Through joint research with Suzuki Co., Ltd. and Jobu University, the Miyazaki Makoto Laboratory of the Faculty of Informatics, Shizuoka University has clarified the process of brain activity when receiving strong light and feeling "dazzling" by electroencephalogram measurement.It is expected to be a basic finding for evaluating glare based on physiological grounds.
When driving a car at night, the high beam of an oncoming vehicle often makes you feel dazzling.The visual experience created by such a strong light stimulus is called "glare".Glare can cause traffic accidents with poor visibility and discomfort.An engineering evaluation method has been proposed as a countermeasure against glare, but in the conventional method, only the physical factor of light stimulation is used, and the neural activity of the brain that produces the subjective experience of glare is not considered at all.
Therefore, the research group investigated the part of the brain that is active when humans are feeling glare and the time zone by measuring brain waves.As a result, glare-related neural responses were observed in the right temporal temporal region (about 100 ms after the start of light stimulation presentation), the left temporal temporal region (130-300 ms later), and the anterior frontal region (same). Observed after 180-190 ms).
Increased brain activity observed in the right and left occipital temporal regions reflects neural responses related to light intensity and brilliant texture, and increased brain activity observed in the anterior frontal region is discomfort associated with glare. It seems that it reflects the neural response related to.
Now that the head region and time zone related to glare have been identified, it will be possible to take measures against glare, including individual differences that cannot be measured by physical factors alone.This will lead to the creation of a comfortable and safe driving environment that matches the various characteristics of each individual, and is also expected to be applied to the design of lighting and visual information presentation in cities, houses, home appliances, etc.
Paper information:[Proceedings of the Society of Automotive Engineers of Japan, Vol. 52, No. 5] Neurophysiological response associated with subjective glare-Study by event-related potential-