What is the most common spacing of electrode disks on a 4-point intracranial strip?

The most common spacing of electrode disks on a 4-point intracranial strip is 1 cm. This spacing is typically chosen to provide a balance between adequate sampling and resolution of the electrical brain activity being monitored. A spacing of 1 cm allows for effective detection of localized electrical signals while minimizing the potential for crosstalk between adjacent electrodes.

In intracranial monitoring, the overall goal is to accurately capture brain potentials and electrical activity that is relevant to understanding various neurological conditions. Too wide of a spacing might miss important variations in activity, while too close spacing could result in overlapping signals that are difficult to interpret. Thus, the 1 cm spacing is practical, as it provides sufficient coverage for capturing the dynamics of brain activity across the monitored area.