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Electric and Magnetic Field Devices for Stimulation of Biological Tissues

Electric and Magnetic Field Devices for Stimulation of Biological Tissues

Published on: May 15, 2021

Low-cost computer-controlled current stimulator for the student laboratory.

Burak Güçlü¹

¹Biomedical Engineering Institute, Boğaziçi University, Istanbul, Turkey. burak.guclu@boun.edu.tr

Advances in Physiology Education

|June 15, 2007

Summary

This study introduces a low-cost, computer-controlled electrical stimulator for physiology education. The versatile device enables accurate nerve and muscle stimulation, enhancing the learning experience and maximizing the performance-to-cost ratio in laboratory settings.

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Area of Science:

Physiology
Neuroscience
Biomedical Engineering

Background:

Electrical stimulation is crucial for teaching physiology concepts.
High costs of traditional stimulators limit student laboratory access.
Need for affordable, versatile, and computer-controlled stimulation devices.

Purpose of the Study:

To design and validate a low-cost isolated electrical stimulator for physiology education.
To enable computer control of nerve and muscle stimulation using readily available hardware.
To improve the performance-to-cost ratio in physiological laboratory teaching.

Main Methods:

Developed a voltage-to-current converter circuit for the stimulator.
Integrated the device with computer analog-output channels (e.g., audio) for control.
Tested electrical characteristics including dynamic range and pulse-width capabilities.
Demonstrated practical application via frog sciatic nerve stimulation.

Main Results:

The stimulator costs approximately $100 (U.S.) and is computer-controllable.
Capable of producing accurate monopolar/bipolar current pulses, pulse trains, and arbitrary waveforms.
Achieved a dynamic range of 46 dB and a pulse-width range of 0.1-10 ms.
Successfully stimulated frog sciatic nerve and recorded compound action potentials.

Conclusions:

The designed current stimulator is a flexible and effective educational tool.
Offers a high performance-to-cost ratio, increasing learning efficiency.
Facilitates hands-on physiological experiments with accessible technology.