Fujikawa Ibuki, Fujikawa Joji, Fujiwara Masayuki, Takagi Yasushi, Morigaki Ryoma
Department of Advanced Brain Research, Graduate School of Biomedical Sciences, Tokushima University, 3-18-15 Kuramoto-Cho, Tokushima, Tokushima, 770-8503, Japan.
Student Lab, Faculty of Medicine, Tokushima University, 3-18-15 Kuramoto-Cho, Tokushima, Tokushima, 770-8503, Japan.
Exp Brain Res. 2025 May 29;243(7):158. doi: 10.1007/s00221-025-07097-6.
Binaural beat (BB) is a sound stimulus that produces an auditory phenomenon due to the difference in sounds of slightly different frequencies of two tones. In the present study, we aimed to examine the effects of 40 Hz BB on attention using a 40 Hz BB, with a baseline frequency set in the inaudible range, in order to eliminate any influence of the baseline sound, which may have been ignored in previous studies on BB that used the audible range. The experiment included electroencephalograph (EEG) analysis with a 16-channel EEG and assessment of attention with attention network test (ANT). The results revealed no significant difference in the correct response rates between EEG and ANT; however, the reaction time (RT) of ANT was significantly lower in the BB sessions than in the non-BB sessions. The correlation between power spectrum density and the mean RT of correct answers in ANT showed a significant difference only for the left dorsolateral prefrontal cortex in the theta band.
双耳节拍（BB）是一种声音刺激，由于两个音调频率略有不同的声音之间的差异而产生一种听觉现象。在本研究中，我们旨在使用40Hz的BB来研究40Hz BB对注意力的影响，其基线频率设置在听不见的范围内，以消除基线声音的任何影响，而在之前使用可听范围的BB研究中，基线声音的影响可能被忽略了。该实验包括使用16通道脑电图进行脑电图（EEG）分析以及使用注意力网络测试（ANT）评估注意力。结果显示，EEG和ANT之间的正确反应率没有显著差异；然而，ANT的反应时间（RT）在BB sessions中显著低于非BB sessions。功率谱密度与ANT中正确答案的平均RT之间的相关性仅在θ波段的左侧背外侧前额叶皮层显示出显著差异。
