Title :
Low-Impedance Capillary Electrode for Wide-Band Recording of Membrane Potential in Large Axons
Author :
Fishman, Harvey M.
Author_Institution :
Department of Biological Sciences, State University of New York, Albany, N.Y. 12222.
Abstract :
An electrically floating platinized-platinum (Pt-Pt) wire within the length of a long (3-cm) electrolyte-filled glass capillary (100¿ diam), which is used to monitor the internal potential in large axons, eliminates cable effects and lowers the effective electrode impedance to < 10 k¿. With this low-source-impedance capillary electrode; absolute transmembrane potentials can be recorded and a fast-responding (0.5-¿s) voltage-clamp system is obtained.
Keywords :
Biomembranes; Electrodes; Glass; Impedance; Monitoring; Nerve fibers; Platinum; Voltage; Wideband; Wire; Axons; Electrodes; Membrane Potentials; Platinum;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
DOI :
10.1109/TBME.1973.324235
