2020/10/28 by James C. M. Hwang, Hwang, James C. M., Olivia Peytral-Rieu +1
Engineering · #Biological Physics (physics.bio-ph) #Cell Behavior (q-bio.CB) #FOS: Biological sciences #FOS: Physical sciences #Muscle activation and electromyography studies
paper · pdf · doi:10.48550/arxiv.2105.06428
openalex publication_date 2020/10/28 · openalex created_date 2021/05/24 · openalex updated_date 2026/07/28
The impedance of one cubic centimeter of living tissues of potato and guinea pig were measured from 500 Hz to 3 MHz. In general, the magnitude of the impedance was found to monotonically decrease with increasing frequency. This implies that the membrane of each cell in the tissue acts like a capacitor, which is in parallel with a membrane resistance. The membrane resistance and capacitance together are in series with a protoplasm resistance. Experimentally, it was observed that after the guinea pig died, the membrane resistance of its muscle decreased from 1.49 to 0.79 kilo-ohm while the protoplasm resistance remained around 0.11 kilo-ohm. By contrast, when the potato started to germinate, the protoplasm resistance decreased from 0.25 to 0.10 kilo-ohm, while its membrane resistance remained around 4 kilo-ohms.