Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 221 for “"functional magnetic resonance imaging (fMRI)"”.
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Signal processing in functional magnetic resonance imaging (fMRI) of the brain
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.
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Somatotopic mapping of the human somatosensory cortex using functional magnetic resonance imaging (fMRI)
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
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Improved Methods for Motion-Compensating and Event-Related Spinal Functional Magnetic Resonance Imaging (fMRI)
Functional magnetic resonance imaging (fMRI) has become a widely used technique for non-invasive brain mapping, and methods have now evolved to allow fMRI of the spinal cord (spinal fMRI) as well. With the goal of improving spinal fMRI, the studies presented herein have investigated potential …
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False memories : a study of false recognitions caused by a stimulus film using functional magnetic resonance imaging (fMRI)
In der vorliegenden Arbeit wurde das Phänomen von falschen Rekognitionen untersucht. Falsche Rekognitionen beschreiben das falsche Wiedererkennen eines nicht gelernten Stimulus. Rekognitionsleistungen sind z.B. auch von Bedeutung bei der Befragung von Augenzeugen. Hierbei können auch kleinere …
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Investigation of neural correlates of bladder control using functional magnetic resonance imaging (fMRI) in patients with overactive bladder (OAB)
… There is some preliminary evidence using functional magnetic resonance imaging (fMRI) that the brain response to bladder filling in OAB patients is abnormal. The purpose of this research is to determine whether there are Central Nervous System (CNS) differences in modulating bladder …
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Characterizing the spatiotemporal profile and the level of abstractness of action representations: neural decoding of magnetoencephalography (MEG) and functional magnetic resonance imaging (fMRI) data
… In this thesis, I report three neuroimaging studies in which we used magnetoencephalography (MEG) and functional magnetic resonance imaging (fMRI) to characterize the temporal dynamics of abstract representations of observed actions (Study 1 and 2), meaning that generalize across …
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Correcting the variations of bold signal due to susceptibility-induced magnetic field gradients and its application
Functional magnetic resonance imaging (fMRI) using blood oxygenation level dependent (BOLD) signals is a tool that is currently used in many cognitive neuroscience studies. However, many studies do not consider susceptibility-induced magnetic field gradients. Susceptibility-induced magnetic field …
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A generative model for activations in functional MRI
Detection of brain activity and selectivity using functional magnetic resonance imaging (fMRI) provides unique insight into the underlying functional properties of the brain. We propose a generative model that jointly explains neural activation and temporal activity in an fMRI experiment. We derive …
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Issues in the processing and analysis of functional NIRS imaging and a contrast with fMRI findings in a study of sensorimotor deactivation and connectivity
… the processing and analysis of continuous wave functional linear infrared spectroscopy (fNIRS) of the brain usung the DYNOT system. In the second part, the same sensorimotor experiment is carried out using functional magnetic resonance imaging (fMRI) and near infrared spectroscopy in eleven of …
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A Model-Free Approach for Classification of fMRI Brain Images
… subjects into predefined groups based on functional magnetic resonance imaging (fMRI) data. Classification of subjects into predefined groups, such as patient vs. control, based on their functional MRI data is a potentially useful procedure for ensuring homogeneous research samples and for …
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An information theoretic approach to EEG-fMRI integration
… signals from electro-encephalography (EEG) and functional magnetic resonance imaging (fMRI), acquired simultaneously from the same observer, holds great potential for the elucidation of the neurobiological underpinnings of human brain function. However, the most appropriate way in which to …
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Words and rules in the brain
… and irregular past tense generation. Two neuroimaging techniques, magnetoencephalography (MEG) and functional magnetic resonance imaging (fMRI) were used to test healthy, right-handed subjects who were native speakers of English in a past tense production paradigm, in addition to a lexical …
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Bayesian population inference for effective connectivity
… (MAR) process is proposed to jointly model functional neuroimaging time series collected from multiple subjects, and to characterize the distribution of MAR coefficients across the population from which those subjects were drawn. Thus, model-based inference about the interaction between …
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Deformation-invariant sparse coding
… deformations. We apply our proposed method on functional magnetic resonance imaging (fMRI) data, where the locations of functional regions in the brain evoked by a specific cognitive task may vary across individuals relative to anatomy. For a language fMRI study, our method identifies …
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Obtaining optimal data length for FMRI images
… in state of the art research within the field of functional Magnetic Resonance Imaging (fMRI). FMRI enables research to be conducted on brain mapping in healthy individuals, as well as in patient populations. The need for accurate functional images is required. The primary objective was the …
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Clustering Methods for Delineating Regions of Spatial Stationarity
… further investigate data extracted by the use of Functional Magnetic Resonance Imaging (FMRI) as it is applied to brain tissue and how it measures blood flow to certain areas of the brain following the application of a stimulus. As a precursor to detailed spatial analysis of this kind of data, …
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DIETARY AND EXERCISE EFFECTS ON NEURAL RESPONSES TO VISUAL FOOD STIMULI IN OVERWEIGHT AND OBESE ADULTS
Results from human neuroimaging studies consistently demonstrate that obesity is associated with altered neural reward processing of food-relevant cues. These observations have caused some investigators to question whether behavioral interventions such as dietary manipulations or physical activity …
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Resting State Functional Magnetic Resonance and Diffusion Tensor Imaging of Hemiplegic Cerebral Palsy Patients Treated with Constraint-Induced Movement Therapy: Predictors and Clinically Correlated Evidence of Neuroplasticity
… to an untreated control group. Resting state functional magnetic resonance imaging (fMRI) and diffusion tensor imaging (DTI) acquisitions quantify global network organization and neural integrity, respectively, and found alterations in multiple resting state network connectivity patterns and …
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Resource allocation of the human brain : a competitive equilibrium approach
… CE are mathematically adjusted to be used with functional magnetic resonance imaging (FMRI) data. The current study uses imaging data were subjects are requested to selectively attend and respond to either a visual or auditory metronome in the presence of asynchronous cross-modal distractors. …
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Multiple detector wireless FNIRS sensor to detect hemodynamic activity
… non-invasive and flexible technique, "functional Near Infra-Red Spectroscopy" (fNIRS), has opened new opportunities for the study of brain functionality. This powerful method uses the optical properties of a tissue at multiple near infra-red wavelengths to dynamically determine the …
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