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Open Access Publications from the University of California

Novel wavelengths for laser nerve stimulation

  • Author(s): McCaughey, RG
  • Chlebicki, C
  • Wong, BJF
  • et al.

Published Web Location Commons Attribution 4.0 International Public License

Background: Laser light is known to stimulate nerves. This study investigated alternative wavelengths for nerve stimulation. Materials and Methods: The sciatic nerves of rats were irradiated with four different lasers - a Ho:YAG (2100 nm), a Yb:glass fiber laser (1495 nm) and diode lasers (1450nm and 1540 nm). Results: All lasers evoked a visible leg twitch response, and electromyography confirmed muscle activation. The Yb:glass laser at 1495nm delivered through a single mode fiber was found to be the most effective stimulus. The stimulation threshold for a 2 millisecond pulse from the Yb:glass laser was determined to be 3.7±2.8 mJ/cm2. Conclusions: The Yb:glass laser has the potential for use in neurostimulation, as an alternative to electrical stimulation. © 2009 Wiley-Liss, Inc.

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