Decreasing the sensitivity would result in what change in the EEG waveform?

Decreasing the sensitivity would result in what change in the EEG waveform?

• A. Increase the height of the waveform
• B. Attenuate the lower frequencies
• C. Eliminate EKG artifact
• D. Decrease the height of the waveform

Answer: (A)

Sensitivity on an EEG display determines how much voltage is needed to move the trace by a given vertical distance. When you decrease sensitivity, the display scale becomes more magnified for the same brain activity, so the peaks and troughs appear higher on the screen. In other words, the waveform height increases because the tracing is amplified more by the reduced sensitivity setting. This adjustment changes the size of the waveform but does not alter its frequency content or remove artifacts; those would require filtering, lead management, or other techniques.

Sensitivity on an EEG display determines how much voltage is needed to move the trace by a given vertical distance. When you decrease sensitivity, the display scale becomes more magnified for the same brain activity, so the peaks and troughs appear higher on the screen. In other words, the waveform height increases because the tracing is amplified more by the reduced sensitivity setting. This adjustment changes the size of the waveform but does not alter its frequency content or remove artifacts; those would require filtering, lead management, or other techniques.