نتایج جستجو برای: vascular density

تعداد نتایج: 621090  

Journal: :Neuron 2014
Baptiste Lacoste Cesar H. Comin Ayal Ben-Zvi Pascal S. Kaeser Xiaoyin Xu Luciano da F. Costa Chenghua Gu

Neurovascular interactions are essential for proper brain function. While the effect of neural activity on cerebral blood flow has been extensively studied, whether or not neural activity influences vascular patterning remains elusive. Here, we demonstrate that neural activity promotes the formation of vascular networks in the early postnatal mouse barrel cortex. Using a combination of genetics...

Journal: :Investigative ophthalmology & visual science 2010
Patricia Parsons-Wingerter Krishnan Radhakrishnan Mary B Vickerman Peter K Kaiser

PURPOSE Vascular dropout and angiogenesis are hallmarks of the progression of diabetic retinopathy (DR). However, current evaluation of DR relies on grading of secondary vascular effects, such as microaneurysms and hemorrhages, by clinical examination instead of by evaluation of actual vascular changes. The purpose of this study was to map and quantify vascular changes during progression of DR ...

2011
Chuanming Li Hanjian Du Jian Zheng Jian Wang

BACKGROUND AND PURPOSE The present study was designed to detect the abnormalities of the cerebral grey-matter density in subcortical ischemic vascular dementia patients by FSL-VBM method to promote the early diagnosis of it. METHODS Nine subcortical ischemic vascular dementia patients and nine age-matched normal controls underwent MRI brain structure scanning that was performed on a SIEMENS A...

Journal: :The journal of family planning and reproductive health care 2007
Masoumeh Simbar Fahimeh Ramezani Tehrani Zeinab Hashemi Hananeh Zham Ian S Fraser

OBJECTIVES The most common reason for discontinuation of long-acting progestogen-only contraceptives is irregular bleeding following local endometrial vascular changes. To reduce unpredictable bleeding episodes among depot medroxyprogesterone acetate (DMPA) users, the combined injectable contraceptive, Cyclofem, was offered as an alternative. However, there is a gap in our knowledge about the e...

2013
Molly R. Kelly-Goss Richard S. Sweat Mohammad S. Azimi Walter L. Murfee

OBJECTIVE Angiogenesis is the growth of new vessels from pre-existing vessels and commonly associated with two modes: capillary sprouting and capillary splitting. Previous work by our laboratory suggests vascular island incorporation might be another endothelial cell dynamic involved in microvascular remodeling. Vascular islands are defined as endothelial cell segments disconnected from nearby ...

Journal: :Anticancer research 2011
Klaus-Peter Dieckmann Werner Jan Struss Ulrich Budde

BACKGROUND Acute early vascular toxicity of chemotherapy for germ cell tumour (GCT) is poorly understood. To explore the pathogenesis of this complication we evaluated laboratory parameters associated with vascular disease. PATIENTS AND METHODS In 33 GCT patients the following parameters were investigated with routine laboratory methods before and after chemotherapy: von Willebrand factor ant...

Journal: :Investigative ophthalmology & visual science 2018
Paula K Yu Zaid Mammo Chandrakumar Balaratnasingam Dao-Yi Yu

Purpose To precisely quantify the macular microvasculature density using microperfusion and labeling techniques in human donor eyes. Such information may be useful in understanding the role of the macular microvasculature in coping with the metabolic requirements of the neurons in this densely packed region, and provide a reference point for clinical studies using recently developed optical ima...

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