Voltage-sensitive Dyes
Voltage-sensitive Dyes - Related Videos
09:36
Optical Imaging of Neurons in the Crab Stomatogastric Ganglion with Voltage-sensitive Dyes
0 Views •
Cited by 4 •
2011
Here we present the methodology for fast and high resolution fluorescent voltage-sensitive dye imaging of detailed activity of neurons in the crab stomatogastric ganglion.
03:10
Optical Recording of Neuronal Activity in Brain Slices Stained with a Voltage-Sensitive Dye
0 Views •
2025
This video demonstrates a procedure for observing changes in neuronal activity in a brain slice stained with a voltage-sensitive dye. The dye reflects changes in the neuron's membrane potential by altering its fluorescence intensity. Through the application of electrical stimuli and advanced imaging techniques, this process enables visual tracking of real-time changes in neuronal membrane potential based on VSD fluorescence.
10:30
Dye-sensitized Solar Cells
0 Views •
2023
Source: Tamara M. Powers, Department of Chemistry, Texas A&M University Today's modern world requires the use of a large amount of energy. While we harness energy from fossil fuels such as coal and oil, these sources are nonrenewable and thus the supply is limited. To maintain our global lifestyle, we must extract energy from renewable sources. The most promising renewable source, in terms of abundance, is the sun, which provides us with more than enough solar energy to fully fuel our...
12:51
Voltage-sensitive Dye Recording from Axons, Dendrites and Dendritic Spines of Individual Neurons in Brain Slices
0 Views •
Cited by 13 •
2012
An imaging technique for monitoring of membrane potential changes with sub-micrometer spatial and sub-millisecond temporal resolution is described. The technique, based on laser excitation of voltage-sensitive dyes, allows measurements of signals in axons and axon collaterals, terminal dendritic branches, and individual dendritic spines.
14:23
Optical Recording of Electrical Activity in Guinea-pig Enteric Networks using Voltage-sensitive Dyes
0 Views •
Cited by 10 •
2009
This protocol illustrates how voltage-sensitive dyes enable optical recording of electrical activity from intact neural networks such as the plexuses of the guinea-pig enteric nervous system, with an adjustable resolution that ranges from single-cells to multi-ganglionic circuitry.
FAQs
The key transduction step occurs at the lipid bilayer. When membrane voltage changes, it alters the electric field surrounding the membrane-embedded molecule. That field change modifies the dye’s optical behavior, so a voltage event can appear as a measurable change rather than requiring direct electrode access. This coupling links electrical activity to fluorescence or absorbance signals and allows depolarization and repolarization to be followed optically.
Voltage changes may be tracked through fluorescence intensity, excitation characteristics, or emission spectra, depending on how the dye responds. These readouts describe different optical consequences of the same electrical perturbation: altered brightness or altered spectral behavior. Distinguishing among them helps researchers interpret whether an observed signal reflects a change in intensity, excitation, or emitted light during cellular electrical activity.
Compared with electrode recordings, voltage-sensitive dyes can provide an optical view across broader cell populations and tissue regions. That spatial coverage is valuable when researchers want to follow how activity propagates through neuronal networks or examine coordinated electrical behavior in heart and muscle tissue. The approach is especially useful where electrode recordings are limited, while preserving rapid responses to voltage changes.
Rapid temporal responses allow optical signals to follow fast changes associated with depolarization and repolarization. Consequently, measurements can reveal the timing and spread of action-potential propagation rather than only indicating that a tissue is active. This temporal capability complements the method’s spatial coverage in studies of network dynamics and excitable tissues, where both the location and progression of activity matter.
Researchers can monitor optical responses across many neurons and compare where and when signals change. The resulting spatial pattern can show how an action potential propagates through a population, extending observation beyond a single recording location. This makes the approach useful for examining network dynamics, including how activity is organized across neuronal groups and how propagation changes during biological studies.
In heart and muscle tissue, optical voltage measurements can be used to examine excitability, meaning how electrical activity is generated and propagated in these excitable tissues. Their broad spatial view helps researchers assess activity across tissue rather than relying only on a localized recording. This supports biological studies of coordinated electrical behavior in cardiac and muscular systems.
Beyond measuring immediate electrical activity, the method supports studies of development, disease mechanisms, and pharmacological effects. Researchers can use spatially distributed optical signals to examine how electrical behavior changes across cells or tissues in these contexts. This makes the technique valuable not only for describing normal network or tissue activity, but also for relating altered voltage dynamics to broader biological questions.