A.V. Kobelev1, A.N. Briko2, S.I. Shchukin3

1–3 Bauman Moscow State Technical University (Moscow, Russia),
1 ak@bmstu.ru

The purpose of this work is development of an adequate mathematical model of forearm tissues for establishing the relationship between electrical impedance measurements and biomechanical parameters of muscles. The paper considers two models – a homogeneous medium and a two-layer one. Utilizing a two-layer model of a semi-infinite horizontally-layered medium, the study explores the influences of skin, subcutaneous fat, and muscle activity on electrical impedance signals. This model allows describing the effects of internal and external compression of the electrode system by changing the thickness of the skin-adipose layer. As result the behavior of bioimpedance signals during muscle contraction is better described by a two-layered semi-infinite model, emphasizing the importance of considering more complex models for an adequate inverse electrical impedance problem solution. Changes in the resistance by blood flow and respiration can be disregarded. The results of the studies provide an idea of the mechanisms of forearm EIM signal formation during muscle contraction for prostheses or human-machine interfaces.

Kobelev A.V., Briko A.N., Shchukin S.I. Horizontally layered mathematical models of forearm biotissues for electrical impedance measurements. Biomedicine Radioengineering. 2025. V. 28. № 5. P. 35–39. DOI: https:// doi.org/10.18127/j15604136-202505-08 (In Russian)

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