نتایج جستجو برای: spreading depression

تعداد نتایج: 168862  

Journal: :Optics express 2006
Chao Zhou Guoqiang Yu Daisuke Furuya Joel Greenberg Arjun Yodh Turgut Durduran

Diffuse optical correlation methods were adapted for three-dimensional (3D) tomography of cerebral blood flow (CBF) in small animal models. The image reconstruction was optimized using a noise model for diffuse correlation tomography which enabled better data selection and regularization. The tomographic approach was demonstrated with simulated data and during in-vivo cortical spreading depress...

Journal: :Annals of the New York Academy of Sciences 2002
Ugur Baysal Jens Haueisen

Spreading cortical depression (SCD) is a wave of depolarization that spreads across the cortex at 2-5 mm/min and is followed by a 5-10 minute reduction in EEG activity. It is assumed that SCD is involved in the pathophysiology of migraine. We present a new model and a visualization technique for the spread of excitation on realistic brain surfaces. The usefulness of the technique is demonstrate...

Journal: :Physiological reviews 2015
Cenk Ayata Martin Lauritzen

Spreading depression (SD) is a transient wave of near-complete neuronal and glial depolarization associated with massive transmembrane ionic and water shifts. It is evolutionarily conserved in the central nervous systems of a wide variety of species from locust to human. The depolarization spreads slowly at a rate of only millimeters per minute by way of grey matter contiguity, irrespective of ...

2008
J. Paulson H. Jung M. Raeth - Knight J. Linn

INTRODUCTION Alfalfa is the primary forage fed to lactating dairy cows; however, there is renewed interest in utilizing grass forages in lactating dairy cow diets particularly because of farm nutrient management issues. Yield and perceived quality is generally lower for grass species compared to legumes while other agronomic factors such as longer stand life, requirement for nitrogen fertilizer...

Journal: :Geospatial health 2009
Roberta Infascelli Raffaele Pelorosso Lorenzo Boccia

Nitrate concentration in groundwater has frequently been linked to non-point pollution. At the same time the existence of intensive agriculture and extremely intensive livestock activity increases the potential for nitrate pollution in shallow groundwater. Nitrate used in agriculture could cause adverse effects on human and animal health. In order to evaluate the groundwater nitrate pollution, ...

Journal: :Science 2008
Scott L Murchie Thomas R Watters Mark S Robinson James W Head Robert G Strom Clark R Chapman Sean C Solomon William E McClintock Louise M Prockter Deborah L Domingue David T Blewett

The Caloris basin, the youngest known large impact basin on Mercury, is revealed in MESSENGER images to be modified by volcanism and deformation in a manner distinct from that of lunar impact basins. The morphology and spatial distribution of basin materials themselves closely match lunar counterparts. Evidence for a volcanic origin of the basin's interior plains includes embayed craters on the...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2013
Chang Quan Lai Trong Thi Mai H Zheng P S Lee K C Leong Chengkuo Lee W K Choi

The dynamics of droplet spreading on two-dimensional wicking surfaces were studied using square arrays of Si nanopillars. It was observed that the wicking film always precedes the droplet edge during the spreading process causing the droplet to effectively spread on a Cassie-Baxter surface composed of solid and liquid phases. Unlike the continual spreading of the wicking film, however, the drop...

1994
C H Perry R W Picard

We present a new technique for re synthesis which combines a model for ames with a model for ame spreading. For the ame model, we show that minor changes to traditional particle system techniques exhibit signiicant improvements in realism , with little to no extra rendering costs. For ame spreading, we model physically-based evolution of the boundary between burning and non-burning regions of p...

2012
Korhan Levent Ertürk Gökhan Şengül

We developed 3D simulation software of human organs/tissues; we developed a database to store the related data, a data management system to manage the created data, and a metadata system for the management of data. This approach provides two benefits: first of all the developed system does not require to keep the patient's/subject's medical images on the system, providing less memory usage. Bes...

2012
Christoph Drenckhahn Maren K. L. Winkler Sebastian Major Michael Scheel Eun-Jeung Kang Alexandra Pinczolits Cristian Grozea Jed A. Hartings Johannes Woitzik Jens P. Dreier

It has been known for decades that suppression of spontaneous scalp electroencephalographic activity occurs during ischaemia. Trend analysis for such suppression was found useful for intraoperative monitoring during carotid endarterectomy, or as a screening tool to detect delayed cerebral ischaemia after aneurismal subarachnoid haemorrhage. Nevertheless, pathogenesis of such suppression of acti...

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