Neural correlates of different behavioral response to transcranial direct current stimulation between patients in the unresponsive wakefulness syndrome and minimally conscious state.
Neurol Sci
; 41(1): 75-82, 2020 Jan.
Article
en En
| MEDLINE
| ID: mdl-31422504
ABSTRACT
In this study, we used event-related potential (ERP) and 18F-fluorodeoxyglucose-positron emission tomography (FDG-PET) to study the neural correlates of different behavioral response to transcranial direct current stimulation (tDCS) between patients in unresponsive wakefulness syndrome (UWS) and minimally conscious state (MCS). Thirteen patients (eight in UWS and five in MCS) underwent 20 anodal tDCS sessions of the left dorsolateral prefrontal cortex (DLPFC). Before tDCS, all the patients and six age-matched healthy subjects underwent a cerebral FDG-PET scan and ERP test. The coma recovery scale-revised (CRS-R) results revealed that after tDCS, a significant improvement was observed only in the MCS group. The ERP results supported that MCS patients preserved more high-order cortical information processing capacities. The residual brain metabolism in the left DLPFC in MCS patients supported that a residual brain activity in the stimulated area was necessary for a behavioral response to tDCS. Our study also demonstrated that the cerebral metabolic rates of glucose (CMRgl) ratios in intrinsic network were correlated significantly with CRS-R in MCS patients. In addition, the right prefrontal region might be another potential therapeutic target for MCS patients.
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Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Vigilia
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Encéfalo
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Estado Vegetativo Persistente
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Estimulación Transcraneal de Corriente Directa
Tipo de estudio:
Etiology_studies
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Incidence_studies
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Observational_studies
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Risk_factors_studies
Límite:
Adult
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Aged
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
Neurol Sci
Asunto de la revista:
NEUROLOGIA
Año:
2020
Tipo del documento:
Article