Related Experiment Video
Updated: Sep 2, 2025
Noninvasive EEG Recordings from Freely Moving Piglets
Published on: July 13, 2018
Water-soluble adhesive for stable long-term ambulatory EEG recordings
Ewan S Nurse1, Kristan Marlow2, Patrick J Hennessy2
1Seer Medical, Melbourne 3000, Australia; Department of Medicine, St. Vincent's Hospital Melbourne, University of Melbourne, Parkville 3052, Australia.
Objective:
Conventional methods used to adhere EEG electrodes are often uncomfortable. Here, we present a polymer-based water-soluble EEG adhesive that can be maintained for up to 6 days. The primary outcome measure of this study is the median electrode impedance at day 6.
Methods:
Impedance measurements for 841 EEG recordings using a 21 channel 10-20 configuration were remotely logged daily for 6 days after connection. A novel electrode adhesive was used to attach EEG electrodes. Patients were instructed to maintain their electrodes on day 4.
Results:
Median electrode impedances were significantly below 10kOhms for each day of recording, with a median value on day 6 of 4.18kOhms. Impedance values were significantly lower on day 5 than on day 4, demonstrating that the maintenance process can reduce impedance. Except for day 4-5, the median impedance increased each day. No significant difference was found on the first or final day between clinics or residences from areas of different geographic remoteness.
Conclusions:
EEG is able to be recorded in patients homes for 6 days with acceptable impedance and no significant effect of regionality or patients age.
Significance:
To the best of our knowledge, this is the first report in the literature of impedance data from long-term ambulatory EEG studies.
