In identifying benign rolandic epilepsy, which electrode from the 10-20 system is particularly useful?

In the context of identifying benign rolandic epilepsy, the electrode CP1 from the 10-20 system is particularly useful due to its placement over the central region of the scalp, corresponding to the sensorimotor cortex. This area is closely associated with the sensorimotor functions of the mouth and face, which are commonly affected in benign rolandic epilepsy, also known as benign childhood epilepsy with centrotemporal spikes.

The characteristic spikes associated with this condition typically appear over the centrotemporal regions, which aligns with the location of the CP1 electrode. These spikes usually manifest during sleep and can be distinguished on an electroencephalogram (EEG), making the CP1 electrode crucial for capturing the typical electrical activity observed in patients with this type of epilepsy. By focusing on the central and parietal regions of the brain, which are important for motor and sensory processing, diagnostic accuracy is enhanced.

In contrast, the other electrodes mentioned focus on different areas of the brain that are less relevant to the specific seizure type associated with benign rolandic epilepsy. For instance, FP1 is located at the frontal region, T3 corresponds to the temporal area, and Pz is positioned centrally but more posteriorly over the parietal region,