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A Piezoresistive Sensor to Measure Muscle Contraction and Mechanomyography
- Source :
- Sensors (Basel, Switzerland), Sensors, Vol 18, Iss 8, p 2553 (2018), Sensors, Volume 18, Issue 8
- Publication Year :
- 2018
- Publisher :
- MDPI, 2018.
-
Abstract
- Measurement of muscle contraction is mainly achieved through electromyography (EMG) and is an area of interest for many biomedical applications, including prosthesis control and human machine interface. However, EMG has some drawbacks, and there are also alternative methods for measuring muscle activity, such as by monitoring the mechanical variations that occur during contraction. In this study, a new, simple, non-invasive sensor based on a force-sensitive resistor (FSR) which is able to measure muscle contraction is presented. The sensor, applied on the skin through a rigid dome, senses the mechanical force exerted by the underlying contracting muscles. Although FSR creep causes output drift, it was found that appropriate FSR conditioning reduces the drift by fixing the voltage across the FSR and provides voltage output proportional to force. In addition to the larger contraction signal, the sensor was able to detect the mechanomyogram (MMG), i.e., the little vibrations which occur during muscle contraction. The frequency response of the FSR sensor was found to be large enough to correctly measure the MMG. Simultaneous recordings from flexor carpi ulnaris showed a high correlation (Pearson&rsquo<br />s r &gt<br />0.9) between the FSR output and the EMG linear envelope. Preliminary validation tests on healthy subjects showed the ability of the FSR sensor, used instead of the EMG, to proportionally control a hand prosthesis, achieving comparable performances.
- Subjects :
- Frequency response
electromyography
Atomic and Molecular Physics, and Optic
Flexor Carpi Ulnaris
human machine interface
02 engineering and technology
Electromyography
lcsh:Chemical technology
01 natural sciences
Biochemistry
Vibration
Article
Analytical Chemistry
muscle contraction
Force-sensing resistor
medicine
Elbow
Humans
lcsh:TP1-1185
mechanomyography
Electrical and Electronic Engineering
Muscle, Skeletal
Instrumentation
Physics
Mechanomyogram
medicine.diagnostic_test
010401 analytical chemistry
Prostheses and Implants
021001 nanoscience & nanotechnology
Hand
Piezoresistive effect
Atomic and Molecular Physics, and Optics
0104 chemical sciences
force sensitive resistor
prosthesis control
medicine.symptom
0210 nano-technology
Muscle contraction
Biomedical engineering
Subjects
Details
- Language :
- English
- ISSN :
- 14248220
- Volume :
- 18
- Issue :
- 8
- Database :
- OpenAIRE
- Journal :
- Sensors (Basel, Switzerland)
- Accession number :
- edsair.doi.dedup.....e3f04f8c03b0d508430a91f0fd1f6fee