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The neurodyne: a simple mains-powered constant-current stimulus isolator
J Millar1, T G Barnett, S J Trout
1Department of Physiology, Queen Mary and Westfield College, London, UK.
Journal of Neuroscience Methods
|November 1, 1994
Summary
This study introduces the Neurodyne, a constant-current, mains-powered stimulator for neuroscience research. It effectively minimizes stimulus artifacts in neuronal tissue experiments, offering a practical alternative to battery-powered devices.
Area of Science:
- Neuroscience
- Biomedical Engineering
Background:
- Electrical stimulation is crucial for neuroscience experiments.
- Minimizing stimulus artifacts requires constant-current and isolated stimulators.
- Battery-powered devices are typically used to achieve this isolation.
Purpose of the Study:
- To develop a mains-powered stimulus interface that is both constant-current and electrically isolated.
- To provide a versatile device capable of delivering analogue signals and pulses for neuronal stimulation.
Main Methods:
- Design and construction of a novel stimulus interface ('Neurodyne') utilizing a toroidal transformer.
- Implementation of constant-current circuitry and full electrical isolation from ground.
- Testing the device with analogue signals and pulses up to 20 mA with >100 V compliance.
Main Results:
- The Neurodyne successfully provides constant-current and isolated electrical stimulation from mains power.
- The device can deliver both analogue signals and pulses for versatile stimulation applications.
- Satisfactory performance was demonstrated in in vitro brain slice preparations.
Conclusions:
- The Neurodyne offers a simple, constructible, and effective solution for mains-powered neuronal stimulation.
- It overcomes the limitations of battery-powered devices by providing isolation and constant current.
- This interface is suitable for various neuroscience research applications requiring precise electrical stimulation.