Cited by 20Neuroscience and Neural EngineeringPain Management and TreatmentVagus Nerve Stimulation Research

Electrically evoked responses in the rabbit cortex induced by current steering with penetrating optic nerve electrodes

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Yan, Yan, Lu, Yiliang, Li, Menghui, Ma, Zengguang, Cao, Pengjia, Chen, Yao, Sun, Xiaodong, Chai, Xinyu +2 more·2016·Investigative Opthalmology & Visual Science

Abstract

Purpose: Current steering is a neural stimulation strategy that uses simultaneous stimulation of adjacent electrodes to produce additional intermediate stimulation sites and thus improves spatial resolution. We investigated the feasibility of current steering using electrophysiological and computational methods after implanting paired penetrating electrodes into the rabbit's optic nerve (ON). Methods: Penetrating electrodes at different interelectrode distances were implanted into the ON and electrically evoked cortical potentials (EEPs) in V1 recorded with a 6 × 8 array. The current thresholds, EEP amplitudes, and spatial distributions were analyzed during current steering. Computational simulation studies were performed based on finite element models to calculate the area and spatial distribution of recruited ON fibers using a current steering stimulation strategy. Results: Threshold reduction and EEP amplitude enhancement were found with simultaneous stimulation of closely spaced electrode pairs. Spatially shifted cortical responses were achieved using current steering, whereas the amplitudes and spatial spreads of the responses were similar to that elicited by a single electrode. Computational simulations suggested that the centroid of the ON recruitment area could be modulated by current steering while the total recruitment area did not show any appreciable variability at a fixed current intensity. Conclusions: Current steering is a useful strategy to enhance the spatial resolution of an ON prosthesis without increasing the number of physical electrodes. This study provides useful information for optimizing the design of stimulation strategies with a penetrating ON prosthesis.

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Crossref · 10.1167/iovs.15-17543

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  • Different groups demonstrated that spatially organised phosphenes are induced by applying current-steering or modulating current amplitudes during optic nerve stimulation.

    “Different groups demonstrated that spatially organised phosphenes are induced by applying current-steering or modulating current amplitudes during optic nerve stimulation [65,73].”

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Authors
Yan, Y., Lu, Y., Li, M., Ma, Z., Cao, P., Chen, Y., Sun, X., Chai, X., Ren, Q., & Li, L.
Affiliations
  • Shanghai Jiao Tong University (CN)
  • Chinese Academy of Sciences (CN)
  • Peking University (CN)
Venue
Investigative Opthalmology & Visual Science
Published
2016-11-18
Volume
57
Issue
14
Pages
6327
ISSN
  • 0146-0404 (ISSN-L)
  • 1552-5783
OpenAlex
W2557847745
Cited by
20
References
54
Citations by year
2026: 1 · 2025: 1 · 2024: 3 · 2023: 1 · 2022: 2 · 2021: 2 · 2020: 4 · 2019: 3 · 2018: 3
FWCI
1.12
Type
journal article
Language
en
Open access
Locations
  • Investigative Ophthalmology & Visual Science (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neural Engineering
  • Health Sciences › Medicine › Anesthesiology and Pain Medicine › Pain Management and Treatment
  • Life Sciences › Neuroscience › Neurology › Vagus Nerve Stimulation Research
Keywords
current steering, electrically evoked potentials, visual cortex, spatial resolution, threshold current, finite element analysis, rabbit model
MeSH terms
Animals, Computer Simulation, Electric Stimulation, Electrodes, Implanted, Evoked Potentials, Visual, Feasibility Studies, Optic Nerve, Photic Stimulation, Rabbits, Visual Cortex

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