When input 1 is more negative than input 2, how does the EEG amplifier respond?

When input 1 is more negative than input 2, the EEG amplifier produces an upward deflection on the recording. This outcome is based on how the EEG system interprets voltage differences between the two inputs. In an EEG setup, the amplifier detects the difference in electrical potential between two electrodes. If one electrode (input 1) has a more negative voltage than the other (input 2), the amplifier shifts the output signal upward on the display.

This mechanism is fundamental to understanding EEG signals, as it allows clinicians and researchers to visualize brain wave activity. The upward deflection indicates that the reference point (input 2, in this case) is more positive compared to input 1, signaling an increase in electrical activity at that particular location in the brain. This is critical for interpreting EEG patterns related to various neurological activities and conditions.