Increasing the gain would result in what change in the EEG waveform?

Increasing the gain would result in what change in the EEG waveform?

• A. Decrease the height of the waveform
• B. Attenuate the high frequencies
• C. Increase the height of the waveform
• D. Eliminate slow wave artifact

Answer: (C)

Gain is the amplification applied to the EEG signal by the amplifier. When you increase gain, all voltages are multiplied, so the waveform deflections become taller on the recording. This is why the height of the waveform increases with higher gain. It doesn’t inherently change which frequencies are present or remove artifacts; those come from filtering or artifact management, not simply turning up the gain. If gain is set too high, the signal can saturate and clip, distorting the waveform, but the fundamental effect of increasing gain is to make the waveform taller.

Gain is the amplification applied to the EEG signal by the amplifier. When you increase gain, all voltages are multiplied, so the waveform deflections become taller on the recording. This is why the height of the waveform increases with higher gain. It doesn’t inherently change which frequencies are present or remove artifacts; those come from filtering or artifact management, not simply turning up the gain. If gain is set too high, the signal can saturate and clip, distorting the waveform, but the fundamental effect of increasing gain is to make the waveform taller.