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Related Experiment Video

Updated: Aug 11, 2025

Fabrication of High Contact-Density, Flat-Interface Nerve Electrodes for Recording and Stimulation Applications
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Self-Closing Stretchable Cuff Electrodes for Peripheral Nerve Stimulation and Electromyographic Signal Recording.

Mei Yu1,2, Changxian Wang3, Huanqing Cui1,4

  • 1Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, 1068 Xueyuan Avenue, Shenzhen 518055, China.

ACS Applied Materials & Interfaces
|February 3, 2023
PubMed
Summary

A novel self-closing stretchable cuff electrode conforms to biological tissues. This electrode enables reliable physiological signal detection and stimulation regulation without extra mechanical structures.

Keywords:
electromyographynerve stimulationperipheral nervous systemself-closing electrodesstretchable cuff electrodes

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Area of Science:

  • Biomedical Engineering
  • Materials Science
  • Neuroscience

Background:

  • Reliable interfaces between cuff electrodes and complex biological tissues are crucial for physiological signal detection and stimulation.
  • Existing electrodes often require complex mechanical structures for secure tissue contact, potentially causing discomfort or damage.

Purpose of the Study:

  • To develop a self-closing stretchable cuff electrode that ensures reliable and non-excessive interfaces with biological tissues.
  • To investigate the electrode's ability to conform to curved tissue surfaces and maintain stable contact for extended periods.

Main Methods:

  • Fabrication of a stretchable cuff electrode utilizing a mechanical stress mismatch between elastic substrate layers to induce self-closing.
  • Selection of substrate materials to match the elastic modulus of target tissues for minimal constraint.
  • In vivo testing involving sciatic nerve stimulation and electromyographic signal monitoring in rats over one month.

Main Results:

  • The proposed cuff electrode demonstrated self-closing capability upon water exposure, enabling secure attachment to tissue bundles.
  • The electrode material's modulus was adaptable to match surrounding tissues, minimizing mechanical constraints.
  • In vivo experiments confirmed the electrode's stable performance for both nerve stimulation and signal monitoring around the rat's extensor digitorum longus muscle for 30 days.

Conclusions:

  • The self-closing stretchable cuff electrode offers a promising solution for stable and conformal interfacing with biological tissues.
  • This design eliminates the need for external mechanical locking structures, simplifying application and reducing tissue irritation.
  • The electrode's adaptability and sustained performance in vivo highlight its potential for various neurophysiological applications.