NDLI: A VLSI-based system for localization of extracellular potentials

Content Provider	IEEE Xplore Digital Library
Author	Wolpert, S. Osborn, M.J. O'Neill, A.M.
Copyright Year	1994
Description	Author affiliation: Dept. of Electr. Eng., Maine Univ., Orono, ME, USA (Wolpert, S.; Osborn, M.J.; O'Neill, A.M.)
Abstract	An interface between a biological nerve fiber and an arbitrary electromechanical device was implemented using an analog VLSI-based amplifier/filter circuit. A silastic cuff was fitted over a live nerve bundle, and an electrode of Teflon coated silver wire was used to sense extracellular potentials. A dedicated CMOS VLSI-based circuit then filtered and amplified those signals to an amplitude appropriate for triggering an arbitrary circuit such as the four-phase stepper motor used in this study. In circuit tests, the amplifier/filter circuit was capable of sensing signals as low as 50 microvolts in an in vitro preparation of the optic nerve of Limulus polyphemus, and effect rotation of the four-phase stepper motor with detected impulses. Using a silastic cuff electrode and dedicated VLSI circuitry for compactness and reliability, this circuit has excellent long term potential as a component of a surgically implanted system. It is also a pivotal first step in the implementation of a comprehensive cybernetic interface.<>
Starting Page	972
Ending Page	973
File Size	225465
Page Count	2
File Format	PDF
ISBN	0780320506
DOI	10.1109/IEMBS.1994.415239
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1994-11-03
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Extracellular Electrodes Circuit testing Optical filters Nerve fibers Electromechanical devices Optical fiber amplifiers Silver Wire Optical fiber filters
Content Type	Text
Resource Type	Article

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