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Low-Level Laser Therapy in the Treatment of Pain

Mercoledì, 07 Marzo 2012 13:47   |   Scritto da 
Charles Mitchley

Extract from: "Phototherapy and the Peripheral Nervous System"

By Roberta Chow, M.B., B.S.(Hons.), F.R.A.C.G.P., F.A.M.A.C., Ph.D.

“Effects of laser irradiation on the peripheral nervous system (PNS) underlie the potential for phototherapy to be acknowledged as a mainstream therapy for the future. Pain and inflammation are among the most important manifestations of PNS function and the spectrum of diseases with these symptoms and signs, from osteoarthritisto diabetic neuropathy, which can be modified by phototherapy, is vast."

“Both pain and inflammation are mediated by unmyelinated peripheral nerve terminals of small diameter Ad and C fibers, the nociceptors, which lie a few microns below the surface of the skin in the epidermis. The superficial nature of these fibers means that these important somatosensory nerves are within the penetration depths of all laser and LED wavelengths. These afferent nerve endings connect the outside world via second order neurons to the midbrain, subcortical, and cortical centers of the brain.”

“...Neural inflammation, which is the phenomenon of inflammation arising from the release of bioactive substances, such asbradykinin, from activated peripheral sensory nerve endings, is an important but often unrecognized component of any acute or chronic pain condition. This too, in addition to pain, can be inhibited by suppression of activity of peripheral nerve endings. The absorption of photons by this complex neural network of the somatosensory nervous system is one of the mechanisms underlying modulation of pain and inflammation, and is one of the most important applications of phototherapy.”

“In acute pain, such as that arising from accidental injury or intentional injury (surgery), direct effects of laser irradiation to the site can offer both immediate and long-term benefits.”

“...Kevin Moore’s seminal work showing a dramatic reduction in postoperative pain and drug intake following immediate postoperative laser irradiation to a surgical incision, illustrates the benefits of the antinociceptive and anti-inflammatory effects of a single application of phototherapy.”

“...The capacity of phototherapy to relieve acute pain, whatever the cause, by suppression of neural activity at the site of acute injury, is also very important in modulating downstream spinal cord response. In acute pain, changes such as sprouting of neurites in the dorsal horn of the spinal cord, which set up conditions for acute pain to become chronic, occur within a few hours of injury. Long-term suppression of pain by phototherapy applied in acute conditions is seen in a neck pain study where treatment of acute pain suppressed recurrence 6 months later.”

“...Clinically, phototherapy will affect all the cells and tissues in the irradiated area in addition to having effects on the nerve alone, and this multiplicity of concurrent effects contributes to the overall recovery of the patient.”

Photomedicine and Laser Surgery

Volume 29, Number 9, 2011

Mary Ann Liebert, Inc.

Pp. 591–592
DOI: 10.1089/pho.2011.9904

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Riguardo all'autore:

I am committed to supporting the worldwide growth of coMra-Therapy as a result of first-hand experience of its results on people with pain and chronic illness. I work with doctors, nurses and individuals in many areas, to help bring an understanding of coMra and how it can best be applied in the treatment of a variety of conditions. Working together with, and helping different people is for me a Path with a Heart.