What is the maximum acceptable electrode impedance for EEG and EOG recordings according to guidelines?

The maximum acceptable electrode impedance for EEG and EOG recordings is set at 5000 Ohms, which reflects a standard recommendation in the field of polysomnography. Maintaining an impedance level below this threshold ensures that the electrical signals captured from the scalp and eyes are clear, minimizing noise and enhancing the quality of the recordings. High impedance can lead to signal distortion, thereby affecting the accuracy of the data collected during sleep studies.

The guidelines emphasize the need for low impedance to ensure optimal signal transmission, which is especially critical when recording brain waves and ocular movements. This careful attention to electrode impedance aids in achieving reliable and valid results in polysomnographic assessments, making it an essential aspect of proper technique in this field.