What is the relationship between voltage, sensitivity, and deflection according to EEG principles?

The relationship between voltage, sensitivity, and deflection in EEG principles can be understood through the foundational equation that relates these three variables. Voltage refers to the electrical potential difference measured by the EEG electrodes. Sensitivity is a parameter of the EEG machine, indicating how effectively it amplifies the voltage readings, while deflection represents the resulting visual output on the EEG strip or digital display that corresponds to the voltage detected.

When considering these relationships, each statement provided reflects a version of the fundamental concept in EEG interpretation. Voltage is indeed equal to sensitivity multiplied by deflection, which emphasizes that for a given level of deflection on the EEG trace, increasing sensitivity will result in greater voltage being recorded. Similarly, stating that deflection equals voltage divided by sensitivity indicates the inverse relationship between these two, showing how the visual representation on the EEG will change based on the sensitivity setting of the device. Furthermore, sensitivity can also be expressed as voltage divided by deflection, confirming its role as a measure of amplification.

Thus, all these equations and relationships are valid representations of how voltage, sensitivity, and deflection interact within the context of EEG recording, leading to the conclusion that all of the proposed relationships are correct. Understanding these principles is crucial for accurately interpreting EEG data and for making