Effect of Low-Level Laser Stimulation on EEG

Wu, Jih‐Huah; Chang, Wen‐Dien; Hsieh, Chang‐Wei; Jiang, Joe‐Air; Fang, Wei; Shan, Yi-Chia; Chang, Yang-Chyuan

doi:10.1155/2012/951272

Cited by 21 publications

(36 citation statements)

References 33 publications

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“…Changes in the power of cortical rhythms can be influenced by the psychologic state, e.g., meditation can enhance the process of habituation to background stimuli (also acoustic, with no task imposed), and depression can reduce perception accuracy (13,14). Furthermore, we do not know what happens to cortical activity after the cessation of acoustic stimulation, e.g., EEG changes after conventional laser stimulation last for 15 minutes (15). To further investigate the usefulness of sound therapy for tinnitus, studies should be undertaken to observe neural activity on EEG and positron emission tomography simultaneously.…”

Section: Discussionmentioning

confidence: 99%

Cortical activity in tinnitus patients and its modification by phonostimulation

Pawlak-OsiÅska¹,

KaÅomierczak²,

KaÅomierczak³

et al. 2013

Clinics

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OBJECTIVE:The goal of this study was to observe spontaneous cortical activity and cortical activity modulated by tinnitus-matched sound in tinnitus patients and healthy subjects with no otoneurologic symptoms.METHOD:Data were prospectively collected from 50 tinnitus patients and 25 healthy subjects. Cortical activity was recorded in all subjects with eyes closed and open and during photostimulation, hyperventilation and acoustic stimulation using 19-channel quantitative electroencephalography. The sound applied in the tinnitus patients was individually matched with the ability to mask or equal the tinnitus. The maximal and mean amplitude of the delta, theta, alpha and beta waves and the type and amount of the pathologic EEG patterns were noted during each recording. Differences in cortical localization and the influence of sound stimuli on spontaneous cortical activity were evaluated between the groups.RESULTS:The tinnitus group exhibited decreased delta activity and increased alpha and beta activity. Hyperventilation increased the intensity of the differences. The tinnitus patients had more sharp-slow waves and increased slow wave amplitude. Sound stimuli modified the EEG recordings; the delta and beta wave amplitudes were increased, whereas the alpha-1 wave amplitude was decreased. Acoustic stimulation only slightly affected the temporal region.CONCLUSION:Cortical activity in the tinnitus patients clearly differed from that in healthy subjects, i.e., tinnitus is not a “phantom” sign. The changes in cortical activity included decreased delta wave amplitudes, increased alpha-1, beta-1 and beta-h wave amplitudes and pathologic patterns. Cortical activity modifications occurred predominantly in the temporal region. Acoustic stimulation affected spontaneous cortical activity only in tinnitus patients, and although the applied sound was individually matched, the pathologic changes were only slightly improved.

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Section: Discussionmentioning

confidence: 99%

Cortical activity in tinnitus patients and its modification by phonostimulation

Pawlak-OsiÅska¹,

KaÅomierczak²,

KaÅomierczak³

et al. 2013

Clinics

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“…Their brain waves changed. In particular, the α band increased in some regions, as shown in the lower right corner, and the β band decreased for normal subjects in the open eyes condition [7]. In this study, the conduction pathway was complicated, including nerve and meridian conduction.…”

Section: Methodsmentioning

confidence: 61%

Photobiomodulation Therapy (PBMT) as a Complementary Medicine for Women to Adjust Their Autonomic Nervous Systems and Induce Specific Brain Waves - A Case Report

Wu¹

2019

obm icm

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Sleep has played a critical role in maintaining the physical and psychological health of humans, especially for women. Many studies reveal that sleep disturbance can cause more inflammation, coagulation, insulin resistance, and psychosocial distress in women than in men. A lot of medications are used to treat sleep disorders, but they can cause various adverse effects. Photobiomodulation therapy (PBMT) has been proved as a safe and easy-touse therapy. We propose two methods of affecting the autonomic nervous system and brain waves, with single laser acupuncture and array laser stimulation, respectively. These two methods were applied to a woman who suffered from sleep problems and being overworked. New applications for these two methods are also proposed in this article.

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“…LLL can induce the biophysical changes in many published papers. From our previous study, using LLL to radiate the left palm and observed with EEG, alpha (8-13Hz) activity increase in occipital, parietal, and temporal lobes, it showed the brain wave is influenced by LLL [7][8]. In this research, we use LED to replace LLL to radiate the palm and observe the brain wave change with EEG.…”

Section: Introductionmentioning

confidence: 88%

Effect of Infrared LED Array Stimulation on EEG

Fang

Shan

et al. 2013

Biomedical Engineering

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Affecting the brainwave by radiating the palm of the tester with a low-level laser array has been proposed in our previous study. The power of alpha rhythms has been increased mainly in the posterior head regions. The effect lasted at least 15 minutes after cessation of the laser stimulation. However, the effect of non-coherent light (Light Emitting Diode, LED) in similar conditions hasn't been investigated. In this study, a LED array stimulator (6 pcs LEDs, central wavelength 850nm, output power 30mW, operation frequency: 10 Hz) was designed to be the light source. An eyes-open EEG data were recorded during and after stimulation. The experimental results reveal the power of the alpha band has been enhanced with this LED array which operated in 10Hz. Significant activations were found in the parietal lobe 、 the occipital lobe and the temporal lobe (p<0.05). The experimental result reveals that LED almost has the same effect obtained from the laser.

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Effect of Low-Level Laser Stimulation on EEG

Cited by 21 publications

References 33 publications

Cortical activity in tinnitus patients and its modification by phonostimulation

Cortical activity in tinnitus patients and its modification by phonostimulation

Photobiomodulation Therapy (PBMT) as a Complementary Medicine for Women to Adjust Their Autonomic Nervous Systems and Induce Specific Brain Waves - A Case Report

Effect of Infrared LED Array Stimulation on EEG

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