Temporal evolution of event-related desynchronization in acute stroke: a pilot study.
Clin Neurophysiol
; 125(6): 1112-20, 2014 Jun.
Article
em En
| MEDLINE
| ID: mdl-24290502
ABSTRACT
OBJECTIVE:
Assessment of event-related desynchronization (ERD) may assist in predicting recovery from stroke and rehabilitation, for instance in BCI applications. Here, we explore the temporal evolution of ERD during stroke recovery.METHODS:
Ten stroke patients and eleven healthy controls were recruited to participate in a hand movement task while EEG was being recorded. Four measurements were conducted in eight patients within four months. We quantified changes of ERD using a modulation strength measure, S(m), which represents an area and amplitude of ERD.RESULTS:
7/8 patients showed good recovery. Absence-or-reduction of ipsilesional modulation was initially found in stroke patients but not in the healthy controls. In the patient group, two evolutions were found in 6/8 patients a significant increase in ipsilesional S(m); and a decreasing trend in contralesional S(m). In the only non-recovery patient, absence of ipsilesional modulation was observed, while his contralesional S(m) increased with time after stroke.CONCLUSION:
The two evolutions presumably reflect the reorganization of brain networks and functional recovery after acute stroke. The significant increase of ipsilesional S(m) in patients with a good recovery suggests an important role of this hemisphere during recovery.SIGNIFICANCE:
Improved understanding of ERD in acute stroke may assist in prognostication and rehabilitation.Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Recuperação de Função Fisiológica
/
Acidente Vascular Cerebral
/
Sincronização de Fases em Eletroencefalografia
/
Reabilitação do Acidente Vascular Cerebral
/
Córtex Motor
Idioma:
En
Ano de publicação:
2014
Tipo de documento:
Article