At a sensitivity of 30μV/mm, how much voltage does 10mm of deflection represent?

The sensitivity setting of an EEG system is defined as the amount of voltage represented by each unit of measurement on the vertical axis of the EEG tracing, typically expressed in microvolts per millimeter (μV/mm). In this case, the sensitivity is set at 30μV/mm.

To determine how much voltage is represented by 10 mm of deflection, one needs to multiply the sensitivity by the amount of deflection. The calculation is as follows:

Voltage = Sensitivity × Deflection = 30μV/mm × 10mm = 300μV.

This means that a 10 mm deflection at a sensitivity of 30μV/mm corresponds to a voltage of 300μV. Therefore, the correct answer is that the voltage represented is 300μV.