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Neuronal power attenuation or enhancement in specific frequency bands over the sensorimotor cortex, called Event-Related Desynchronization (ERD) or Event-Related Synchronization (ERS), respectively, is a major phenomenon in brain activities involved in imaginary movement of body parts. However, it is known that the nature of motor imagery-related electroencephalogram (EEG) signals is non-stationary...
Recognizing Event-Related Desynchronization or Synchronization (ERD/ERS) patterns generated by motor imagery tasks is an important process in Brain-computer interfaces (BCI). One of the most well-known algorithms to extract the discriminative patterns is Common Spatial Patterns (CSP). It finds an optimal spatial filter considering the spatial distribution of the ERD/ERS patterns. The CSP algorithm,...
Neuronal power attenuation or enhancement in the specific frequency bands over the sensorimotor cortex, called Event-Related Desynchronization (ERD) or Event-Related Synchronization (ERS), is one of the major phenomena in brain signals evoked by imagination of body parts movement. So many research groups have devoted their efforts to extract discriminative features by utilizing these phenomena and...
We propose a hierarchical stimulus presentation paradigm for a P300-based Hangul (Korean script) input system. A P300-based input system is one of the most promising noninvasive brain-computer interface (BCI) applications based on its direct applicability in many computer programs. While the previous row/column stimulus presentation paradigm has been well-suited to the English input, it may not be...
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