Optical Imaging of Brain Function and Metabolism 2
Physiological Basis and Comparison to Other Functional Neuroimaging Methods
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40 Result(s)
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Chapter
EEG Quality:The Image Acquisition Artefact
In this chapter, we focus on the artefacts that arise in the EEG during the fMRI acquisition process. Functional MRI using echo planar imaging (EPI) sequences involves the application of rapidly varying magnet...
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Open Access This content is freely available online to anyone, anywhere at any time.
Article
Prospective study on the mismatch concept in acute stroke patients within the first 24 h after symptom onset - 1000Plus study
The mismatch between diffusion weighted imaging (DWI) lesion and perfusion imaging (PI) deficit volumes has been used as a surrogate of ischemic penumbra. This pathophysiology-orientated patient selection crit...
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Article
Dysfunction of ventral striatal reward prediction in schizophrenic patients treated with typical, not atypical, neuroleptics
Clinical studies in patients with schizophrenia suggest that atypical neuroleptics are more effective than typical neuroleptics in reducing negative symptoms including apathy and anhedonia. Dysfunction of the ...
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Article
Kompetenznetz Schlaganfall: Forschen—Fördern—Vernetzen
Der Schlaganfall ist die häufigste neurologische Erkrankung, eine der häufigsten Ursachen für Behinderung und die dritthäufigste Todesursache in Deutschland. Nur durch die Koordination von Prävention, Akutbeha...
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Chapter
Are VEP Correlated Fast Optical Signals Detectable in the Human Adult by Non-Invasive Nearinfrared Spectroscopy (NIRS)?
The potential of near infrared spectroscopy (NIRS) to detect vascular changes in cerebral cortical tissue elicited by functional stimulation has been established (1). The vascular response is considered the re...
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Article
Perfusion and diffusion magnetic resonance imaging in human cerebral venous thrombosis
Background Diagnosis of cerebral venous thrombosis (CVT) is usually achieved by digital subtraction angiography or magnetic resonance angiography, while structural brain tissue damage can be assessed by computed...
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Chapter and Conference Paper
Cerebral Blood Flow, Hemoglobin Oxygenation, and Water Diffusion Changes During Stroke: Fingerprinting with Near-Infrared Spectroscopy and MRI
Stroke is caused by a disorder of brain blood flow and a concomitant reduction in substrate delivery, particularly of oxygen. Cerebral blood flow and hemoglobin oxygenation can be monitored in patients by noni...
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Chapter
Cortical Blood Oxygenation Changes in the Left and Right Occipital Area Induced by Selective Visual Stimuli in Humans
In the last few years near infrared spectroscopy (NIRS) has become a more widespread tool to map the human brain function, in particular the motor cortex areas (Gratton et al., 1995; Hirth et al., 1996; Obrig ...
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Article
Effects of repetitive transcranial magnetic stimulation over dorsolateral prefrontal and posterior parietal cortex on memory-guided saccades
We investigated the role of the dorsolateral prefrontal cortex (DLPFC) and the posterior parietal cortex (PPC) in a visuospatial delayed-response task in humans. Repetitive transcranial magnetic stimulation (2...
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Book
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Chapter
Simultaneous Assessment of Cerebral Oxygenation and Hemodynamics During a Motor Task
During performance of a sequential finger opposition task we measured changes in regional cerebral blood oxygenation (rCBO) over the motor cortex and blood flow velocity changes (CBFV) in the middle cerebral a...
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Chapter
Towards Brain Mapping Combining Near-Infrared Spectroscopy and High Resolution 3D MRI
Neuronal activation is coupled to localised changes in regional cerebral blood flow, blood oxygenation and metabolism (Leninger-Follert et al. 1979, Frostig et al. 1990). On this basis it is possible to detect...
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Chapter
Length of Resting Period Between Stimulation Cycles Modulates Hemodynamic Response to a Motor Stimulus
The influence of different lengths of the pre-stimulation resting period on the magnitude of a hemodynamic response evoked by motor stimulation was examined in 10 subjects by means of near-infrared spectroscop...
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Chapter
Assessment of Local Brain Activation
In five healthy human subjects, near-infrared spectroscopy (NIRS) and positron emission tomography (PET) examinations were performed simultaneously. Changes in [oxy-Hb], [deoxy-Hb] and [total-Hb] as measured b...
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Chapter
Functional Neuroimaging
Optical methods assess different types of light tissue interactions such as light absorption, fluorescence, phosphoresence, scattering, and Doppler shift. In this article, it is reviewed how these different ty...
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Chapter
Near-Infrared Spectroscopy in Functional Activation Studies
Near infrared spectroscopy (NIRS) has recently been used in functional activation studies as a non-invasive tool to monitor changes in cerebral oxygenation in human adults1–6. If NIRS is to establish its place in...
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Chapter
Understanding Functional Neuroimaging Methods Based on Neurovascular Coupling
Functional neuroimaging techniques are usually grouped according to the employed apparatus into functional magnetic resonance imaging techniques (fMRI), nuclear medicine approaches such as single photon emissi...
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Chapter
Cerebral Oxygenation Changes During Motor and Somatosensory Stimulation in Humans, as Measured by Near-Infrared Spectroscopy
Functional cortical activation is coupled to changes of cerebral hemodynamics and metabolism. These changes have been used in positron emission tomography and recently developed functional magnetic resonance t...
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Chapter
Cerebral Sinus Venous Thrombosis
The traditional view of thrombosis of the cerebral veins and/or sinuses (SVT) is that of a rare disease, difficult to diagnose, difficult to treat, and with a poor prognosis. Based on a number of recent findin...
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