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🐀 Rat · 2022 · China (Chengdu)

40 Hz Blue LED Relieves the Gamma Oscillations Changes Caused by Traumatic Brain Injury in Rat

Yang · Front Neurol · 2022

The protocol this study used

Wavelength
473 nm
Dose
40 J/cm²
Sessions
6
Per session
4 min

What the authors concluded

TBI causes the decrease of gamma oscillations on the injured side of the brain of rats. The 40 hz Blue LED therapy could relieve the gamma oscillation changes caused by TBI and improve the prognosis of TBI.

Devices that emit this wavelength

Matched on wavelength within 15nm, since LED bins vary by roughly that much and a tighter match would be false precision. Where we have an irradiance figure, the session length is the time needed to reach this study's dose of 40 J/cm² at that intensity.

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PlatinumLED BIOMAX 900
480 · 630 · 660 · 810 · 830 · 850 · 1060 nm
Measured
$1,299
≈ 7 min 23 sec / session
at 90.3 mW/cm²
PlatinumLED BIOMAX 300
480 · 630 · 660 · 810 · 830 · 850 · 1060 nm
Measured
$659
≈ 9 min 31 sec / session
at 70 mW/cm²
PlatinumLED BIOMAX PRO ULTRA
480 · 630 · 660 · 810 · 830 · 850 · 1060 nm
Measured
$1,599
≈ 6 min 36 sec / session
at 101 mW/cm²
PlatinumLED SaunaMAX Pro
480 · 630 · 660 · 810 · 830 · 850 nm
Measured
$959
≈ 16 min 13 sec / session
at 41.1 mW/cm²
PlatinumLED BIOMAX 600
480 · 630 · 660 · 810 · 830 · 850 · 1060 nm
Brand claim
$1,049
≈ 5 min 10 sec / session
at 129 mW/cm²
Hooga Red Light Therapy Facial Wand
415 · 460 · 630 nm
Not published
$70
no irradiance published

Matching a wavelength is not the same as reproducing a trial. Session times assume the device's published irradiance is accurate at the distance it was measured, which on brand-claim figures is often optimistic. Where a device publishes both a peak and an average we use the average, and where it publishes a falloff curve we use the lowest figure, so these times run long rather than short. Clinical protocols also control for spot size, contact and skin type in ways a home device cannot.

Source

PubMed 35800078 →

Dosimetry extracted by Vladimir Heiskanen in Photobiomodulation (PBM) research - a comprehensive database. Citation resolved against PubMed.