Local spatial correlation analysis of hand flexion/extension using intraoperative high-density ECoG.
Annu Int Conf IEEE Eng Med Biol Soc
; 2015: 6190-3, 2015.
Article
em En
| MEDLINE
| ID: mdl-26737706
ABSTRACT
We recorded motor cortical activity using highdensity electrocorticogram (ECoG) from three patients during awake craniotomy. Subjects repeatedly executed hand flexion/extension tasks according to auditory instructions. Clear event-related desynchronization (ERD) in beta band (8-32) Hz and event-related synchronization (ERS) in gamma band (60-200) Hz were observed. High frequency band (HFB 60-200 Hz) activation was found to be more localized compared to low frequency band (LFB 8-32 Hz) activation in all subjects. Local spatial correlation maps in LFB and HFB were constructed by computing the correlation between channels. Local spatial correlation dropped more in the ERD/ERS areas consistently in two subjects. The results indicate that ERD/ERS patterns are more spatially uncorrelated and denser ECoG electrode is necessary within these areas to map uncorrelated `sources'. High resolution electrodes might improve both clinical functional mapping and brain machine interface outcomes in the near future.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Processamento de Sinais Assistido por Computador
/
Mapeamento Encefálico
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Eletroencefalografia
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Interfaces Cérebro-Computador
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Mãos
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Movimento
Limite:
Adult
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Female
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Humans
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Male
Idioma:
En
Ano de publicação:
2015
Tipo de documento:
Article