, LIVI, ROBERTO, MASASHI OBINATA, GIUSEPPE VITIELLO   +3 more
openaire   +5 more sources

The effects of hypercapnia on cortical capillary transit time heterogeneity (CTH) in anesthetized mice [PDF]

Journal of Cerebral Blood Flow & Metabolism, 2017
Capillary flow patterns are highly heterogeneous in the resting brain. During hyperemia, capillary transit-time heterogeneity (CTH) decreases, in proportion to blood's mean transit time (MTT) in passive, compliant microvascular networks. Previously, we found that functional activation reduces the CTH:MTT ratio, suggesting that additional homogenization
Gutiérrez-Jiménez, Eugenio; id_orcid 0000-0002-7509-0720, Angleys, Hugo, Rasmussen, Peter Mondrup; id_orcid 0000-0001-6849-0788, Mikkelsen, Irene Klærke, Mouridsen, Kim, Østergaard, Leif; id_orcid 0000-0003-2930-6997   +5 more
openaire   +3 more sources

transit-timing/transit-timing: Transit Timing En Masse

, 2022
This repository contains source code for the "TESS Transit Timing of 277 Planets" paper. The repository provides code (1) to process TESS light curves (with 2, 10, or 30-minute sampling) to extract transit times, and (2) to automatically download arXiv ...
transit-timing
core   +1 more source

Depth-dependent flow and pressure characteristics in cortical microvascular networks. [PDF]

PLoS Computational Biology, 2017
A better knowledge of the flow and pressure distribution in realistic microvascular networks is needed for improving our understanding of neurovascular coupling mechanisms and the related measurement techniques.
Franca Schmid, Philbert S Tsai, David Kleinfeld, Patrick Jenny, Bruno Weber   +4 more
doaj   +1 more source

Hemodynamic changes in superficial arteriovenous malformation surgery measured by intraoperative ICG fluorescence videoangiography with FLOW 800 software

Chinese Neurosurgical Journal, 2020
Background Arteriovenous malformation(AVM) have long-term “blood stealing” characteristics, which result in complicated hemodynamic features. To analyze the application of intraoperative indocyanine green angiography with FLOW 800 software in AVM ...
Xun Ye, Liang Wang, Ming-tao Li, Xiao-lin Chen, Hao Wang, Li Ma, Rong Wang, Yan Zhang, Yong Cao, Yuan-li Zhao, Dong Zhang, Shuo Wang   +11 more
doaj   +1 more source

Intra- and Inter-Observer Variability of Quantitative Parameters Used in Contrast-Enhanced Ultrasound of Kidneys of Healthy Cats

Animals, 2022
Contrast-enhanced ultrasound (CEUS) is a non-invasive imaging technique which allows qualitative and quantitative assessment of tissue perfusion. Although CEUS offers numerous advantages, a major challenge remains the variability in tissue perfusion ...
Amber Hillaert, Emmelie Stock, Sophie Favril, Luc Duchateau, Jimmy H. Saunders, Katrien Vanderperren   +5 more
doaj   +1 more source

Impaired perfusion and capillary dysfunction in prodromal Alzheimer's disease

Alzheimer’s & Dementia: Diagnosis, Assessment & Disease Monitoring, 2020
Introduction Cardiovascular disease increases the risk of developing Alzheimer's disease (AD), and growing evidence suggests an involvement of cerebrovascular pathology in AD. Capillary dysfunction, a condition in which capillary flow disturbances rather
Rune B. Nielsen, Peter Parbo, Rola Ismail, Rikke Dalby, Anna Tietze, Hans Brændgaard, Hanne Gottrup, David J. Brooks, Leif Østergaard, Simon F. Eskildsen   +9 more
doaj   +1 more source

Virtual reality-based real-time imaging reveals abnormal cortical dynamics during behavioral transitions in a mouse model of autism

Cell Reports, 2023
Functional connectivity (FC) can provide insight into cortical circuit dysfunction in neuropsychiatric disorders. However, dynamic changes in FC related to locomotion with sensory feedback remain to be elucidated. To investigate FC dynamics in locomoting mice, we develop mesoscopic Ca2+ imaging with a virtual reality (VR) environment.
Nobuhiro Nakai, Masaaki Sato, Okito Yamashita, Yukiko Sekine, Xiaochen Fu, Junichi Nakai, Andrew Zalesky, Toru Takumi   +7 more
openaire   +2 more sources

A pilot trial to evaluate the clinical usefulness of contrast-enhanced ultrasound in predicting renal outcomes in patients with acute kidney injury.

PLoS ONE, 2020
ObjectivesContrast-enhanced ultrasound (CEUS) enables the assessment of real-time renal microcirculation. This study investigated CEUS-driven parameters as hemodynamic predictors for renal outcomes in patients with acute kidney injury (AKI).MethodsForty ...
Hye Eun Yoon, Da Won Kim, Dongryul Kim, Yaeni Kim, Seok Joon Shin, Yu Ri Shin   +5 more
doaj   +1 more source

Repeatability of Contrast-Enhanced Ultrasound to Determine Renal Cortical Perfusion

Diagnostics, 2022
Alterations in renal perfusion play a major role in the pathogenesis of renal diseases. Renal contrast-enhanced ultrasound (CEUS) is increasingly applied to quantify renal cortical perfusion and to assess its change over time, but comprehensive ...
Shatha J. Almushayt, Alisa Pham, Bethan E. Phillips, John P. Williams, Maarten W. Taal, Nicholas M. Selby   +5 more
doaj   +1 more source