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Electroencephalograph (EEG) recordings during right and left hand motor imagery can be used to move a cursor to a target on a computer screen. Such an EEG-based brain-computer interface (BCI) can provide a new communication channel to replace an impaired motor function. Recently, we have proposed the detection method of Error Potential in order to add the fail safe function to BCI system. In this...
ERS and ERD (event-related synchronization and desynchronization) are observed in EEG (electroencephalogram) signals around such events as sensitive stimulus, motions, cognitive actions etc. Usually, ERS/ERD features of EEG are extracted as variances of band-passed signals of several trials. To make use of these features to recognize inputs for BCI (brain-computer interface), we applied discrete wavelet...
Electroencephalograph (EEG) recordings during right and left hand motor imagery can be used to move a cursor to a target on a computer screen. Such an EEG-based brain-computer interface (BCI) can provide a new communication channel to replace an impaired motor function. It can be used by e.g., handicap users with amyotrophic lateral sclerosis (ALS). In this paper, feature extraction based on morphological...
We have developed so far an automatic discrimination system of human sleep EEG stages based on a waveshape recognition method. These systems were able to detect discrete stages (stage MT, W, 1, 2, 3, 4, REM). However, they are not sufficient to extract much information in detail. Therefore, in order to extract more precise information for sleep stages, we have tried to analyze the sleep EEG in its...
Electroencephalograph (EEG) recordings during right and left hand motor imagery can be used to move a cursor to a target on a computer screen. Such an EEG-based brain-computer interface (BCI) can provide a new communication channel to replace an impaired motor function. It can be used by e.g., handicap users with amyotrophic lateral sclerosis (ALS). The conventional method purposes the recognition...
The goal of the present study is to compare human and channelized Hotellling (CH) observers in an ROC study to detect the perfusion that is characteristic of mild Alzheimer's disease within SPECT images. The studies involved three types of images: SPECT images, 3DSSP images, and the Z-score of 3DSSP images. Results show that the performance of the CH observer was similar to that of the human observers,...
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