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Title: Combination of diffusion tensor and functional magnetic resonance imaging during recovery from the vegetative state
Author: Fernández-Espejo, Davinia
Junqué i Plaja, Carme, 1955-
Cruse, Damian
Bernabeu, Montserrat
Roig-Rovira, Teresa
Fàbregas Julià, Neus
Rivas, Eva
Mercader, José M.
Keywords: Neurologia
Mort cerebral
Brain death
Issue Date: 2010
Publisher: BioMed Central
Abstract: Background: The rate of recovery from the vegetative state (VS) is low. Currently, little is known of the mechanisms and cerebral changes that accompany those relatively rare cases of good recovery. Here, we combined functional magnetic resonance imaging (fMRI) and diffusion tensor imaging (DTI) to study the evolution of one VS patient at one month post-ictus and again twelve months later when he had recovered consciousness. Methods fMRI was used to investigate cortical responses to passive language stimulation as well as task-induced deactivations related to the default-mode network. DTI was used to assess the integrity of the global white matter and the arcuate fasciculus. We also performed a neuropsychological assessment at the time of the second MRI examination in order to characterize the profile of cognitive deficits. Results: fMRI analysis revealed anatomically appropriate activation to speech in both the first and the second scans but a reduced pattern of task-induced deactivations in the first scan. In the second scan, following the recovery of consciousness, this pattern became more similar to that classically described for the default-mode network. DTI analysis revealed relative preservation of the arcuate fasciculus and of the global normal-appearing white matter at both time points. The neuropsychological assessment revealed recovery of receptive linguistic functioning by 12-months post-ictus. Conclusions: These results suggest that the combination of different structural and functional imaging modalities may provide a powerful means for assessing the mechanisms involved in the recovery from the VS.
Note: Reproducció del document publicat a
It is part of: BMC Neurology 2010, 10:77
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ISSN: 1471-2377
Appears in Collections:Articles publicats en revistes (Medicina)
Articles publicats en revistes (Fonaments Clínics)
Articles publicats en revistes (Psicologia Clínica i Psicobiologia)

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