An electroplating-free and minimal noise polyimide microelectrode for recording auditory evoked potentials from the Epicranius

Jeong Hun Kim, Inho Song, Seung Min Lee, Ho Seok Choi, Hangjin Byeon, Inyoung Kim, Sang Hoon Lee

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

In this paper, we introduce an electrode for measuring auditory evoked potentials by employing the advantages of polyimide (PI), which is a well-known substrate material for producing flexible electrodes using MEMS technology. The PI multimicroelectrode array has four fingers that include 16 electrodes in order to achieve sufficient adhesion to the curved surface of the animal skull. For high-quality signal acquisition, we optimized the device to decrease crosstalk and improve contact impedance by adding ground channels and fabricating a raised electrode structure. In addition, implantation of the device was facilitated by the addition of an alignment site to ensure optimal positioning and enable signal measurement from the specific part of the cerebral cortex in charge of auditory sensing. After the implantation of the PI electrode on the skull surface, electrical signals were measured following stimulation at different stimulus frequencies (5 or 10 kHz). Unlike other techniques, administration of this PI electrode is less invasive, reducing patient recovery time dramatically in comparison with other electrocorticographic operations. Furthermore, as the exterior of the brain would not be exposed at any point, the chance of infection is minimized.

Original languageEnglish
Article number6522498
Pages (from-to)3425-3431
Number of pages7
JournalIEEE Transactions on Biomedical Engineering
Volume60
Issue number12
DOIs
Publication statusPublished - 2013 Dec 1

Keywords

  • Auditory evoked potential
  • epicranial EEG
  • multichannel electrode array
  • polyimide (PI) electrode

ASJC Scopus subject areas

  • Biomedical Engineering

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