منابع مشابه
Flexible head-casts for high spatial precision MEG
BACKGROUND In combination with magnetoencephalographic (MEG) data, accurate knowledge of the brain's structure and location provide a principled way of reconstructing neural activity with high temporal resolution. However, measuring the brain's location is compromised by head movement during scanning, and by fiducial-based co-registration with magnetic resonance imaging (MRI) data. The uncertai...
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In this work we present a comparison of two methods for tracking patients in imaging systems, whereby we concentrate on functional Magnetic Resonance Imaging (fMRI) and Magneto-Encephalography (MEG). Due to problems with magnetic fields from tracking systems, we rely on a stereo camera setup that is outside the critical region. One of the tracking approaches is based on bundle-adjustment, where...
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The present study investigates whether a minimal manipulation in task demands can induce core linguistic combinatorial mechanisms to extend beyond the bounds of normal grammatical phrases. Using magnetoencephalography, we measured neural activity evoked by the processing of adjective-noun phrases in canonical (red cup) and reversed order (cup red). During a task not requiring composition (verif...
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1 Introduction Magnetoencephalography (MEG) is currently used clinically for presurgical localization of epileptic tissue, based on signals from interictal spikes, using single equivalent current dipole (ECD) modeling [1,2,3,4]. There has been a long-standing question " Do interictal spikes co-localize to the same area as epileptic seizures? " Minassin, et al. found that the interictal MEG loca...
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To model the sources of measured magnetic fields, the relationship of the magnetic sensors to the head must be known [2]. This is usually accomplished by feeding currents through coils attached to the surface of the head [4]. The locations of the coils with respect to the sensor array are then computed on the basis of the measured signals. When evoked responses are studied, several responses us...
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ژورنال
عنوان ژورنال: Frontiers in Neuroscience
سال: 2010
ISSN: 1662-453X
DOI: 10.3389/conf.fnins.2010.06.00031