The DOI matches its Crossref record; 46 of the 46 references it cites were found in a registry or an index.
A finite-element model of the mechanical effects of implantable microelectrodes in the cerebral cortex
Open accessAbstract
The viability of chronic neural microelectrodes for electrophysiological recording and stimulation depends on several factors, including the encapsulation of the implant by a reactive tissue response. We postulate that mechanical strains induced around the implant site may be one of the leading factors responsible for the sustained tissue response in chronic implants. The objectives of this study were to develop a finite-element model of the probe-brain tissue interface and analyze the effects of tethering forces, probe-tissue adhesion and stiffness of the probe substrate on the interfacial strains induced around the implant site. A 3D finite-element model of the probe-brain tissue microenvironment was developed and used to simulate interfacial strains created by 'micromotion' of chronically implanted microelectrodes. Three candidate substrates were considered: (a) silicon, (b) polyimide and (c) a hypothetical 'soft' material. Simulated tethering forces resulted in elevated strains both at the tip and at the sharp edges of the probe track in the tissue. The strain fields induced by a simulated silicon probe were similar to those induced by a simulated polyimide probe, albeit at higher absolute values for radial tethering forces. Simulations of poor probe-tissue adhesion resulted in elevated strains at the tip and delamination of the tissue from the probe. A tangential tethering force results in 94% reduction in the strain value at the tip of the polyimide probe track in the tissue, whereas the simulated 'soft' probe induced two orders of magnitude smaller values of strain compared to a simulated silicon probe. The model results indicate that softer substrates reduce the strain at the probe-tissue interface and thus may also reduce tissue response in chronic implants.
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“the polyimide material demonstrated a 94% reduction in applied strain to the surrounding tissue, while strain with the theoretical 6 MPa material was reduced by two orders of magnitude.”
From Biocompatible Materials for Continuous Glucose Monitoring Devices (2013) · cites this paper as [169]
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Design of biodegradable, implantable devices towards clinical translation
Li, C., Guo, C., Fitzpatrick, V., Ibrahim, A. G. A., Zwierstra, M. J., Hanna, P. C., Lechtig, A., Nazarian, A., Lin, S. J., & Kaplan, D. L. (2019) · Nature Reviews Materials · doi:10.1038/s41578-019-0150-z · Cited by 828
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Self-citationBrain Tissue Responses to Neural Implants Impact Signal Sensitivity and Intervention Strategies
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Nanomaterials for Neural Interfaces
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Metadata
- Authors
- Subbaroyan, J., Martin, D. C., & Kipke, D. R.
- Affiliations
- University of Michigan (US)
- Venue
- Journal of Neural Engineering
- Publisher
- IOP Publishing
- Published
- 2005-10-11
- Volume
- 2
- Issue
- 4
- Pages
- 103-113
- ISSN
- 1741-2552 (ISSN-L)
- 1741-2560
- OpenAlex
- W1982562840
- Cited by
- 368
- References
- 46
- Citations by year
- 2026: 13 · 2025: 20 · 2024: 14 · 2023: 17 · 2022: 15 · 2021: 21 · 2020: 27 · 2019: 19 · 2018: 29 · 2017: 15 · 2016: 24 · 2015: 23 · 2014: 20 · 2013: 24 · 2012: 14
- FWCI
- 3.85
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Journal of Neural Engineering (publishedVersion)
- PubMed (publishedVersion)
- Deep Blue (University of Michigan) (submittedVersion)
- Funders
- National Science Foundation (9986866)
- National Aeronautics and Space Administration
- National Institutes of Health
- National Nanotechnology Coordinating Office
- National Institute of Biomedical Imaging and Bioengineering (P41 EB-00 230-10)
- Topics
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neural Engineering
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular Mechanics and Interactions
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Analog and Mixed-Signal Circuit Design
- Keywords
- implantable microelectrodes, cerebral cortex, interfacial strain, silicon probes, tissue encapsulation, electrophysiological recording, neurostimulation
- MeSH terms
- Animals, Biomechanical Phenomena, Cerebral Cortex, Computer Simulation, Elasticity, Electrodes, Implanted, Humans, Microelectrodes, Models, Neurological, Motion, Physical Stimulation, Stress, Mechanical, Finite Element Analysis, Mechanotransduction, Cellular
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