What is the recommended range for interelectrode impedances during ECI recording?

The recommended range for interelectrode impedances during ECI (Electroencephalogram Impedance) recording is indeed typically between 100 to 10,000 ohms. This range is important for ensuring good signal quality and accurate readings.

When impedances fall within this range, it indicates that the electrodes are functioning well and that there is minimal noise introduced into the recorded signals. Impedances that are too high can lead to poor signal quality, making it difficult to accurately interpret brain activity. Conversely, impedances that are too low can cause issues such as excessive current flow, which might saturate the recording and lead to distortion in the data.

This range helps maintain a balance where the electrodes provide a reliable and stable connection with minimal artifacts, thus yielding clearer EEG data that is essential for effective analysis and diagnosis.