Journal
SKIN RESEARCH AND TECHNOLOGY
Volume 23, Issue 3, Pages 363-368Publisher
WILEY
DOI: 10.1111/srt.12344
Keywords
skin conductance; skin potential; bioimpedance; modelling
Categories
Funding
- EPSRC Doctoral Training Centre [EP/G03690X/1]
- Engineering and Physical Sciences Research Council [1234887] Funding Source: researchfish
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Background: Electrical signals are recorded from and sent into the body via the skin in a number of applications. In practice, skin is often hydrated with liquids having different conductivities so a model was produced in order to determine the relationship between skin impedance and conductivity. Methods: A model representing the skin was subjected to a variety of electrical signals. The parts of the model representing the stratum corneum were given different conductivities to represent different levels of hydration. Results: The overall impedance and conductivity of the cells did not vary at frequencies below 40 kHz. Above 40 kHz, levels of increased conductivity caused the overall impedance to decrease. Conclusion: The variation in impedance with conductivity between 5 and 50 mSm(-1) can be modelled quadratically while variation in impedance with conductivity between 5 and 5000 mSm(-1) can be modelled with a double exponential decay.
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