Cited by 76Neuroscience and Neural EngineeringOptical Imaging and Spectroscopy TechniquesLaser Applications in Dentistry and Medicine

Combined optical and electrical stimulation of neural tissue in vivo

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Duke, Austin R., Cayce, Jonathan M., Malphrus, Jonathan D., Konrad, Peter, Mahadevan-Jansen, Anita, Jansen, E. Duco·2009·Journal of Biomedical Optics

Abstract

Low-intensity, pulsed infrared light provides a novel nerve stimulation modality that avoids the limitations of traditional electrical methods such as necessity of contact, presence of a stimulation artifact, and relatively poor spatial precision. Infrared neural stimulation (INS) is, however, limited by a 2:1 ratio of threshold radiant exposures for damage to that for stimulation. We have shown that this ratio is increased to nearly 6:1 by combining the infrared pulse with a subthreshold electrical stimulus. Our results indicate a nonlinear relationship between the subthreshold depolarizing electrical stimulus and additional optical energy required to reach stimulation threshold. The change in optical threshold decreases linearly as the delay between the electrical and optical pulses is increased. We have shown that the high spatial precision of INS is maintained for this combined stimulation modality. Results of this study will facilitate the development of applications for infrared neural stimulation, as well as target the efforts to uncover the mechanism by which infrared light activates neural tissue.

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  • Recent studies with rats combining peripheral nerve electrodes and infrared nerve stimulation yielded good results in generating sustained muscle contractions, and demonstrated a decrease in required optical energy when infrared nerve stimulation was combined with electrical methods.

    “This method yielded good results in generating sustained muscle contractions [141], and it demonstrated the decrease in required optical energy when infrared nerve stimulation was combined with electrical methods [142].”

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Authors
Duke, A. R., Cayce, J. M., Malphrus, J. D., Konrad, P., Mahadevan-Jansen, A., & Jansen, E. D.
Affiliations
  • Vanderbilt University (US)
  • Vanderbilt Univ.
Venue
Journal of Biomedical Optics
Published
2009-11-01
Volume
14
Issue
06
Pages
1-3
ISSN
  • 1083-3668 (ISSN-L)
  • 1560-2281
OpenAlex
W2027775743
Cited by
76
References
65
Citations by year
2026: 2 · 2025: 3 · 2024: 1 · 2023: 7 · 2022: 2 · 2021: 5 · 2020: 6 · 2019: 7 · 2018: 3 · 2017: 4 · 2016: 9 · 2015: 4 · 2014: 6 · 2013: 5 · 2012: 8
FWCI
1.66
Type
journal article
Language
en
Open access
Locations
  • Journal of Biomedical Optics (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Institute of Neurological Disorders and Stroke (R01NS052407)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neural Engineering
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Optical Imaging and Spectroscopy Techniques
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Laser Applications in Dentistry and Medicine
Keywords
infrared neural stimulation, radiant exposure, neurostimulation, pulse delay, spatial precision
MeSH terms
Animals, Electric Stimulation, Infrared Rays, Male, Models, Neurological, Nerve Tissue, Photic Stimulation, Sciatic Nerve, Sensory Thresholds, Rats, Sprague-Dawley, Rats

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