Abstract
Early diagnosis is important for the treatment of dementia, but people with dementia are often reluctant to see a doctor. In our laboratory, we are developing an inexpensive and easy screening tool for cognitive function using the P300-based Spelling Brain- Computer Interface (Spelling-BCI). By creating an attention-focused plot using discrimination scores and comparing the results, we hope to confirm the differences among patients with dementia and the value of screening for dementia. BCI estimates characters using discrimination scores calculated based on the P300 component for rows and columns. Therefore, we developed an attention-focused plot based on the score for each character. As a result, NC was displayed whiter and blacker as it became MCI/AD. NC was estimated to be 83.3%, MCI was estimated to be 63.0%, and AD was estimated to be 33.3% of the total number of characters. In addition, there was a tendency for AD to respond in addition to the rows and columns containing the target character. These results are thought to be due to a decrease in attention concentration caused by a decrease in cognitive function. Therefore, it was suggested that the difference among patients with dementia could be confirmed from the attention concentration plot, which is useful for dementia screening.
