[Modeling and experimental study on frequency-domain electricity properties of biological materials].
Frequency-domain electricity properties of four objects, including bullfrog skin, bullfrog muscle, triply distilled water and 0.9% NaCl, were tested in the range of 100Hz-10MHz using home-made electrode and measuring system. The experimental results showed that the resistance of 0.9% NaCl decreased dramatically, that the amplitude frequency characteristics of bullfrog's muscle and skin were similar, but that of triply distilled water did not change significantly. The frequency dependence of 0.9% NaCl showed that the electrode had great influence on the measuring system, so a new equivalent circuit model based on the electrode system was needed. These findings suggest that the new five-parameter equivalent circuit model, which embodies considerations on the interaction between electrodes and tissues, is a reasonable equivalent circuit for studying the electrical characteristics of biological materials.
Tian
Hua
H
Biomedical Information Engineering Department, Sichuan University, Chengdu 610065, China.
Luo
Shiqiang
S
Zhang
Rui
R
Yang
Gang
G
Huang
Hua
H
D000818:Animals; D025802:Electric Capacitance; D017097:Electric Impedance; D004560:Electricity; D004566:Electrodes; D018482:Muscle, Skeletal / Q000502:physiology*; D011893:Rana esculenta; D012867:Skin; D012965:Sodium Chloride
D012965:Sodium Chloride