To minimize interference from skeletal muscle, where should electrodes be placed?

• A. Avoid bony prominences or areas with significant movement
• B. Place on the forehead
• C. Place on bony prominences
• D. Attach to the upper arm only

Answer: (A)

Minimizing interference from skeletal muscle depends on placing the electrodes where there is little muscle activity and stable contact. Skeletal muscles produce electrical activity that can overwhelm or mask the signal you want to measure, and movements in areas with muscle use or near bony landmarks can lead to unstable contact and motion artifacts. By choosing locations that avoid bony prominences and regions of significant movement, you reduce these myogenic artifacts and obtain a cleaner, more reliable signal. That’s why the best approach is to place electrodes away from bones that stick out and away from areas that move a lot.