Cited by 166Neuroscience and Neural EngineeringVagus Nerve Stimulation ResearchNeural dynamics and brain function

Energy-efficient waveform shapes for neural stimulation revealed with a genetic algorithm

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Wongsarnpigoon, Amorn, Grill, Warren M·2010·Journal of Neural Engineering

Abstract

The energy efficiency of stimulation is an important consideration for battery-powered implantable stimulators. We used a genetic algorithm (GA) to determine the energy-optimal waveform shape for neural stimulation. The GA was coupled to a computational model of extracellular stimulation of a mammalian myelinated axon. As the GA progressed, waveforms became increasingly energy efficient and converged upon an energy-optimal shape. The results of the GA were consistent across several trials, and resulting waveforms resembled truncated Gaussian curves. When constrained to monophasic cathodic waveforms, the GA produced waveforms that were symmetric about the peak, which occurred approximately during the middle of the pulse. However, when the cathodic waveforms were coupled to rectangular charge-balancing anodic pulses, the location and sharpness of the peak varied with the duration and timing (i.e., before or after the cathodic phase) of the anodic phase. In a model of a population of mammalian axons and in vivo experiments on a cat sciatic nerve, the GA-optimized waveforms were more energy efficient and charge efficient than several conventional waveform shapes used in neural stimulation. If used in implantable neural stimulators, GA-optimized waveforms could prolong battery life, thereby reducing the frequency of recharge intervals, the volume of implanted pulse generators, and the costs and risks of battery-replacement surgeries.

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  • In implanted devices, exponential-shaped waveforms utilizing minimal energy can minimize the power requirement for activation of larger and closer axons.

    “In implanted devices, exponential-shaped waveforms, utilizing minimal energy, can be used to minimize the power requirement for activation of larger and closer axons (Wongsarnpigoon and Grill, 2010; Krouchev et al., 2014).”

    From Selectivity and Longevity of Peripheral-Nerve and Machine Interfaces: A Review. (2017) · cites this paper as Wongsarnpigoon and Grill, 2010

    The Introduction says rising exponential waveforms were no more energy-efficient than several conventional shapes in realistic models and in vivo experiments. The Results (Efficiency of GA waveforms in the population model) instead find that GA-optimized waveforms used less energy than conventional shapes, including exponentials, regardless of axon position relative to the electrode. The paper therefore does not support exponential waveforms as the minimum-energy choice for activating larger or closer axons. (LLM, conf=0.88)

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Research works printed but not linked: 1

  1. Sweeney JD Mortimer JD Durand D 1987 Modeling of mammalian myelinated nerve for functional neuromuscular stimulation IEEE/Ninth Annu Conf Eng Med Biol Sci Boston, MA

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Authors
Wongsarnpigoon, A., & Grill, W. M.
Affiliations
Duke University (US)
Venue
Journal of Neural Engineering
Published
2010-06-23
Volume
7
Issue
4
Pages
046009
ISSN
  • 1741-2552 (ISSN-L)
  • 1741-2560
OpenAlex
W2094180230
Cited by
166
References
25
Citations by year
2026: 5 · 2025: 8 · 2024: 5 · 2023: 13 · 2022: 12 · 2021: 4 · 2020: 11 · 2019: 10 · 2018: 19 · 2017: 16 · 2016: 16 · 2015: 15 · 2014: 12 · 2013: 9 · 2012: 5
FWCI
2.59
Type
journal article
Language
en
Open access
Locations
  • Journal of Neural Engineering (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health
  • National Institute of Neurological Disorders and Stroke (R01NS040894, R21NS054048)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neural Engineering
  • Life Sciences › Neuroscience › Neurology › Vagus Nerve Stimulation Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
Keywords
neurostimulation, genetic algorithm optimization, implantable neural stimulator, battery life, extracellular stimulation, myelinated axons, charge balancing, sciatic nerve, charging efficiency, wave shape
MeSH terms
Action Potentials, Algorithms, Animals, Cats, Computer Simulation, Electric Stimulation, Energy Transfer, Male, Models, Genetic, Models, Neurological, Sciatic Nerve, Muscle, Skeletal

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