Title :
Cortical Imaging of Event-Related (de)Synchronization During Online Control of Brain-Computer Interface Using Minimum-Norm Estimates in Frequency Domain
Author :
Yuan, Han ; Doud, Alexander ; Gururajan, Arvind ; He, Bin
Author_Institution :
Dept. of Biomed. Eng., Minnesota Univ., Minneapolis, MN
Abstract :
It is of wide interest to study the brain activity that correlates to the control of brain-computer interface (BCI). In the present study, we have developed an approach to image the cortical rhythmic modulation associated with motor imagery using minimum-norm estimates in the frequency domain (MNEFD). The distribution of cortical sources of mu activity during online control of BCI was obtained with the MNEFD. Contralateral decrease (event-related desynchronization) and ipsilateral increase (event-related synchronization) are localized in the sensorimotor cortex during online control of BCI in a group of human subjects. Statistical source analysis revealed that maximum correlation with movement imagination is localized in sensorimotor cortex.
Keywords :
brain; electroencephalography; handicapped aids; neurophysiology; synchronisation; brain activity; brain-computer interface; cortical imaging; cortical rhythmic modulation; event-related desynchronization; event-related synchronization; minimum-norm estimates in the frequency domain; motor imagery; movement imagination; mu activity; sensorimotor cortex; statistical source analysis; Brain–computer interface (BCI); electroencephalogram (EEG); event-related desynchronization (ERD); event-related synchronization (ERS); motor imagery; source analysis; Algorithms; Brain Mapping; Electroencephalography; Evoked Potentials, Motor; Humans; Imagination; Male; Motor Cortex; Movement; Reproducibility of Results; Sensitivity and Specificity; User-Computer Interface; Young Adult;
Journal_Title :
Neural Systems and Rehabilitation Engineering, IEEE Transactions on
DOI :
10.1109/TNSRE.2008.2003384
