Figure 1.

An example illustrating the course of an experiment of induced hypoglycemia and the selection of EEG data for quantitative analysis. The plasma glucose level declines steadily (top panel), ultimately changing the characteristics of the recorded single-channel EEG as illustrated in the spectrogram (second panel). In the third panel, the gray boxes behind the raw EEG signal indicate the parts of data representing the normoglycemic and hypoglycemic state, respectively (30 min for normoglycemic and 5 min for hypoglycemia). The bottom panels shows average amplitude spectra, which serve the basis for the qEEG measures. The dashed lines indicate the EEG band splits