Light Dose Database

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This is the EMF Channel database of light therapy study doses. After getting the results, click to view more study details. Only successful studies are included. 99% of the studies here are on humans, not animals. This database is a work in progress. Many thanks to Vlad for his PBM database. When the data here references his work, the detail page includes a link to the PBM spreadsheet.

Red light therapy brain dose

Infrared Sinus Delivery the Most Efficient Choice to Stimulate the Brain

Journal:

Red and NIR light dosimetry in the human deep brain

Wavelength:
808, 671
Irradiance:
1
Condition:
Cognition, Dementia/Alzheimers, Parkinson's
Outcome:

Researchers tested 671 nm and 808 nm 1 mW/cm^2 laser photon delivery in a severed cadaver head. They compared sinus (transsphenoidal), oral, and head (transcranial) light delivery at both wavelengths. 808 delivered more energy than 671 to a 40 mm target inside the brain tissue. They found that sinus delivery delivered 20 times more photons than transcranial delivery. Comparing oral, sinus and head delivery, and comparing 671 nm to 808 nm delivered at the same power density, the 808 nm diode transferred the largest quantity of photons to the farthest parts of the brain.

Red light therapy brain dose

Significant Gulf War Illness (Chronic Multisymptom Illness) Improvements after 12 Weeks of Vielight Neuro Alpha Treatment

Journal:

Improvements in Gulf War Illness Symptoms After Near-Infrared
Transcranial and Intranasal Photobiomodulation: Two Case
Reports

Wavelength:
810
Irradiance:
100, 75 and 25 mW/cm^2
Condition:
Anxiety, Cognition, Depression, Memory, Pain, Headache, PTSD
Outcome:

Researchers tested the effects of the Vielight Neuro Alpha photobiomodulation device on Gulf War Illness (GWI) symptoms. GWI symptoms include persistent headaches, cognitive difficulties, joint pain, musculoskeletal pain, fatigue, gastrointestinal problems. Because the pattern can present in non-Gulf War veterans, the phenomenon is also called Chronic Multisymptom Illness (CMI). A CMI diagnosis is 6 months of symptoms in at least two of these categories: fatigue, pain, and cognitive-mood. A Kansas GWI is moderately severe or multiple chronic symptoms in at least three of these categories: fatigue/sleep problems, pain, neurological/
cognitive/mood problems, respiratory problems, gastrointestinal problems, and skin problems.

Subjects took self-assessment questionnaires and cognitive tests. They tested before treatment and at the 12-week mark. Gulf War Veteran 1 (GWV1) presented as a Kansas GI. Gulf War Veteran 2 (GWV2) presented as Kansas GWI. Subjects used the Vielight Neuro Alpha device daily for 12 weeks. The device delivers:

  • 810 nm 100 mW/cm^2 pulsed at 10 Hz to 3 posterior transcranial targets
  • 810 nm 75 mW/cm^2 pulsed at 10 Hz to an anterior target
  • 810 nm 25 mW/cm^2 pulsed at 10 Hz to an intranasal passage

At 12 weeks both subjects improved on multiple scores. GWV1 no longer qualified as Kansas GWI. He was re-categorized as mild-moderate CMI. GWV1 showed improvements in mood-cognitive, pain, sleep and fatique categories.

GWV2 was re-categorized from severe CMI to mild-moderate CMI. He showed improvements in fatique, pain and mood-cognitive scores.

Red light therapy brain dose

Vielight Treatment Measurable Brain Improvements in N=1 Traumatic Brain Injury Patient

Journal:

Changes in Brain Function and Structure After Self-Administered Home Photobiomodulation Treatment in a Concussion Case

Wavelength:
810
Irradiance:
Condition:
Cognition, Traumatic Brain Injury
Outcome:

One 23-year old traumatic brain injury patient complained of headaches, anxiety, and difficulty concentrating. He home-treated with a Vielight Neuro Duo. At an 8 week measurement he had increased brain volume, improved functional connectivity, increased cerebral perfusion, and neuropsychological improvements.

Red light therapy brain dose

Parksinson’s Mobility, Balance and Cognition Improvements with Brain Photobiomodulation

Journal:

Improvements in clinical signs of Parkinson’s disease using photobiomodulation: A prospective proof-of-concept study

Wavelength:
810
Irradiance:
Condition:
Cognition, Parkinson's
Outcome:
  • Vielight Gamma 4 LEDs, 240 joules, four transcranial targets
  • Vielight Gamma 1 LED, 15 joules, one intranasal target
  • Irradia MID 2.5 4 Laser Diodes, 39.6 joules, or MIDCARE laser, 2 diodes, 39.6 joules, C1/C2 neck region and abdomen

 

Group 1 Schedule:

  • Weeks 1-4: 3x/week
  • Weeks 5-8: 2x/week
  • Weeks 9-12: 1x/week
  • Weeks 13-40: 3x/week

Group 2 Schedule:

  • Weeks 13-25: 3x/week

Groups were tested before and after PBM treatment on measures:

  • Functional Mobility task of Time Up and Go (TUG): Stand, walk 3 m, turn, return, sit down
  • Gait TUG Motor: First task plus carrying water
  • Gait TUG Cognitive: First task plus counting backwards in twos
  • Gait TUG 10 Meter Walk: Time to walk 14 meters after having already walked 2 meters
  • Gait TUG 10 Meter Stride: Number of strides to walk last 6 m of task above
  • Dynamic Balance Step Test: Number of times patient used a step for balance
  • Cognition Montreal Cognitive Assessment: Standardized cognition test
  • Fine Motor Skills Spiral Test: Drawing within the lines
  • Fine Motor Skills Nine Hole Peg: Put pegs in holes, return pegs to bin
  • Fine Motor Skills Micrographia: Handwriting area taken per word
  • Static Balance Tandem Stance: Duration of standing with one foot ahead of the other
  • Static Balance Single Leg Stance: Duration of standing with one foot in the air

 

Participants in both groups saw significant improvement in functional mobility, dynamic balance, and cognition. Results were good but not significant for fine motor skills and static balance.

Red light therapy brain dose

Improve Coma Patient Alertness after 785 nm Transcranial Laser Treatments

Journal:

Neuroplastic effects of transcranial near-infrared stimulation (tNIRS) on the motor cortex

Wavelength:
785
Irradiance:
10
Condition:
Cognition, Coma
Outcome:

16 comatose patients received 785 transcranial 785 nm infrared laser treatments five timers a week for four weeks. Post treatment measurement showed improved alertness, and improved awareness over time.

Red light therapy brain dose

Transcranial 850 nm Infrared Treatment of Vegatative Patient Yields Blood Flow and Neurological Improvement

Journal:

Focal increase in cerebral blood flow after treatment with near-infrared light to the forehead in a patient in a persistent vegetative state

Wavelength:
850
Irradiance:
11.4
Condition:
Cognition, Coma
Outcome:

A researcher treated a vegatative patient with 850 nm infrared LED 20.5 J/cm^2 for 30 min, 2 times per day, for 73 days. The transcranial treatment included 2 sites at the left and right of the forehead above the eyebrows. At measurement the patient had increased blood flow in the treated area and better neurological outcomes..

Red light therapy brain dose

Transcranial 1064 nm Infrared Treatment Improves Depression

Journal:

Transcranial Laser Stimulation as Neuroenhancement for Attention Bias Modification in Adults with Elevated Depression Symptoms

Wavelength:
1064
Irradiance:
250
Condition:
Cognition, Depression
Outcome:

51 patients with elevated depression symptoms received 1064 nm infrared transcranial laser treatments over two sessions. Researchers concluded that “right prefrontal irradiation improved attention bias modification intervention effects and depression symptoms.”

Red light therapy brain dose

Transcranial 808 nm High Dose Infrared Significantly Improves Major Depressive Disorder Rating Scores

Journal:

Near-Infrared Transcranial Radiation for Major Depressive Disorder: Proof of Concept Study

Wavelength:
808
Irradiance:
5000 and 700
Condition:
Cognition, Depression, Emotion
Outcome:

4 Major Depressive Disorder (MDD) patients received 808 nm infrared laser treatment at 84 J/cm^2 at 4 sites transcranially. At 6 weeks post irradiation they had healthier Hamilton Depression Rating Scale scores on 17 items.

Red light therapy brain dose

810 nm Infrared Transcranial LED Treatment Corresponds with Decreased Depression Scores

Journal:

Psychological benefits 2 and 4 weeks after a single treatment with near infrared light to the forehead: a pilot study of 10 patients with major depression and anxiety

Wavelength:
810
Irradiance:
250
Condition:
Cognition, Depression
Outcome:

Ten patients with Major Depressive Disorder (MDD) received 810 nm LED treatment transcranially at 60 J/cm^2. Researchers measured decreased depression and anxiety according to the Hamilton Depression Rating Scale. They did not find changes in cerebral blood flow.

Red light therapy brain dose

Vielight 810 and Neuro Intranasal and Transcranial Infrared LED Significantly Decreases Dementia Symptoms

Journal:

Significant Improvement in Cognition in Mild to Moderately Severe Dementia Cases Treated with Transcranial Plus Intranasal Photobiomodulation: Case Series Report

Wavelength:
810
Irradiance:
14.2 or 41+23
Condition:
Cognition, Dementia/Alzheimers
Outcome:

A 2017 study in Photomedicine and Laser Surgery found improved dementia symptoms after 810 nm infrared transcranial and intranasal irradiation of five patients using Vielight 810 and Neuro LED devices. Patients received 10.65 J/cm2 from 14.2 mW/cm^2 or 24.6+13.8 J/cm^2 from 41+23 mW/cm^2. Treatment times for 25 or 20 minutes. The devices output 10 Hz pulsed wave. The study lasted 12 weeks.  Vielight 810 is an intranasal device. The Neuro is transcranial and intranasal. Light reached “bilateral mesial prefrontal cortex, precuneus/posterior cingulate cortex, angular gyrus, and hippocampus.” Results included dementia improvement of sleep, fewer angry outburts, reduced anxiety and reduced wandering.

Red light therapy brain dose

Whole Head Infrared LED Treatment Significantly Improves Dementia Measurements

Journal:

Photobiomodulation with Near Infrared Light Helmet in a Pilot, Placebo Controlled Clinical Trial in Dementia Patients Testing Memory and Cognition

Wavelength:
1060, 1080
Irradiance:
Condition:
Cognition, Dementia/Alzheimers
Outcome:

11 dementia patients received 1060 nm to 1080 nm infrared pulsed at 10 Hz LED treatment for 6 minutes a day  for 28 days. They wore a brain helmet irradiating the brain from all directions. Researchers found improved executive functioning, recall, visual attention and  task switching, as well as improved EEG amplitude.

Red light therapy brain dose

Invasive Femoral Artery Laser Fiber Optic Irradiation Improves Alzheimer’s Symptoms

Journal:

Dementia and Cognitive Impairment Reduction after Laser Transcatheter Treatment of Alzheimer’s Disease

Wavelength:
Range
Irradiance:
20
Condition:
Cognition, Dementia/Alzheimers
Outcome:

89 Alzheimer’s patients received a range of wavelengths in the visible spectrum (25-1000 nm) for 20 to 40 minutes, with continuous or pulsed wave laser. Researchers inserted a fiber optic through a femoral artery catether to deliver light  to the cerebral arteries. Analysis showed improved microcirculation, cognitive recovery and decreased dementia.

Red light therapy brain dose

Stroke Improvement on N=1 Patient Receiving 660 nm Red and 850 nm Infrared Therapy

Journal:

A new treatment protocol using photobiomodulation and muscle/bone/joint recovery techniques having a dramatic effect on a stroke patient’s recovery: a new weapon for clinicians

Wavelength:
660, 850
Irradiance:
1400
Condition:
Cognition, Stroke
Outcome:

A stroke victim received 660 nm and 850 nm irradiation to 32 sites on the head, brainstem, spine and musculature from a 1400 mW device delivering 2.95 J/cm^2. Each site received treatment for 1 minute, 1 time per week for 8 weeks. The author found improvements in cognitive and physical deficits.

Red light therapy brain dose

Transcranial 808 nm Infrared Laser Treatment Improves Stroke Outcomes Not Repeatable

Journal:

Infrared laser therapy for ischemic stroke: a new treatment strategy: results of the NeuroThera Effectiveness and Safety Trial-1 (NEST-1)

Wavelength:
808
Irradiance:
10
Condition:
Cognition, Stroke
Outcome:

120 acute stroke patients received 808 nm transcranial laser within 24 hours of onset. Each received 1.2 J/cm^2 at the cortext for 2 minutes on 20 sites on a shaved scalp. Analysis found improvement based on the NIH Health Stroke Scale, modified.

Red light therapy brain dose

Severe Brain Damage Transcranial Laser Brings Improvement, Epileptic Fits

Journal:

Transcranial Low-Level Laser Therapy May Improve Alertness and Awareness in Traumatic Brain Injured Subjects with Severe Disorders of Consciousness: a Case Series

Wavelength:
785
Irradiance:
10
Condition:
Cognition, Traumatic Brain Injury
Outcome:

Five traumatic brain injury patients with cognitive disabilities received transcranial 785 nm infrared laser 5 times per week for 6 weeks. They showed improved awareness and alertness, but two epileptic fits corresponded with treatment earlier that day. The fits also corresponded with concurrent antibiotic treatments.

Red light therapy brain dose

Chronic TBI Infrared Laser Transcranial Treatment

Journal:

Treatments for traumatic brain injury with emphasis on transcranial near-infrared laser phototherapy

Wavelength:
810, 980
Irradiance:
10 and 15 WATTS
Condition:
Cognition, Depression, Emotion, PTSD
Outcome:

10 chronic TBI patients received 810 nm and 980 nm infrared laser treatment of 14.8 to 28.3 J/cm^2 2 to 3 times per week for 8 weeks. Treatments were pulsed at 10 Hz. Transcranial treatment spots included 2 sites on the forehead and 3 bilateral, prefrontal and temporal. At measurement they showed improved headaches, sleep disturbances, cognition, mood regulation,  anxiety and irritability.

Red light therapy brain dose

Chronic Traumatic Brain Injury, Depression, PTSD, Social Anxiety Transcranial LED Treatment

Journal:

Significant Improvements in Cognitive Performance Post-Transcranial, Red/Near-Infrared Light-Emitting Diode Treatments in Chronic, Mild Traumatic Brain Injury: Open-Protocol Study

Wavelength:
633, 870
Irradiance:
19.39 and 22.48
Condition:
Cognition, Depression, Emotion, PTSD
Outcome:

11 chronic traumatic brain injury patients were treated with 633 nm and 870 nm infrared three times per week for six weeks. They received 13 J/cm^2 transcranially on 11 sites at midline and bilateral forehead. At 6 weeks they experience better sleep, decreased PTSD and improved social performance.

Red light therapy brain dose

Red and Infrared LED Treatment for Traumatic Brain Injury, Depression and PTSD Case Report

Journal:

Improved Cognitive Function After Transcranial, Light-Emitting Diode Treatments in Chronic, Traumatic Brain Injury: Two Case Reports

Wavelength:
633, 870
Irradiance:
19.39 and 22.48
Condition:
Cognition, Depression, PTSD
Outcome:

Two Chronic Traumatic Brain Injury (TBI) patients who also had depression or post trauamtic stress disorder (PTSD) symptoms  received 633 nm red and 870 nm transcranial light treatment of 13.3 J/cm^2 10 minutes per site, 1x/weeek for 6 years, or 1x/day for 4 months. Researchers treated bilateral left and right forehead (“and multiple other areas”).  At the time of measurement, each had improved executive function, memory and PTSD symptoms.

Red light therapy brain dose

850 nm Transcranial Infrared LED Improves Attentional Performance

Journal:

Beneficial Effects of Transcranial Light Emitting Diode (LED) Therapy on Attentional Performance: An Experimental Design

Wavelength:
850
Irradiance:
285
Condition:
Cognition
Outcome:

39 healthy volunteers received 60 J/cm^2 of 850 nm infrared LED transcranially. They experienced improved attentional performance in the Go/No task.

Red light therapy brain dose

903 nm Transcranial Infrared LED Light Improves qEEG Reaction Time

Journal:

Acute Effects of Near Infrared Light Therapy on Brain State in Healthy Subjects as Quantified by qEEG Measures

Wavelength:
903
Irradiance:
16.67
Condition:
Cognition
Outcome:

In a 2017 study, 31 healthy volunteers received 903 nm LED LumiWave light transcranially. They experienced improved reaction time in the qEEG event-related response test.

Red light therapy brain dose

627 nm Transcranial Red Light Increases Cranial Artery Blood Velocity

Journal:

The effects of transcranial LED therapy (TCLT) on cerebral blood flow in the elderly women

Wavelength:
627
Irradiance:
70
Condition:
Cognition
Outcome:

In a 2015 study, 25 healthy elderly women received 627 nm LED light transcranially at four sites, two times per week for four weeks. They experienced increased cerebral artery velocity at both systolic and idastolic measurements.

Red light therapy brain dose

Transcranial Infrared Treatment Improves Pre-Frontal Rule Based Learning

Journal:

Acute Effects of Near Infrared Light Therapy on Brain State in Healthy Subjects as Quantified by qEEG Measures

Wavelength:
1064
Irradiance:
250
Condition:
Cognition
Outcome:

Blanco et al. 2017 [210] Healthy volunteers (118) Laser, CG-5000, Cell
Gen Therapeutics, LLC (Dallas, TX, USA) 1064 nm 250 mW/cm2, 60 J/cm2, 8 min, one irradiation session, CW Transcranially;
2 sites, lower and upper portion of right lateral forehead at EEG map sites: FP2, F4, and F8 sites Improved prefrontal rule-based learning; no significant effects on information-integration learning

Red light therapy brain dose

Transcranial Infrared Increased Brain Blood Oxygenation

Journal:

Transcranial laser stimulation improves human cerebral oxygenation

Wavelength:
1064
Irradiance:
250
Condition:
Cognition
Outcome:

In a 2016 study 12 healthy volunteers were irradiated with a 1064 nnm laser light dose of 13.75 J/cm^2 per minute for 10 minutes. Light shone on the center forehead and right side. Treated subjects exhibited higher oxygen concentration in hemoglobin across the two hemispheres. Oxygenation increased during treatment and continued at least 6 minutes after.

Red light therapy brain dose

Transcranial Infrared Improves Executive Function Scores

Journal:

Improving executive function using transcranial infrared laser stimulation

Wavelength:
1064
Irradiance:
250
Condition:
Cognition
Outcome:

In a 2015 study 30 healthy volunteers received 60 J/cm^2  1064 nm irradiation on two forehead sites. They showed improved executive function after treatment.

Red light therapy brain dose

Infrared Transcranial Treatment Improves Vigilance, Memory and Mood Scores

Journal:

Transcranial infrared laser stimulation produces beneficial cognitive and emotional effects in humans

Wavelength:
1064
Irradiance:
250
Condition:
Cognition, Emotion
Outcome:

In a 2013 study researchers irradiated 40 healthy volunteers with 60 J/cm^2 1064 nm continuous laser light for 4 minutes. Targets are 2 unilateral transcranial sites: the right frontal pole on 4 cm medial and lateral. The treated group have improved Psychomotor Vigilance Task reaction time, improved memory task scores and a positive mood when measured 2 weeks after treatment.

Red light therapy brain dose

Laser Infrared on Palm Changes Brainwave Amplitude

Journal:

Effect of Low-Level Laser Stimulation on EEG

Wavelength:
830
Irradiance:
42 mW
Condition:
Cognition, Depression, Brainwave
Outcome:

In a 2012 study researchers irradiated 40 healthy volunteers with 830 nm infrared laser light with a dose of 7 mW/diode, 6 diodes, 20 J/cm^2, 10 minutes, pulsed at 10 Hz on the left palm

The treatment increased alpha and theta amplitude in the posterior head region, and decreased beta amplitude in the anterior head region.

Red light therapy brain dose

Traumatic Brain Injury Lesion Red Light Dose

Journal:

Transcranial Photobiomodulation Therapy in the Cognitive Rehabilitation of Patients with Cranioencephalic Trauma

Wavelength:
630
Irradiance:
25.73
Condition:
Cognition, Depression, Emotion, Sleep, Traumatic Brain Injury, Headache, PTSD
Outcome:

Improvements in immediate recall, information processing speed, verbal learning, PTSD stress reduction, depression reduction, reduced headache, improved sleep, and many more benefits.

Red light therapy brain dose

Keto Diet and Alzheimer’s Red Light Dose

Journal:

Nutritional Ketosis and photobiomodulation remediate mitochondria warding off Alzheimer’s disease in a diabetic, ApoE4+ patient with mild cognitive impairment: A case report

Wavelength:
810
Irradiance:
Unknown
Condition:
Cognition, Diabetes
Outcome:

Ketogenic diet and PBM restore cognition, increase insulin sensitivity, improve metabolic flexibilityin diabetic, ApoE4 heterozygous individual.

Red light therapy brain dose

Alzheimer’s Vielight 810 nm Red Light Dose

Journal:

Effects of Home Photobiomodulation Treatments on Cognitive and Behavioral Function, Cerebral Perfusion, and Resting-State Functional Connectivity in Patients With Dementia: A Pilot Trial

Wavelength:
810
Irradiance:
Intransal irradiance week 1, 14.2 mW/cm^2; week 2: 23 mW/cm^2; transcranial irradiance week 2: 41 mW/cm^2
Condition:
Cognition, Dementia/Alzheimers
Outcome:

Intranasal and transcranial application of 810 nm improved memory, cognition and MRI results in Alzheimer’s patients.

Red light therapy brain dose

Reverse Cognitive Decline Red Light Dose

Journal:

Rapid Reversal of Cognitive Decline, Olfactory Dysfunction, and Quality of Life Using Multi-Modality Photobiomodulation Therapy: Case Report.

Wavelength:
635, 810
Irradiance:
Unknown
Condition:
Cognition, Dementia/Alzheimers
Outcome:

Alzheimer’s patient treatment: Improve cognitive and memory scores; regain sense of smell; reduce stress in patient and caregiver.

Red light therapy brain dose

Traumatic Brain Injury Red Light Dose

Journal:

Improved Cognitive Function After Transcranial, Light-Emitting Diode Treatments in Chronic, Traumatic Brain Injury: Two Case Reports

Wavelength:
633, 870
Irradiance:
22.2 mW/cm^2
Condition:
Cognition, Traumatic Brain Injury
Outcome:

Improve cognition and memory in chronic TBI patients.

Red Light Therapy circulation dose

Increased Brain Blood Flow Red Light Dose

Journal:

The Effects of Transcranial LED Therapy (TCLT) on Cerebral Blood Flow in the Elderly Women

Wavelength:
627
Irradiance:
70
Condition:
Cognition, Dementia/Alzheimers, Traumatic Brain Injury
Outcome:

Increase cerebral artery blood floow, decrease resistance.

Red light therapy brain dose

Therapy Results Similar to Aerobic Exercise Red Light Dose

Journal:

Cognitive Enhancement by Transcranial Laser Stimulation and Acute Aerobic Exercise

Wavelength:
1064
Irradiance:
250
Condition:
Cognition, Exercise
Outcome:

Improve vigilance task and working memory scores similar to that seen with 20 minutes of aerobic exercise.

Red light therapy brain dose

Better Reaction Time in Concussion Patients Red Light Dose

Journal:

Acute Effects of Near Infrared Light Therapy on Brain State in Healthy Subjects as Quantified by qEEG Measures

Wavelength:
903
Irradiance:
16.67
Condition:
Cognition, Dementia/Alzheimers, Traumatic Brain Injury
Outcome:

Decrease physical reaction times in concussion patients.

Red light therapy brain dose

Reduce Cognitive Decline Biomarkers Red Light Dose

Journal:

Beneficial Neurocognitive Effects of Transcranial Laser in Older Adults

Wavelength:
1064
Irradiance:
250
Condition:
Cognition, Dementia/Alzheimers
Outcome:

Improve memory and increase brain blood oxygen in patients at risk for cognitive decline.

Red light therapy brain dose

Traumatic Brain Injury Anxiety and Depression Red Light Dose

Journal:

Psychological Benefits 2 and 4 Weeks After a Single Treatment With Near Infrared Light to the Forehead: A Pilot Study of 10 Patients With Major Depression and Anxiety

Wavelength:
810, 980
Irradiance:
810 nm, 13.2 W/0.89 cm^2, and 810 and 980 nm, 9W/0.89 cm^2
Condition:
Addiction, Alcoholism, Anxiety, Cognition, Depression, Emotion, Traumatic Brain Injury, PTSD
Outcome:

Decrease depression and anxiety in TBI patients.

Red light therapy brain dose

Improved Brain Oxygenation Red Light Dose

Journal:

Transcranial Laser Stimulation Improves Human Cerebral Oxygenation

Wavelength:
1064
Irradiance:
250
Condition:
Cognition, Dementia/Alzheimers, Traumatic Brain Injury
Outcome:

Improve brain oxygen supply.

Red light therapy brain dose

Increase Brain Blood Flow in Vegetative Patient Red Light Dose

Journal:

Focal Increase in Cerebral Blood Flow After Treatment With Near-Infrared Light to the Forehead in a Patient in a Persistent Vegetative State

Wavelength:
830
Irradiance:
11.4
Condition:
Cognition, Traumatic Brain Injury
Outcome:

830 nm, 11.4 mW/cm^2, 1800 s, 2/day/73 days (146) improved blood flow and correlated with patient regaining cognition.

“The patient showed some improvement in his neurological condition by moving his left arm/hand to reach the tracheostomy tube, post-LED therapy.”

About the EMF Channel Light Dose Database

Many people purchase red light therapy or neuromuscular electrical stimulation devices without knowing optimal doses for the results they want to see. The right dose is especially key to light therapies, which have optimal windows of wavelength and energy delivered. Treatment doses outside of those windows will nullify results or harm the user. I took the results from successful EMF studies when these studies included:

  • Photobiomodulation (Red Light Therapy, Blue Light Therapy, Low Level Light Therapy)
  • Transcutaneous Electromagnetic Nerve Stimulation (TENS)
  • Pulsed Electromagnetic Field (PEMF) Therapy
  • Neuromuscular Electrical Stimulation (NMES)

Many studies do not report exact dose parameters they used. They are therefore not included here, even the study reported a therapeutic result.

Light Dose Parameters
Term
Parameter
Time
Seconds
Power
milliwatts (mW) or Watts (W)
Total Dose Energy
joules (J) = power x time = Watts x seconds
Wavelength
nanometers
Frequency
Hertz (Hz)
Spot Size
cm(2) (centimeters squared)
Duty Cycle
percentage of time light source is on during one cycle
Power Density (or Intensity)
Watts per centimeters squared (W/cm(2) = power / probe size
Energy Density (Fluence)
jules per centimeters square (J/cm(2)) = total energy delivered by the probe size

Source: Turchin, Curtis. Light and Laser Therapy: Clinical Procedures 6th Edition (p. 16)

Image by Thomas-Suisse from Pixabay