Fig. (5).

The number of EEG channels which are characterized by the same type of SP within the same observation. Data averaged across 10 EEGs (4 randomly selected subjects). Notice that the sum is 133.5%. This is because several groups of EEG channels which are characterized by different SP types can be observed simultaneously during a single observation. For example, during one observation two EEG channels can be characterized by SP of type X, another two channels - by SP of type Y and another 3 channels - by SP of type Z.