Results 201 to 210 of about 270,525 (249)
Some of the next articles are maybe not open access.
Data quality in fMRI and simultaneous EEG–fMRI
Magnetic Resonance Materials in Physics, Biology and Medicine, 2014To evaluate functional magnetic resonance imaging (fMRI) and simultaneous electroencephalography (EEG)-fMRI data quality in an organization using several magnetic resonance imaging (MRI) systems.Functional magnetic resonance imaging measurements were carried out twice with a uniform gel phantom on five different MRI systems with field strengths of 1.5 ...
Kuusela Linda +11 more
openaire +2 more sources
Movement‐Related effects in fMRI time‐series
Magnetic Resonance in Medicine, 1996This paper concerns the spatial and intensity transformations that are required to adjust for the confounding effects of subject movement during functional MRI (fMRI) activation studies. An approach is presented that models, and removes, movement‐related
Karl J. Friston +4 more
semanticscholar +1 more source
Trends in Neurosciences, 2007
Conventional functional magnetic resonance imaging (fMRI) is a blunt tool for studying the nervous system because it measures neural activity only indirectly, by way of hemodynamics and neurovascular coupling. Several alternative, nonhemodynamic functional imaging methods are now being explored.
openaire +2 more sources
Conventional functional magnetic resonance imaging (fMRI) is a blunt tool for studying the nervous system because it measures neural activity only indirectly, by way of hemodynamics and neurovascular coupling. Several alternative, nonhemodynamic functional imaging methods are now being explored.
openaire +2 more sources
Simultaneous EEG and fMRI Recordings (EEG-fMRI)
2013Scalp EEG is characterised by a limited spatial resolution and by a low sensitivity to generators distant from the cortical surface. In contrast, fMRI is characterised by a good spatial resolution and it is sensitive to signal of deep brain structures. By combining EEG with fMRI, it is possible to detect blood oxygenation level-dependent (BOLD) signal ...
Friederike Moeller +2 more
openaire +1 more source
International Anesthesiology Clinics, 2016
BOLD activation studies discussed vary in the anesthetic agent studied (propofol, sevoflurane, and isoflurane), the concentration of the anesthetic (mostly under 0.5MAC or equivalent doses), and the activation paradigm/functional activation. The data analysis technique also differs between the studies.
Cheuk Ying, Tang, Ramachandran, Ramani
openaire +2 more sources
BOLD activation studies discussed vary in the anesthetic agent studied (propofol, sevoflurane, and isoflurane), the concentration of the anesthetic (mostly under 0.5MAC or equivalent doses), and the activation paradigm/functional activation. The data analysis technique also differs between the studies.
Cheuk Ying, Tang, Ramachandran, Ramani
openaire +2 more sources
Neuroscience & Biobehavioral Reviews, 2006
Acquisition of electroencephalogram (EEG) during functional magnetic resonance imaging (fMRI) provides an additional monitoring tool for the analysis of brain state fluctuations. The exploration of brain responses following inputs or in the context of state changes is crucial for a better understanding of the basic principles governing large-scale ...
Petra, Ritter, Arno, Villringer
openaire +2 more sources
Acquisition of electroencephalogram (EEG) during functional magnetic resonance imaging (fMRI) provides an additional monitoring tool for the analysis of brain state fluctuations. The exploration of brain responses following inputs or in the context of state changes is crucial for a better understanding of the basic principles governing large-scale ...
Petra, Ritter, Arno, Villringer
openaire +2 more sources
2016
The field of pain research has progressed immensely due to the advancement of brain imaging techniques. The initial goal of this research was to expand our understanding of the cerebral mechanisms underlying the perception of pain; more recently the research objectives have shifted toward chronic pain – understanding its origins, developing methods for
Duerden EG +4 more
openaire +1 more source
The field of pain research has progressed immensely due to the advancement of brain imaging techniques. The initial goal of this research was to expand our understanding of the cerebral mechanisms underlying the perception of pain; more recently the research objectives have shifted toward chronic pain – understanding its origins, developing methods for
Duerden EG +4 more
openaire +1 more source
2014
Blood oxygenation level dependent functional magnetic resonance imaging (BOLD fMRI) is widely used by the neuroimaging community for studies of the brain, but remains controversial in the spinal cord despite demonstrations of technical feasibility. As yet the majority of motor studies have focussed on hand movement or finger tapping, while painful and ...
Summers, Paul E. +2 more
openaire +2 more sources
Blood oxygenation level dependent functional magnetic resonance imaging (BOLD fMRI) is widely used by the neuroimaging community for studies of the brain, but remains controversial in the spinal cord despite demonstrations of technical feasibility. As yet the majority of motor studies have focussed on hand movement or finger tapping, while painful and ...
Summers, Paul E. +2 more
openaire +2 more sources
2019
Objective detection of deception was extensively studied, starting from polygraph to more modern techniques, the functional MR (fMRI), and they are based on neural (sympathetic) activation that is evoked in stressful conditions, such as lying. The role of fMRI in neurophysiology has been extensively developed and studied, and its principles lie in the ...
La Tona G. +6 more
openaire +2 more sources
Objective detection of deception was extensively studied, starting from polygraph to more modern techniques, the functional MR (fMRI), and they are based on neural (sympathetic) activation that is evoked in stressful conditions, such as lying. The role of fMRI in neurophysiology has been extensively developed and studied, and its principles lie in the ...
La Tona G. +6 more
openaire +2 more sources