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A simple method for beveling micropipettes for intracellular recording and current injection.
Pflugers Archiv : European Journal of Physiology
|March 11, 1977
Summary
A modified turntable effectively bevels microelectrodes for electrophysiology. Beveled electrodes may improve intracellular recordings by reducing noise and resistance.
Area of Science:
- Neuroscience
- Biophysics
- Instrumentation
Background:
- Intracellular microelectrodes are crucial for electrophysiological recordings.
- Achieving optimal electrode performance requires precise tip geometry.
- Existing beveling methods can be complex or costly.
Purpose of the Study:
- To develop a simple and accessible equipment for beveling intracellular microelectrodes.
- To evaluate the effectiveness of the beveled microelectrodes in electrophysiological recordings.
Main Methods:
- Modification of a conventional turntable.
- Use of an agar disc with ceric oxide polishing compound on a glass disc.
- Beveling of Pyrex single- and double-barreled micropipette electrodes (tip diameter > 0.1 µm).
Main Results:
- A functional beveling apparatus was successfully constructed.
- Beveled microelectrodes demonstrated reduced resistance, noise, and tip potentials.
- Improved quality of intracellular recordings, particularly during current injection, was observed.
Conclusions:
- The modified turntable provides a simple method for producing beveled microelectrodes.
- Beveled electrodes can enhance the quality of intracellular recordings, likely due to improved electrical properties.
- This technique offers a practical solution for researchers needing specialized microelectrodes.