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Updated: Dec 10, 2025
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Voltage-sensitive Dye Recording from Axons, Dendrites and Dendritic Spines of Individual Neurons in Brain Slices
Published on: November 29, 2012
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Optical Studies of Action Potential Dynamics with hVOS probes
Yihe Ma1, Peter O Bayguinov1, Meyer B Jackson1
1Department of Neuroscience, University of Wisconsin - Madison.
Current Opinion in Biomedical Engineering
|September 1, 2020
Summary
The hybrid voltage sensor (hVOS) technique effectively detects action potentials in brain slices, offering high temporal fidelity and detailed waveform characterization for neural circuitry studies.
Area of Science:
- Neuroscience
- Biophysics
- Optical Imaging
Background:
- Action potential detection and waveform characterization are crucial for evaluating voltage sensors.
- The utility of voltage sensors in neural circuitry studies depends on their ability to report action potentials accurately.
- Optical imaging offers a powerful tool for studying neural activity.
Purpose of the Study:
- To evaluate the hybrid voltage sensor (hVOS) technique for detecting and characterizing action potentials.
- To assess the suitability of hVOS imaging for studying neural circuitry.
- To demonstrate the capability of hVOS in capturing action potential dynamics.
Main Methods:
- Utilized the hybrid voltage sensor (hVOS) technique for optical voltage sensing.
- Applied hVOS imaging to intact brain slices.
- Targeted hVOS probes to genetically-defined neurons and axons using cre-lox technology.
Main Results:
- hVOS imaging detected action potentials in intact brain slices with an excellent signal-to-noise ratio.
- Optical action potentials recorded via hVOS recapitulated voltage recordings with high temporal fidelity.
- hVOS recordings accurately reflected expected differences in action potential duration across neuron types and captured dynamic waveform changes in axons.
Conclusions:
- The hVOS technique is well-suited for optical studies of action potentials due to its rapid response and high signal-to-noise ratio.
- hVOS imaging provides a valuable tool for investigating neural circuitry and action potential dynamics.
- This method enables detailed characterization of action potentials, including propagation and plasticity, in genetically-defined neurons.
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