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Technologue

Exp Neurobiol 2018; 27(1): 57-64

Published online February 28, 2018

https://doi.org/10.5607/en.2018.27.1.57

© The Korean Society for Brain and Neural Sciences

Development of Electrical Neural Stimulator Generating Periodic and Non-periodic Signals and Supporting Closed-loop Experimental System

Hyejin An and Hyun-Chool Shin*

Department of Electronic Engineering, Soongsil University, Seoul 06978, Korea

Correspondence to: *To whom correspondence should be addressed.
TEL: 82-2-828-7165, FAX: 82-2-821-7653
e-mail: shinhc@ssu.ac.kr

Received: January 18, 2018; Revised: February 19, 2018; Accepted: February 23, 2018

It is essential to build a system to generate proper neural stimulus signals with adjusting parameters. We developed a stimulator with up to four channels for separate settings in periodic and non-periodic modes. The device can support a closed-loop experimental system which utilizes neural information in real time as a feedback for controlling stimuli. To confirm whether stimulating signals are properly produced and delivered inside the brain, two experiments with rats were conducted. We observed that the change of firing rates and the cross-power spectral density increased after stimulation which meant that electric signals were transferred well and that they affected the neurons' activities. Thus, it is expected that the stimulator can be utilized to produce appropriate stimulation signals in accordance with various objectives.

Graphical Abstract


Keywords: stimulator, brain stimulation, electrical stimulation, neuron, closed-loop system