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Effect of Near-Infrared Pulsed Light on the Human Brain Using Electroencephalography
Evidence-based Complementary and Alternative Medicine ( IF 2.650 ) Pub Date : 2021-03-05 , DOI: 10.1155/2021/6693916
Yi-Chia Shan, Wei Fang, Yang-Chyuan Chang, Wen-Dien Chang, Jih-Huah Wu

In our previous study, the low-level laser (LLL) stimulation at the palm with a stimulation frequency of 10 Hz was able to induce significant brain activation in normal subjects. The electroencephalography (EEG) changes caused by the stimulation of light-emitting diode (LED) in normal subjects have not been investigated. This study aimed at identifying the effects of LED stimulation on the human brain using EEG analysis. Moreover, the dosage has been raised 4 times than that in the previous LLL study. The LED array stimulator (6 pcs LEDs, central wavelength 850 nm, output power 30 mW, and operating frequency 10 Hz) was used as the stimulation source. The LED stimulation was found to induce significant variation in alpha activity in the occipital, parietal, and temporal regions of the brain. Compared to the previous low-level laser study, LED has similar effects on EEG in alpha (8–12 Hz) activity. Theta (4–7 Hz) power significantly increased in the posterior head region of the brain. The effect lasted for at least 15 minutes after stimulation ceased. Conversely, beta (13–35 Hz) intensity in the right parietal area increased significantly, and a biphasic dose response has been observed in this study.

中文翻译:

脑电图近红外脉冲光对人脑的影响

在我们先前的研究中,手掌以10 Hz的刺激频率进行的低水平激光(LLL)刺激能够在正常受试者中诱导明显的大脑激活。尚未研究在正常受试者中由发光二极管(LED)刺激引起的脑电图(EEG)变化。这项研究旨在使用EEG分析确定LED刺激对人脑的影响。此外,该剂量已比以前的LLL研究提高了4倍。LED阵列刺激器(6个LED,中心波长850 nm,输出功率30 mW,工作频率10 Hz)用作刺激源。发现LED刺激会在大脑的枕骨,顶叶和颞部区域引起α活性的显着变化。与之前的低水平激光研究相比,LED在α(8–12 Hz)活动中对脑电图具有类似的影响。脑后头部区域的θ(4–7 Hz)功率显着增加。停止刺激后,效果持续至少15分钟。相反,右侧壁区的β(13–35 Hz)强度显着增加,并且在此研究中观察到双相剂量反应。
更新日期:2021-03-05
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