Results 11 to 20 of about 288,510 (339)

Stress response regulation and the hemodynamic response [PDF]

Proceedings of the National Academy of Sciences, 2018
Stress is among the most important risk factors for a variety of mood and anxiety disorders (1, 2), but the underlying neurobiological mechanisms remain incompletely understood, especially in humans. Previous human neuroimaging studies have identified a network of brain regions that exhibit increased activity and blood flow in response to acute ...
Katharine, Dunlop, Conor, Liston
openaire   +2 more sources

Hyperpolarized ¹²⁹Xe Time-of-Flight MR Imaging of Perfusion and Brain Function

Diagnostics, 2020
Perfusion measurements can provide vital information about the homeostasis of an organ and can therefore be used as biomarkers to diagnose a variety of cardiovascular, renal, and neurological diseases.
Yurii Shepelytskyi, Francis T. Hane, Vira Grynko, Tao Li, Ayman Hassan, Mitchell S. Albert   +5 more
doaj   +1 more source

Acute physical and mental stress resulted in an increase in fatty acids, norepinephrine, and hemodynamic changes in normal individuals: A possible pathophysiological mechanism for hypertension—Pilot study

The Journal of Clinical Hypertension, 2021
Hypertension is often associated with metabolic changes. The sustained increase in sympathetic activity is related to increased blood pressure and metabolic changes.
Josiane Motta e Motta, Ludmila Neves Souza, Bianca Bassetto Vieira, Humberto Delle, Fernanda Marciano Consolim‐Colombo, Brent M. Egan, Heno Ferreira Lopes   +6 more
doaj   +1 more source

Comparability of Functional MRI Response in Young and Old During Inhibition [PDF]

, 2004
When using fMRI to study age-related cognitive changes, it is important to establish the integrity of the hemodynamic response because, potentially, it can be affected by age and disease.
Garavan, Hugh, Langenecker, Scott Aaron, Nielson, Kristy A., Rao, Stephen M., Ross, Thomas J., Stein, Elliot   +5 more
core   +2 more sources

Hemodynamic Responses during Enduro-Motorcycling Performance [PDF]

Frontiers in Physiology, 2017
Much of the information available in the literature on physiological responses during Enduro motorcycling is related to heart rate (HR) and blood lactate (BLa). The aim of this work was to investigate the hemodynamic changes that occur during a 10-min session of Enduro motorcycling. Fifteen skilled riders were enrolled on the study and all participants
Sanna, Irene, PINNA, VIRGINIA, Milia, Raffaele, Roberto, Silvana, Olla, Sergio, Mulliri, Gabriele, Crisafulli, Antonio   +6 more
openaire   +4 more sources

HRF estimation improves sensitivity of fMRI encoding and decoding models [PDF]

, 2013
Extracting activation patterns from functional Magnetic Resonance Images (fMRI) datasets remains challenging in rapid-event designs due to the inherent delay of blood oxygen level-dependent (BOLD) signal. The general linear model (GLM) allows to estimate
Eickenberg, Michael, Gramfort, Alexandre, Pedregosa, Fabian, Thirion, Bertrand   +3 more
core   +3 more sources

Effect of one minimum alveolar concentration sevoflurane with and without fentanyl on hemodynamic response to laryngoscopy and tracheal intubation

Journal of Anaesthesiology Clinical Pharmacology, 2011
Background : Drug combinations can be used for optimum obtundation of the hemodynamic response to tracheal intubation. The objective of this trial was to compare the hemodynamic response to laryngoscopy and tracheal intubation after administration of 2 ...
Anwar Hoda, Fauzia A Khan
doaj   +1 more source

Hemodynamically informed parcellation of cerebral FMRI data [PDF]

, 2014
Standard detection of evoked brain activity in functional MRI (fMRI) relies on a fixed and known shape of the impulse response of the neurovascular coupling, namely the hemodynamic response function (HRF).
Ciuciu, Philippe, Forbes, Florence, Frau-Pascual, Aina, Vincent, Thomas   +3 more
core   +5 more sources

Physiological models comparison for the analysis of ASL FMRI data [PDF]

, 2015
International audiencePhysiological models have been proposed to describe the processes that underlie the link between neural and hemodynamic activity in the brain.
Ciuciu, Philippe, Forbes, Florence, Frau-Pascual, Aina   +2 more
core   +3 more sources

Investigation of the Pattern of the Hemodynamic Response as Measured by Functional Near-Infrared Spectroscopy (fNIRS) Studies in Newborns, Less Than a Month Old: A Systematic Review

Frontiers in Human Neuroscience, 2018
It has been 20 years since functional near-infrared spectroscopy (fNIRS) was first used to investigate the evoked hemodynamic response to a stimulus in newborns.
Isabel de Roever, Gemma Bale, Subhabrata Mitra, Judith Meek, Nicola J. Robertson, Ilias Tachtsidis   +5 more
doaj   +1 more source