One possibility to apply the modular -concept is to use different arrangements within one cap.
The graphic shows as an example an arrangement by Dr. Th. Weiss, Dept. of Psychology, Friedrich-Schiller-University Jena. On the one hand it comprises a full 10%-system with 61 channels, and alternatively SSEP-recordings from above the sulcus centralis with 61 channels placed according to a 5%-system are possible.