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Computational Intelligence and Neuroscience
Volume 2009, Article ID 164958, 12 pages
Research Article

Measurement of Brain Function of Car Driver Using Functional Near-Infrared Spectroscopy (fNIRS)

1Department of Mechanical Engineering, College of Industrial Technology, Nihon University, 1-2-1 Izumi-cho, Narashino-shi, Chiba 275-8575, Japan
2Department of Mechanical Engineering, Graduate school of Nihon University, 1-2-1 Izumi-cho, Narashino-shi, Chiba 275-8575, Japan

Received 3 November 2008; Revised 5 March 2009; Accepted 2 April 2009

Academic Editor: Laura Astolfi

Copyright © 2009 Hitoshi Tsunashima and Kazuki Yanagisawa. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The aim of this study is to propose a method for analyzing measured signal obtained from functional Near-Infrared Spectroscopy (fNIRS), which is applicable for neuroimaging studies for car drivers. We developed a signal processing method by multiresolution analysis (MRA) based on discrete wavelet transform. Statistical group analysis using Z-score is conducted after the extraction of task-related signal using MRA. Brain activities of subjects with different level of mental calculation are measured by fNIRS and fMRI. Results of mental calculation with nine subjects by using fNIRS and fMRI showed that the proposed methods were effective for the evaluation of brain activities due to the task. Finally, the proposed method is applied for evaluating brain function of car driver with and without adaptive cruise control (ACC) system for demonstrating the effectiveness of the proposed method. The results showed that frontal lobe was less active when the subject drove with ACC.