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Conformable Electrode Arrays for Wearable Neuroprostheses.

Narrendar RaviChandran1,2, Mei Ying Teo3, Andrew McDaid1

  • 1Medical Devices and Technologies Group, Department of Mechanical and Mechatronics Engineering, The University of Auckland, Auckland 1010, New Zealand.

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Summary
This summary is machine-generated.

Researchers developed customizable, wearable electrode arrays for personalized rehabilitation. These noninvasive devices offer comfort and effective muscle stimulation for hand function restoration, paving the way for cost-effective wearable systems.

Keywords:
carbon blackelastomerelectrode arrayfunctional electrical stimulationhand function

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Area of Science:

  • Biomedical Engineering
  • Materials Science
  • Rehabilitation Technology

Background:

  • Wearable electrode arrays offer noninvasive muscle stimulation for personalized rehabilitation.
  • Current arrays require customization for user physiology and comfort during extended wear.
  • Scalable, economical fabrication methods are needed for personalized electrode arrays.

Purpose of the Study:

  • To develop personalizable electrode arrays using a multilayer screen-printing technique.
  • To embed conductive materials into silicone-based elastomers for enhanced conductivity and flexibility.
  • To evaluate the efficacy of these arrays for stimulating hand function tasks.

Main Methods:

  • Utilized multilayer screen-printing to embed carbon black (CB) into silicone-based elastomers.
  • Varied CB to elastomer weight ratios (1:8 and 1:9) to achieve desired conductivity.
  • Tested conductivity, stretching performance (up to 200%), and in vivo efficacy for hand function stimulation.

Main Results:

  • Achieved conductivities of 0.0021-0.0030 S cm-1, suitable for transcutaneous stimulation.
  • Demonstrated maintained stimulation performance after multiple stretching cycles.
  • Successfully evaluated the electrode arrays' efficacy in stimulating hand function tasks in vivo.

Conclusions:

  • Developed a soft, conformable, and customizable electrode array using screen-printing.
  • The fabricated arrays are suitable for noninvasive, personalized rehabilitation.
  • This technology supports the development of cost-effective wearable stimulation systems for restoring hand function.