A simple and inexpensive device for applying a calibration pulse when performing intracellular recording

Area of Science:

• Neuroscience
• Biophysics

Background:

• Accurate calibration of intracellular recordings is crucial for reliable electrophysiological data.
• Conventional calibration methods can be complex or costly.

Purpose of the Study:

• To describe a simple, low-cost device for calibrating intracellular DC recordings.
• To ensure accurate amplitude and time measurements in electrophysiological experiments.

Main Methods:

• A device utilizing an optically coupled current source and a 1-ohm resistor to ground was developed.
• Current pulse amplitude and duration were controlled via a conventional stimulator's voltage output.

Main Results:

• The device facilitates precise calibration of intracellular DC recordings.
• The 1-ohm resistor effectively minimizes background noise and DC shifts.

Conclusions:

• This device offers a straightforward and economical solution for calibrating intracellular recordings.
• It improves the quality and reliability of electrophysiological data acquisition.