Figure 8.

Mean PC for 15 subjects with Alzheimer's disease and 13 control subjects with subjective memory complaints. Error bars indicate standard deviations. Results are the average of four epochs (average reference, epoch length 4,096 samples, 21 channels, digitally filtered between 13 and 30 Hz, sample frequency 500 Hz). Total: average of all pairs of 21 channels; intra_s: average of all short, intrahemispheric electrode pairs; intra_l: average of all long intrahemispheric electrode pairs; inter_s: average of all short interhemispheric electrode pairs; inter_l: average of all long interhemispheric electrode pairs. Details of the specific electrode pairs making up the four sub averages can be found in the methods section.