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Descripción
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| Fixation-off sensitivity (FOS) denotes the forms of EEG abnormalities, which are elicited by elimination of central vision or fixation. The phenomenon seems to depend on variables that modulate the alpha rhythm, however, the cerebral mechanisms underlying FOS remain unclear [1]. The scarce previous fMRI findings related to FOS have shown activation in extrastriate cortex [2] and also in frontal areas [3][4]. On the other hand, simultaneous EEG-fMRI technique has been used to assess the relationship between spontaneous power fluctuations of electrical rhythms and associated fMRI signal modulations. These studies have identified that lateral frontoparietal networks show a negative correlation with alpha band in healthy subjects. This neuroanatomical pattern is related to attentional processes and cognitive resources. Moreover, a sub-beta band (17-23 Hz) has been identified with posterior cingulate, temporoparietal junction and dorso-medial prefrontal cortex activations, which correspond to the DMN. | |
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Internacional
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Si |
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Nombre congreso
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International Society for Magnetic Resonance Imaging in Medicine |
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Tipo de participación
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960 |
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Lugar del congreso
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MELBOURNE, AUSTRALIA |
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Revisores
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Si |
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ISBN o ISSN
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1557-3672 |
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DOI
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Fecha inicio congreso
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05/05/2012 |
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Fecha fin congreso
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11/05/2012 |
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Desde la página
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370 |
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Hasta la página
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371 |
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Título de las actas
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Proceedings of the International Society for Magnetic Resonance Imaging in Medicine |