What is the minimum inter-electrode distance required for an ECI recording?

For ECI (Electrocorticography), the minimum inter-electrode distance is crucial in ensuring that the recordings are reliable and accurately represent the underlying brain activity. A distance of 10 cm is commonly recommended because it balances the need for spatial resolution with the goal of minimizing cross-talk between electrodes. This distance helps to ensure that recordings from different electrodes reflect distinct areas of cortical activity, thereby providing clearer insights into neural processes.

In practice, if the inter-electrode distance is too small, you risk picking up signals from neighboring electrodes, which can lead to contamination of the data. Having electrodes spaced too far apart may miss localized brain activity. Therefore, a distance of 10 cm is optimal for capturing brain signals without interference, making it the most suitable choice for ECI recordings.