Electronics integrated to the muscle via 'Kirigami'

phys.org | 12/9/2019 | Staff
CarisCaris (Posted by) Level 3
Click For Photo: https://scx2.b-cdn.net/gfx/news/2019/electronicsi.jpg

2D donut shape (left: before deformation) and 3D cylindrical shape (right: after deformation). Credit: Toyohashi University Of Technology.

A research team in the Department of Electrical and Electronic Information Engineering and EIIRIS at Toyohashi University of Technology has developed a donut-shaped kirigami device for EMG recordings. The proposed device reduces device displacement on a large deformable muscle surface. Accurate and robust EMG recordings offer EMG signal-based human-machine interfaces that allow prosthesis control for amputees. The results of their research were published in an issue of Advanced Healthcare Materials on December 5, 2019. The article also appeared on the inside back cover.

Accurate - EMG - Signal - Recording - EMG

An accurate and robust EMG signal recording is necessary in EMG signal-based human-machine interfaces to allow prosthesis control for amputees using their residual muscle. In 2017, the same research team previously proposed an electrode device using the kirigami structure for the intimate integration of the electronic device and biological tissues. (Y. Morikawa et al) The remarkable potential of the kirigami structure stems from its high stretchability, including its high strain ratio and small force necessary to be applied during device stretches. The kirigami structure can be stretched with a low strain force and its mechanical characteristics are similar to soft biological tissues, such as in the brain and muscles. However, it is challenging to obtain an accurate and robust bio-signal recording without displacement of the electrode. Device displacement occurs when the kirigami device is applied to biological tissues, such as the heart and muscles, which undergo large deformation.

A research team in the Department of Electrica Engineering and the EIIRIS at Toyohashi University of Technology has developed donut-shaped kirigami device for EMG recording to solve the issue of device displacement during muscle deformation.

Image - EMG - Signal - Recording - Kirigami

Schematic image showing the EMG signal recording (left) and photograph showing the donut-shaped kirigami device attached on the muscle surface...
(Excerpt) Read more at: phys.org
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