Influence of attention alternation on movement-related cortical potentials in healthy individuals and stroke patients.
Clin Neurophysiol
; 128(1): 165-175, 2017 Jan.
Article
em En
| MEDLINE
| ID: mdl-27912170
ABSTRACT
OBJECTIVE:
In this study, we analyzed the influence of artificially imposed attention variations using the auditory oddball paradigm on the cortical activity associated to motor preparation/execution.METHODS:
EEG signals from Cz and its surrounding channels were recorded during three sets of ankle dorsiflexion movements. Each set was interspersed with either a complex or a simple auditory oddball task for healthy participants and a complex auditory oddball task for stroke patients.RESULTS:
The amplitude of the movement-related cortical potentials (MRCPs) decreased with the complex oddball paradigm, while MRCP variability increased. Both oddball paradigms increased the detection latency significantly (p<0.05) and the complex paradigm decreased the true positive rate (TPR) (p=0.04). In patients, the negativity of the MRCP decreased while pre-phase variability increased, and the detection latency and accuracy deteriorated with attention diversion.CONCLUSION:
Attention diversion has a significant influence on MRCP features and detection parameters, although these changes were counteracted by the application of the laplacian method.SIGNIFICANCE:
Brain-computer interfaces for neuromodulation that use the MRCP as the control signal are robust to changes in attention. However, attention must be monitored since it plays a key role in plasticity induction. Here we demonstrate that this can be achieved using the single channel Cz.Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Atenção
/
Potencial Evocado Motor
/
Acidente Vascular Cerebral
/
Interfaces Cérebro-Computador
/
Córtex Motor
/
Movimento
Idioma:
En
Ano de publicação:
2017
Tipo de documento:
Article