Bevelled Dual-Channel Microelectrodes
- 1 November 1974
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Biomedical Engineering
- Vol. BME-21 (6), 482-485
- https://doi.org/10.1109/tbme.1974.324337
Abstract
Preparation of bevelled dual-channel glass microelectrodes is described. The bevelled tips overcome some of the problems which complicate intracellular recording. The size of the tip opening is increased, resulting in a lower resistance, which in turn confers greater current-carrying capacity and less noise susceptibility. Bevelling also preserves the sharp point, facilitating tissue penetration and minimizing neuronal trauma. The characteristics of bevelled and unbevelled electrodes filled with 0.5 or 3 M KCI, K Acetate and K2SO4 were similar. Bevelled electrodes were shown to maintain a near constant resistance during current passage, while unbevelled ones showed changes in resistance that were dependent on current magnitude, polarity and duration. Such changes were caused principally by electro-osmosis.Keywords
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