脳波と光トポグラフィの同時計測に基づく光トポグラフィを用いたアルファブロッキング診断の検討

摘要

For near infrared red spectroscopy (NIRS), the debate over the reliability of its absolute value is ongoing, and discussed in this paper with alpha-blocking task. The purpose of the study is step by step clarification on NIRS reliability. The method in this paper is the evaluation with a task that is clinically important and has achieved a wide consensus and a diagnostics of its measurement. From this viewpoint, this paper discussed the NIRS measurement, with the electroencephalography (EEG) measurement of alpha-blocking as the task. Based on the EEG measurement results of alpha-blocking, we investigated the characteristic changes in the NIRS measurements; a correlation between the two measurements was found (0.806), based on alpha-rhythm patterns of EEG and the increasing or decreasing patterns of oxygen metabolism on NIRS. In addition, a correlation was found between complexities in the two measurements (0.677). The variation level of the complexity in the EEG measurements was 7.14 times larger compared with that of NIRS on average which suggests that the EEG measurements included much information than the NIRS measurements for alpha-blocking task. Despite, the correlation results suggest a possibility of NIRS application to alpha-blocking diagnosis. These numericals contribute to step by step clarification on NIRS reliability.