3D Printing Neuron Equivalent Circuits: An Undergraduate Laboratory Exercise.

Area of Science:

• Neuroscience
• Biophysics
• Educational Technology

Background:

• The electrical equivalent circuit of a neuron models its passive electrical properties.
• Traditional exercises for modeling these properties require electronics knowledge, limiting practical application in biomedical courses.
• Existing methods often remain conceptual or computer-based, lacking hands-on engagement.

Purpose of the Study:

• To develop an accessible, hands-on laboratory experiment for teaching neuronal electrical properties.
• To create a cost-effective setup for demonstrating real-time current changes in neuronal circuits.
• To enhance student engagement in neurophysiology through practical experimentation.

Main Methods:

• Utilized a desktop 3D printer and conductive paint to construct the electrical equivalent circuit.
• Employed an Arduino UNO microcontroller as a graphical oscilloscope for real-time data acquisition.
• Integrated the Arduino with a standard computer for data visualization.

Main Results:

• Successfully built a portable and easy-to-assemble experimental setup.
• Demonstrated real-time monitoring of current flow through the circuit via graphical display.
• Achieved a significant cost reduction compared to commercial oscilloscopes.

Conclusions:

• The proposed method offers a practical and engaging alternative for teaching neuronal electrical properties.
• This approach bridges the gap between theoretical concepts and hands-on laboratory experience in biophysics education.
• The low-cost, portable setup facilitates widespread adoption in classroom settings.