Develop Bio- and MR-Compatible Polymer-Based Electrodes for Electroencephalography (EEG) Recording and Electrical Brain Implants


Iven Mareels;
Post Doctoral Research Fellow: Levin Kuhlmann.

Introduction: EEG is the art of recording electrical potentials from the brain. These potentials can be recorded from the scalp or intracranially. EEG is useful for studying how the brain works, diagnosing patients, or detecting neural events, like seizures.
Significance: This project will facilitate the development of polymer-based electrodes that are more bio- and MRI-compatible.
Applications: Develop bio- and MR-compatible polymer-based electrodes for electroencephalography (EEG) recording and electrical brain implants, through collaboration with Intelligent Polymer Research Institute (Wollongong) and St. Vincent's Hospital (Melbourne).
Challenges: Most current EEG electrodes are made of metal (stainless steel, titanium, platinum, silver, gold). Metal electrodes are not the most biocompatible materials, in that they do not interface well with brain tissue and have relatively high impedances. In addition, metal electrodes are not very compatible with magnetic resonance imaging (MRI). Even if the metals have weak magnetic properties they can still (1) distort the MR image, and (2) heat tissue through RF based effects. Moreover, the stronger the magnetic field strength in the MR scanner, the more significant these problems become.
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