Muscle artifact can be corrected by

Muscle artifact can be corrected by

• A. Decreasing the HFF
• B. Decreasing the LFF
• C. Moving the electrode that is the artifact is appearing on
• D. Either decreasing the HFF or moving the electrode that the artifact is appearing on

Answer: (D)

Muscle artifact is EMG noise that appears as rapid, high-frequency fluctuations on EEG. To correct it, you can reduce those fast components by lowering the high-frequency filter setting, which attenuates the high-frequency energy produced by muscle activity. Another effective approach is to move the electrode away from muscle sources, reducing how much muscle signal is picked up by that channel. Lowering the low-frequency filter doesn’t target the EMG frequencies and mainly affects slow drifts, so it isn’t a primary fix for muscle artifact. Therefore, both lowering the high-frequency filter and repositioning the electrode can reduce muscle artifact.

Muscle artifact is EMG noise that appears as rapid, high-frequency fluctuations on EEG. To correct it, you can reduce those fast components by lowering the high-frequency filter setting, which attenuates the high-frequency energy produced by muscle activity. Another effective approach is to move the electrode away from muscle sources, reducing how much muscle signal is picked up by that channel. Lowering the low-frequency filter doesn’t target the EMG frequencies and mainly affects slow drifts, so it isn’t a primary fix for muscle artifact. Therefore, both lowering the high-frequency filter and repositioning the electrode can reduce muscle artifact.