white paper

Brain Photobiomodulation Improves Sleep Quality in Subjective Cognitive Decline: A Randomized, Sham-Controlled Study

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Abstract

Background: Sleep appears to be a sensitive biomarker that facilitates early detection and effective intervention for Alzheimer’s disease, while subjective cognitive decline (SCD) is a risk factor for Alzheimer’s disease. Prefrontal cortex atrophy is associated with both sleep disruption and cognitive decline. Transcranial brain photobiomodulation (PBM) therapy can enhance frontal cortex oxygen consumption, increasing frontal cortex mediated memory function.

Objective: This study aimed to test whether PBM therapy targeting the frontal cortex could improve sleep and cognitive function in SCD.

Methods: Fifty-eight SCDs were divided into the PBM group (N = 32) in which real light therapy was administered and a sham light therapy group (N = 26). All the participants received either real light or sham light therapy for 6 days consecutively, while the sleep data were recorded. The n-back task was employed to measure each participant’s working memory.

Results: We found no differences in sleep efficiency change (F = 211, p = 0.279), REM stage percent change (F = 420, p = 0.91), and wake-up time (F = 212, p = 0.277) between the two groups. The sleep efficiency and REM were improved within the true light group on the fifth day. The true light group perform better than the control group in the n-back test, the accuracy was higher in the 2-back test (88.6% versus 79.6%, p = 0.001), and the reaction time in 1-back was shorter (544.80±202.00 versus 592.87±222.05, p = 0.003).

Conclusion: After five days of PBM therapy targeting the prefrontal cortex, sleep efficiency and N-back cognitive performance were improved on the fifth day.

Read more on nih.gov or download the PDF»

 

white paper

Lights at night: does photobiomodulation improve sleep?

/in /by

Abstract

Sleep is a critical part of our daily routine. It impacts every organ and system of our body, from the brain to the heart and from cellular metabolism to immune function. A consistent daily schedule of quality of sleep makes a world of difference to our health and well-being. Despite its importance, so many individuals have trouble sleeping well. Poor quality sleep has such a detrimental impact on many aspects of our lives; it affects our thinking, learning, memory, and movements. Further, and most poignantly, poor quality sleep over time increases the risk of developing a serious medical condition, including neurodegenerative disease. In this review, we focus on a potentially new non-pharmacological treatment that improves the quality of sleep. This treatment, called photobiomodulation, involves the application of very specific wavelengths of light to body tissues. In animal models, these wavelengths, when applied at night, have been reported to stimulate the removal of fluid and toxic waste-products from the brain; that is, they improve the brain’s inbuilt house-keeping function. We suggest that transcranial nocturnal photobiomodulation, by improving brain function at night, will help improve the health and well-being of many individuals, by enhancing the quality of their sleep.

Read more on nih.gov or download the PDF»

 

white paper

Photobiomodulation and Its Therapeutic Potential in Sleep Disturbances

/in /by

Abstract

Photobiomodulation (PBM) is a non-invasive therapeutic technique employing specific wavelengths of red and near-infrared light to induce photochemical reactions in biological tissues without generating significant heat. PBM operates at low power densities, primarily acting through mitochondrial chromophores like cytochrome c oxidase to enhance cellular metabolism, energy production, and repair mechanisms. Based upon this foundational understanding, a critical evaluation was conducted to assess its impact on sleep-wake regulation. Current scientific evidence from both preclinical and clinical research suggests that PBM has the potential to influence sleep architecture, duration, and quality through complex interactions with cellular metabolic pathways and neurophysiological mechanisms governing the sleep-wake cycle. Despite growing scientific interest, significant research gaps persist; elucidating the precise cellular and molecular mechanisms by which PBM affects sleep physiology remains a primary challenge. There is an urgent need to standardize intervention protocols, including determining optimal wavelengths, dosage parameters, treatment durations, and delivery methods, to ensure consistent and reproducible results. Future research should focus on identifying predictive biomarkers for personalized treatment, examining transcranial PBM’s effects on neural pathways involved in sleep regulation, and assessing long-term safety to address potential cumulative effects. In conclusion, while PBM shows promise as a non-invasive therapeutic approach for sleep regulation, rigorous research is needed to establish its clinical efficacy and understand its molecular mechanisms, ultimately advancing it from an experimental therapy to a standardized treatment for sleep disorders.

Read more on leepmedres.org or download the PDF»

 

white paper

Brain Waste Removal System and Sleep: Photobiomodulation as an Innovative Strategy for Night Therapy of Brain Diseases

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Abstract

Emerging evidence suggests that an important function of the sleeping brain is the removal of wastes and toxins from the central nervous system (CNS) due to the activation of the brain waste removal system (BWRS). The meningeal lymphatic vessels (MLVs) are an important part of the BWRS. A decrease in MLV function is associated with Alzheimer’s and Parkinson’s diseases, intracranial hemorrhages, brain tumors and trauma. Since the BWRS is activated during sleep, a new idea is now being actively discussed in the scientific community: night stimulation of the BWRS might be an innovative and promising strategy for neurorehabilitation medicine. This review highlights new trends in photobiomodulation of the BWRS/MLVs during deep sleep as a breakthrough technology for the effective removal of wastes and unnecessary compounds from the brain in order to increase the neuroprotection of the CNS as well as to prevent or delay various brain diseases.

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white paper

Photobiomodulation Sleep Therapy: Transcranial Red Light Effects on Deep Sleep Architecture

/in /by

Abstract

Reclaiming Rest: The Promise of Transcranial Red Light Therapy

Sleep is a fundamental biological function, essential for physical health, cognitive performance, and emotional well-being. Despite its importance, millions of individuals globally struggle with attaining high-quality sleep, often experiencing issues such as insomnia, fragmented sleep, or difficulty reaching deep sleep stages. The limitations of traditional pharmacological treatments, such as dependency and side effects, have driven interest in non-drug approaches to enhance sleep quality. Among emerging innovations, photobiomodulation (PBM) therapy—especially transcranial red and near-infrared light therapy—has garnered significant scientific attention for its neurophysiological benefits, particularly in optimizing sleep architecture.

Read more on medoze.com or download the PDF»

 

white paper

Lights at night: does photobiomodulation improve sleep?

/in /by

Abstract

Sleep is a critical part of our daily routine. It impacts every organ and system of our body, from the brain to the heart and from cellular metabolism to immune function. A consistent daily schedule of quality of sleep makes a world of difference to our health and well-being. Despite its importance, so many individuals have trouble sleeping well. Poor quality sleep has such a detrimental impact on many aspects of our lives; it affects our thinking, learning, memory, and movements. Further, and most poignantly, poor quality sleep over time increases the risk of developing a serious medical condition, including neurodegenerative disease. In this review, we focus on a potentially new non-pharmacological treatment that improves the quality of sleep. This treatment, called photobiomodulation, involves the application of very specific wavelengths of light to body tissues. In animal models, these wavelengths, when applied at night, have been reported to stimulate the removal of fluid and toxic waste-products from the brain; that is, they improve the brain’s inbuilt house-keeping function. We suggest that transcranial nocturnal photobiomodulation, by improving brain function at night, will help improve the health and well-being of many individuals, by enhancing the quality of their sleep.

Read more on lww.com or download the PDF»

 

white paper

Photobiomodulation and Its Therapeutic Potential in Sleep Disturbances

/in /by

Abstract

Photobiomodulation (PBM) is a non-invasive therapeutic technique employing specific wavelengths of red and near-infrared light to induce photochemical reactions in biological tissues without generating significant heat. PBM operates at low power densities, primarily acting through mitochondrial chromophores like cytochrome c oxidase to enhance cellular metabolism, energy production, and repair mechanisms. Based upon this foundational understanding, a critical evaluation was conducted to assess its impact on sleep-wake regulation. Current scientific evidence from both preclinical and clinical research suggests that PBM has the potential to influence sleep architecture, duration, and quality through complex interactions with cellular metabolic pathways and neurophysiological mechanisms governing the sleep-wake cycle…

Read more on pbmfoundation.org or download the PDF»

 

white paper

The effect of photobiomodulation on the brain during wakefulness and sleep

/in /by

Abstract

Over the last seventy years or so, many previous studies have shown that photobiomodulation, the use of red to near infrared light on body tissues, can improve central and peripheral neuronal function and survival in both health and in disease. These improvements are thought to arise principally from an impact of photobiomodulation on mitochondrial and non-mitochondrial mechanisms in a range of different cell types, including neurones. This impact has downstream effects on many stimulatory and protective genes. An often-neglected feature of nearly all of these improvements is that they have been induced during the state of wakefulness. Recent studies have shown that when applied during the state of sleep, photobiomodulation can also be of benefit, but in a different way, by improving the flow of cerebrospinal fluid and the clearance of toxic waste-products from the brain. In this review, we consider the potential differential effects of photobiomodulation dependent on the state of arousal. We speculate that the effects of photobiomodulation is on different cells and systems depending on whether it is applied during wakefulness or sleep, that it may follow a circadian rhythm. We speculate further that the arousal-dependent photobiomodulation effects are mediated principally through a biophoton – ultra-weak light emission – network of communication and repair across the brain.

Read more on pbmfoundation.org or download the PDF»