title: Modulation of ERD/S by having a conscious target during lower-extremity motor imagery.
abstract: In the field of neurorehabilitation with brain-computer interfaces (BCIs) technology, an EEG feature, event-related desynchronization/synchronization (ERD/S) caused by motor imagery (MI) is widely used for estimating human motor intention. However, sufficient neurofeedback training is required for the use of the MI-based BCI system, because the ability to generate ERD/S is highly dependent on individuals. To find an effective MI condition for the BCI system, we hypothesize that having a conscious target during MI would enhance the extent of ERD/S. In the experiments, we investigated the individual effect of two types of MIs: leg extension (L) and leg extension with a conscious target (i.e., kicking a ball (KB)) on the resultant ERD/S. We evaluated time-frequency maps of ERD/S and statistically compared these two conditions (i.e., L and KB). As a result, a significant difference was found in beta-ERD (paired t-test, p <; 0.01), while there were no significant differences in mu-ERD and beta-ERS. These results suggest that having a conscious target during lower extremity MI would strengthen the ERD in beta frequency band compared to the case without target.
authors.forename: Kosuke
authors.initials: K
authors.lastname: Kitahara
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Kondo
mesh_terms: D000328:Adult; D062207:Brain-Computer Interfaces; D003243:Consciousness; D004569:Electroencephalography; D005260:Female; D006801:Humans; D019018:Imagery, Psychotherapy / Q000379:methods*; D033182:Intention; D035002:Lower Extremity; D008297:Male; D009043:Motor Activity; D055815:Young Adult