At what sensitivity would the largest possible waveform be represented without distortion in EEG?

The largest possible waveform in an EEG representation is significant for ensuring accurate interpretation and analysis of brain activity. Sensitivity in EEG refers to the vertical scale of the waveform representation, measured in microvolts per millimeter (µV/mm). A higher sensitivity value allows smaller electrical signals to be recorded more clearly without distortion.

The correct selection indicates that 100 µV/mm is an optimal sensitivity setting to avoid distortion of the largest waveforms. When sensitivity is set at this level, it balances the need to capture the range of brain activities being measured, including both small and large amplitude signals.

At 100 µV/mm, the apparatus is capable of portraying more significant fluctuations in brain activity without cutting off or compressing larger waveforms, which could lead to misinterpretation of the data. Higher sensitivities, such as 200 µV/mm, might risk missing critical changes in lower amplitude signals or creating distortion in larger amplitude signals, while lower sensitivities would not adequately capture the largest waveforms.

Therefore, setting the sensitivity at 100 µV/mm ensures both clarity and fidelity of the EEG signals, allowing for a comprehensive understanding of the brain's electrical activity without the risk of distortion.