Membrane Potential Dye
Membrane Potential Dye - Related Videos
11:10
Membrane Potential Dye Imaging of Ventromedial Hypothalamus Neurons From Adult Mice to Study Glucose Sensing
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Cited by 8 •
2013
The activity of single neurons from adult-aged mice can be studied by dissociating neurons from specific brain regions and using fluorescent membrane potential dye imaging. By testing responses to changes in glucose, this technique can be used to study the glucose sensitivity of adult ventromedial hypothalamic neurons.
01:21
The Resting Membrane Potential
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2019
Overview The relative difference in electrical charge, or voltage, between the inside and the outside of a cell membrane, is called the membrane potential. It is generated by differences in permeability of the membrane to various ions and the concentrations of these ions across the membrane. The Inside of a Neuron Is More Negative The membrane potential of a cell can be measured by inserting a microelectrode into a cell and comparing the charge to a reference electrode in the extracellular...
02:38
Analysis of Calcium Dynamics and Membrane Potential Changes in a Mouse Arteriolar Endothelium
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2025
Source: Hakim, M. A. et al., Isolation and Functional Analysis of Arteriolar Endothelium of Mouse Brain Parenchyma. J. Vis. Exp. (2022).This video demonstrates the functional analysis of an arteriolar endothelial tube isolated from a mouse brain. It outlines the steps for measuring intracellular calcium levels and membrane potential, both at baseline and in response to pharmacological stimulation.
01:24
Resting Membrane Potential
0 Views •
2024
The relative difference in electrical charge, or voltage, between the inside and the outside of a cell membrane, is called the membrane potential. It is generated by differences in permeability of the membrane to various ions and the concentrations of these ions across the membrane. The Inside of a Neuron is More Negative The membrane potential of a cell can be measured by inserting a microelectrode into a cell and comparing the charge to a reference electrode in the extracellular fluid. The...
01:24
Resting Membrane Potential
0 Views •
2023
The relative difference in electrical charge, or voltage, between the inside and the outside of a cell membrane, is called the membrane potential. It is generated by differences in permeability of the membrane to various ions and the concentrations of these ions across the membrane. The Inside of a Neuron is More Negative The membrane potential of a cell can be measured by inserting a microelectrode into a cell and comparing the charge to a reference electrode in the extracellular fluid. The...
FAQs
The probes respond to electrical shifts across the cell membrane through changes in their distribution, orientation, or fluorescence. When membrane voltage changes, the resulting optical signal varies over time, allowing researchers to follow dynamic electrical activity without relying solely on direct electrical recordings. This mechanism links fluorescence measurements to cellular excitability.
Membrane potential dyes report whether the electrical state of a cell shifts during an experiment, including movement toward depolarization or hyperpolarization. Researchers interpret changes in fluorescence over time alongside the biological stimulus or activity being studied. This makes the approach useful for tracking voltage dynamics rather than simply measuring a static cellular condition.
Ion channels influence the electrical state of cell membranes, so changes in dye fluorescence can reveal how channel activity affects cellular voltage. By observing optical responses during cellular activity or pharmacological treatment, researchers can examine channel-related effects without restricting measurements to a single electrical recording. This supports studies of excitability and altered signaling.
Optical measurements provide a complementary view of membrane activity rather than replacing electrophysiology in every experiment. Their major advantage is the ability to monitor voltage-related changes across many cells simultaneously, while electrophysiological methods provide a different form of electrical measurement. Combining the approaches can broaden analysis of cell communication and coordinated activity.
Researchers apply the fluorescent probe to cells, monitor its optical signal over time, and relate fluorescence changes to cellular activity, membrane-voltage shifts, or an experimental treatment. The resulting time-dependent measurements can then be compared across conditions. This workflow supports noninvasive observation of dynamic excitability in populations of cells.
Applications include neuronal signaling, muscle activity, cardiac activity, and ion-channel function. The same optical strategy can also examine how pharmacological treatments alter cellular excitability. Because measurements can follow voltage-related changes across many cells, the method is suited to biological questions involving coordinated activity and communication within cell populations.
Membrane potential dyes help researchers observe altered membrane dynamics associated with cellular communication, disease mechanisms, or pharmacological exposure. Changes in fluorescence over time provide an optical readout of how cells respond under different conditions. This makes the approach relevant for comparing cellular states and evaluating effects on excitability or signaling.