Bridging as implied by Hjorth electrical distances (note large difference between males and females):

Impedances (generally higher impedances for males):

Male/Female impedance differences:

Mean log-transformed power values in band 1-44 Hz based on six (3 eyes-open, 3 eye-closed) one-minute resting baseline recordings.  Values mapped in column two are from 6 active electrodes (24,3,37,105,60,86; AF3/4,C3/4, and PO3/4) and those in column four all 128 electrodes active recorded immediately following low density recordings.  Column three shows low density minus high density values and column five shows electrolyte bridging as indicated by low Hjorth electrical distances.  Values in column six are the mean power difference for six electrodes.

Power plots for subject 4/F/L: