Abstract
Twenty rats underwent a crush injury to their sciatic nerve, followed immediately by a single low-power coherent or non-coherent irradiation administered transcutaneously on the projection of an injured peripheral nerve. Five wavelengths were tested: 632.8, 660, 830, 880 and 950 nm. The electrical activities of the crushed nerve, immediately after irradiation and on the following first, third and seventh day post-crush, were compared to the precrush activity. The results indicate that energy at the wavelength of 632.8 nm (CW He-Ne laser), delivered transcutaneously (10 J cm−2 at each point) along the projections of the nerve, prevents the drop in the functional nerve activity as measured by the combined action potential (AP) after crush injury. Other wavelengths were either less effective (660 nm) or totally ineffective under the same conditions. The beneficial effects were temporary and lasted only one day after injury and the single irradiation session.
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Rochkind, S., Nissan, M. & Lubart, A. A single transcutaneous light irradiation to injured peripheral nerve: Comparative study with five different wavelengths. Laser Med Sci 4, 259–263 (1989). https://doi.org/10.1007/BF02032456
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DOI: https://doi.org/10.1007/BF02032456