Multichannel EEG with novel Ti/TiN dry electrodes

• Type: Article in International Scientific Journal
• Date: 2015

Authors

Fiedler, P (Author) Other; Griebel, S (Author) Other; Pedrosa, P (Author) Other; C. Fonseca (Author) FEUP; Vaz, F (Author) Other; Zentner, L (Author) Other; Zanow, F (Author) Other; Haueisen, J (Author) Other

Journal

Title: Sensors and Actuators, A: Physical

Vol. 221

Pages: 139-147

ISSN: 0924-4247

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 45 Citations

Scopus - 51 Citations

Other information

Authenticus ID: P-00A-1YT

DOI: 10.1016/j.sna.2014.10.010

Abstract (EN): Research using multichannel electroencephalographic recordings is increasingly characterized by greater numbers of electrodes. With up to 256 silver/silver chloride (Ag/AgCI) electrodes, preparation and electrode placement is time consuming and error prone. We propose a novel type of dry titanium/titanium nitride (Ti/TiN) electrode, integrated into a novel electroencephalography (EEG) cap based on pneumatic-driven mechanisms. The electrodes were characterized electrochemically and comparative biosignal measurements were carried out. In a NaCl solution, the impedance values were between 824 and 54 ohm and the phase values between 52 and 100 at frequencies between 5 Hz and 10 kHz for the Ti/TiN electrodes. For resting-state EEG, and with eye movements, alpha activity, and pattern reversal visual evoked potential (VEP), there were no significant differences between adjacent novel Ti/TiN and standard Ag/AgCI electrodes in 97.2% of the signal episodes investigated. The potential maps for pattern reversal VEP were similar with both types of electrodes. In conclusion, our novel cap system based on Ti/TiN electrodes and pneumatic-driven mechanisms enables completely dry EEG acquisition and can thus potentially replace conventional Ag/AgCI electrodes due to similar signal quality.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9