نتایج جستجو برای: hemodynamic response function
تعداد نتایج: 2085600 فیلتر نتایج به سال:
Estimates of hemodynamic amplitude, delay, and width were combined to investigate system dynamics involved in lexical decision making. Subjects performed a lexical decision task using word and nonword stimuli rotated 0 degrees, 60 degrees, or 120 degrees. Averaged hemodynamic responses to repeated stimulation were fit to a Gamma-variate function convolved with a heavyside function of varying on...
Removing the Effect of Hemodynamic Response Function in Joint Factorization of EEG and fMRI Datasets
Automatic dysfunction may contribute to the hemodynamic disturbances in cirrhosis. Tests of autonomic function were performed in 31 patients with non-alcoholic cirrhosis and 30 healthy subjects. Patients were divided into 3 groups according to child- Pugh,s classification ( A.B.C). The patients with moderate and severe cirrhosis( child B,C) had significant parasympathetic disturbance ( in the v...
Malaria is an infectious protozoan parasitic disease transmitted by Anopheles spp mosquito. As a entity, malaria still major global health problem due to its morbidity and mortality that endangered millions of individuals inhabitants in tropical region. Kidney derangement moderately frequent severe caused the species P. falciparum also malariae, but seldom this condition has been reported vivax...
Cardiac hypertrophy is a common response to injury and hemodynamic stress and an important harbinger of heart failure and death. Herein, we identify the Kruppel-like factor 15 (KLF15) as an inhibitor of cardiac hypertrophy. Myocardial expression of KLF15 is reduced in rodent models of hypertrophy and in biopsy samples from patients with pressure-overload induced by chronic valvular aortic steno...
Brain aging is characterized by changes in both hemodynamic and neuronal responses, which may be influenced by the cardiorespiratory fitness of the individual. To investigate the relationship between neuronal and hemodynamic changes, we studied the brain activity elicited by visual stimulation (checkerboard reversals at different frequencies) in younger adults and in older adults varying in phy...
fMRI is increasingly used to monitor the modulating effects of pharmacological agents on human brain function [1]. Often a generalized linear model approach [2] (e.g. SPM, http://www.fil.ion.ucl.ac.uk/spm/) is applied to analyze fMRI data. Within this toolbox, a canonical form of the hemodynamic response function (HRF) is used as a standard regressor to analyze the signal course of the measured...
The initial stages of diabetic nephropathy are characterized by glomerular hyperfiltration and hypertension, processes that have been linked to initiation and progression of renal disease. Renin angiotensin system (RAS) blockade is commonly used to modify the hyperfiltration state and delay progression of renal disease. Despite this therapy, many patients progress to ESRD, suggesting heterogene...
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