Title :
Measuring the electric field of bioelectrodes in saline during stimulation
Author :
Ansari, U. ; Lovell, Nigel H. ; Suaning, Gregg J.
Author_Institution :
Grad. Sch. of Biomed. Eng., Univ. of New South Wales, Sydney, NSW, Australia
fDate :
Aug. 28 2012-Sept. 1 2012
Abstract :
In order to provide effective vision in a retinal prosthesis, it is necessary to provide sufficient phosphene quantities ideally by parallel stimulation of multiple electrodes. A common, limiting factor in parallel stimulation is the occurrence of cross talk, which can cause undesired tissue stimulation leading to inconsistent percepts. In this paper we present a system developed for measuring the electric field in an in vitro environment by stimulation of bioelectrodes immersed in an electrolyte. The results from this study provides a better understanding of the electric field generated by stimulating electrodes. Calculation of activation area can provide useful information in regards to electrode separation to eliminate cross talk during parallel stimulation.
Keywords :
bioelectric potentials; biomedical electrodes; biomedical measurement; crosstalk; electric field measurement; electrolytes; eye; prosthetics; activation area; cross talk; effective vision; electric field measurement; electrode separation; electrolyte; multiple electrode parallel stimulation; phosphene quantity; retinal prosthesis; saline; stimulating bioelectrodes; tissue stimulation; Electric potential; Electrodes; Microscopy; Neurons; Prosthetics; Retina; Voltage measurement; Electric Stimulation; Electrochemical Techniques; Humans; Implantable Neurostimulators; Microelectrodes; Models, Neurological; Prosthesis Design; Sodium Chloride; Visual Prosthesis;
Conference_Titel :
Engineering in Medicine and Biology Society (EMBC), 2012 Annual International Conference of the IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4244-4119-8
Electronic_ISBN :
1557-170X
DOI :
10.1109/EMBC.2012.6346054
