|
|
|
Electric Field Analysis of Pt/Ir Microelectrode Array for Visual Prosthesis
|
SUI Xiaohonga,HAN Zhaolongb,SHAO Yibina,ZHOU Daib,REN Qiushia
|
(a.School of Life Sciences and Biotechnology; b.School of Naval Architecture,
Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China)
|
|
|
|
Abstract Finite element method was employed to simulate the electric field distributions of a Pt/Ir microelectrode array for opticnerve visual prosthesis. Spatial electric field distributions of microelectrodes with different lengths were analyzed under monopolar and bipolar microcurrent excitements. The effectiveness of the Pt/Ir microelectrode array was validated by an experiment on animals. According to the simulation results, when under a 100 μA current stimulation monopolarly and bipolarly, the maximum points of the electric density all locate at the interface of the Pt/Ir material and the insulation. And as the maximum electric field point being the center, the radius of the effective space under monopolar and bipolar stimulations is approximately 21 and 24 μm, respectively.
|
|
Received: 18 June 2009
Published: 28 September 2010
|
|
|
|
|
|
| No related articles found! |
|
|
|
|
