What is the recommended impedance level for EEG and EOG?

The recommended impedance level for EEG and EOG is typically around 5k ohms. Maintaining this level of impedance is crucial for ensuring the quality of the signal being recorded. Low impedance values allow for better signal clarity and reduce the likelihood of noise interfering with the data collected from these important neurophysiological measurements.

In EEG, high-quality signals are crucial for accurate interpretation of brain activity, and too high an impedance can lead to signal degradation, making it difficult to differentiate between meaningful brain waves and artifact. Similarly, for EOG, which measures eye movements, having the correct impedance helps in clearly identifying the electrical activity associated with eye positions.

While other impedance levels may still allow for signal acquisition, they could compromise the integrity of the recordings, making it harder to diagnose or analyze conditions related to brain and eye functions. Thus, aiming for an impedance of around 5k ohms is the best practice in polysomnography.