What is the minimum bandpass required for an evoked potential system?

The minimum bandpass required for an evoked potential system is crucial for accurately capturing the relevant signals while filtering out noise and artifacts. A bandpass range of 0.1-5000 Hz is appropriate because it ensures that both low-frequency and high-frequency components of the evoked potential signals are recorded effectively.

This broad range allows for the inclusion of all necessary frequencies associated with various types of evoked potentials—such as visual, auditory, and somatosensory. Low-frequency cutoffs, such as 0.1 Hz, are important to detect slow onset or long-latency components of the signal. Higher frequency cutoffs, like up to 5000 Hz, are essential to capture fast changes relevant to neuromonitoring and to reflect high-frequency activities within the brain.

In contrast, narrower bandpass options may limit the ability to detect essential evoked potential components or could introduce distortion of signals, thus potentially compromising the integrity of neurophysiological monitoring during surgical procedures. Therefore, the wider bandwidth of 0.1-5000 Hz serves to optimize the detection and interpretation of these critical signals.