Impedance as a method to sense proximity at the electrode-retina interface

Aditi Ray; Leanne Lai-Hang Chan; Alejandra Gonzalez; Mark S. Humayun; James D. Weiland

doi:10.1109/TNSRE.2011.2169428

Impedance as a method to sense proximity at the electrode-retina interface

Aditi Ray, Leanne Lai-Hang Chan, Alejandra Gonzalez, Mark S. Humayun, James D. Weiland

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

31 Citations (Scopus)

Abstract

Precise positioning of a stimulating electrode in the eye is not possible by simple visualization. However, reliable measurement of responses to retinal stimulation requires consistent positioning. The present study focuses on impedance measurement techniques to sense the proximity of the electrode to the retina. A platinum-iridium stimulation electrode was placed inside the rat eye and impedance was recorded at different positions of the stimulating electrode relative to the retina. The presence of robust electrically evoked response in the superior colliculus indicates that the electrode may not have to be in absolute contact in order to elicit a neural response. Optical coherence tomography imaging confirmed the distance-impedance relationship. © 2006 IEEE.

Original language	English
Article number	6034529
Pages (from-to)	696-699
Journal	IEEE Transactions on Neural Systems and Rehabilitation Engineering
Volume	19
Issue number	6
DOIs	https://doi.org/10.1109/TNSRE.2011.2169428
Publication status	Published - Dec 2011
Externally published	Yes

Research Keywords

Electrical stimulation
impedance
optical coherence tomography (OCT)
retina
superior colliculus

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10.1109/TNSRE.2011.2169428

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abstract = "Precise positioning of a stimulating electrode in the eye is not possible by simple visualization. However, reliable measurement of responses to retinal stimulation requires consistent positioning. The present study focuses on impedance measurement techniques to sense the proximity of the electrode to the retina. A platinum-iridium stimulation electrode was placed inside the rat eye and impedance was recorded at different positions of the stimulating electrode relative to the retina. The presence of robust electrically evoked response in the superior colliculus indicates that the electrode may not have to be in absolute contact in order to elicit a neural response. Optical coherence tomography imaging confirmed the distance-impedance relationship. {\textcopyright} 2006 IEEE.",

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AU - Ray, Aditi

AU - Chan, Leanne Lai-Hang

AU - Gonzalez, Alejandra

AU - Humayun, Mark S.

AU - Weiland, James D.

PY - 2011/12

Y1 - 2011/12

N2 - Precise positioning of a stimulating electrode in the eye is not possible by simple visualization. However, reliable measurement of responses to retinal stimulation requires consistent positioning. The present study focuses on impedance measurement techniques to sense the proximity of the electrode to the retina. A platinum-iridium stimulation electrode was placed inside the rat eye and impedance was recorded at different positions of the stimulating electrode relative to the retina. The presence of robust electrically evoked response in the superior colliculus indicates that the electrode may not have to be in absolute contact in order to elicit a neural response. Optical coherence tomography imaging confirmed the distance-impedance relationship. © 2006 IEEE.

AB - Precise positioning of a stimulating electrode in the eye is not possible by simple visualization. However, reliable measurement of responses to retinal stimulation requires consistent positioning. The present study focuses on impedance measurement techniques to sense the proximity of the electrode to the retina. A platinum-iridium stimulation electrode was placed inside the rat eye and impedance was recorded at different positions of the stimulating electrode relative to the retina. The presence of robust electrically evoked response in the superior colliculus indicates that the electrode may not have to be in absolute contact in order to elicit a neural response. Optical coherence tomography imaging confirmed the distance-impedance relationship. © 2006 IEEE.

KW - Electrical stimulation

KW - impedance

KW - optical coherence tomography (OCT)

KW - retina

KW - superior colliculus

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DO - 10.1109/TNSRE.2011.2169428

M3 - RGC 21 - Publication in refereed journal

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JO - IEEE Transactions on Neural Systems and Rehabilitation Engineering

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ER -

Impedance as a method to sense proximity at the electrode-retina interface

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Research Keywords

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