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INTRODUCTION During recent years we have seen the birth and development of a technique destined to revolutionize the world of the neurosciences, functional magnetic resonance (fMR). This new technique presents many challenges, both from the hardware point of view (little signal, relatively limited spatial and temporal resolution, artefacts, etc.) and of(More)
BACKGROUND AND PURPOSE Blood oxygenation level-dependent (BOLD) functional MRI (fMRI) is a promising method for defining brain recovery after stroke quantitatively. Applications thus far have assumed that the BOLD hemodynamic response in patients after stroke is identical to that in healthy controls. However, because of local vascular compromise or more(More)
BACKGROUND AND PURPOSE Further recovery from stroke can occur late, long after the end of the apparent evolution of pathological changes. This observation and evidence obtained from functional imaging for altered patterns of activation after brain injury suggest that cortical reorganization may contribute to recovery. Here, we have tested for potentially(More)
BACKGROUND AND PURPOSE Infarct size on T2-weighted MRI correlates only modestly with outcome, particularly for small strokes. This may be largely because of differences in the locations of infarcts and consequently in the functional pathways that are damaged. To test this hypothesis quantitatively, we developed a "mask" of the corticospinal pathway to(More)
  • Fco. Mario Barcala Rodrı́guez, Eva Domı́nguez Noya, +6 authors R. Piñeiro
  • 2007
In this paper, we describe the compilation and structure of two linguistic resources, a corpus and a dictionary of terms of the field of economy, developed for Galician. Together with this, we describe the use of these resources for the automatical extraction of multi-word terms by means of a combination of linguistic and statistical techniques. While doing(More)
Sentence word segmentation and Part-OfSpeech (POS) tagging are common preprocessing tasks for many Natural Language Processing (NLP) applications. This paper presents a practical application for POS tagging and segmentation disambiguation using an extension of the one-pass Viterbi algorithm called Viterbi-N. We introduce the internals of the developed(More)
In this paper, we introduce a tagger environment for Galician, the native language of Galicia. Galician belongs to the group of Romance languages which developed from the Latin imposed on the north-west of the Iberian Peninsula by the Romans, with additions from the languages of peoples living here before the colonization, as well as contributions from(More)
INTRODUCTION AND OBJECTIVES We present a review on the technical, methodological and clinical advances in the functional study of the brain by means of magneto-encephalography. We look back the milestones of its historical development, through the work of the major research groups on this field and through our group's works and database (including doctoral(More)
INTRODUCTION Various strategies are used to increase the sensitivity to activation in functional magnetic resonance (RMf) with bold contrast, including raised magnetic fields and group analysis. Although very important, study of the behaviour of the signal in a group (normal pattern) remains a problem in RMf. OBJECTIVES To study the behaviour of the(More)