How does electrode resistance affect EEG readings?

Electrode resistance plays a significant role in affecting the quality of EEG readings, and the correct choice is that it can cause signal distortion. High electrode resistance can introduce noise into the EEG signal, which can obscure the true electrical activity of the brain. When the resistance is too high, the impedance between the electrode and the skin increases, leading to a less accurate representation of the brain's electrical signals. This distortion can manifest as unwanted artifacts, making it difficult to interpret the underlying brain activity accurately.

Low impedance is desirable because it ensures a strong and clear connection between the electrodes and the scalp, resulting in high-quality signals that can accurately reflect the brain's electrical activity. Therefore, managing electrode resistance is crucial in obtaining reliable EEG data that can inform clinical decisions or research outcomes.