What sensitivity is recommended for ECI recordings?

In Electroencephalography (EEG), the sensitivity selected for the recordings is crucial as it determines how the electrical signals from the brain are visualized on the EEG output. For ECI (Electrocorticography or intracranial recordings), a sensitivity setting of 2 microvolts per millimeter (2µV/mm) is typically recommended. This sensitivity level strikes a balance, allowing for an adequate representation of the brain's electrical activity while ensuring that the lower amplitude signals can still be appreciated without overwhelming higher amplitude activities.

Setting the sensitivity at 2µV/mm helps in capturing more subtle changes in brain activity that may be important for clinical interpretation. Higher sensitivities could lead to the loss of detail in lower-amplitude activity, while much lower sensitivities might make the EEG harder to read due to excessive scaling of the signals. Therefore, 2µV/mm is chosen to maximize the clarity and diagnostic utility of the recordings in ECI settings.