Neuronal Excitability
Neuronal Excitability - Related Videos
02:29
External Excitation of One-Dimensional Patterned Neuronal Cultures
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2025
This video demonstrates a technique for stimulating line-patterned neuronal cultures with a uniform, unidirectional electric field.
03:06
Studying the Excitability of Fluorescent Neurons using a Whole-Cell Patch Clamp
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2025
The video demonstrates a method to study the excitability of neuronal cells expressing fluorescent protein using a whole-cell patch current clamp. In the current-clamp mode, action potentials indicative of neuronal excitability are generated.
10:49
In Utero Electroporation Approaches to Study the Excitability of Neuronal Subpopulations and Single-cell Connectivity
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Cited by 10 •
2017
This manuscript provides protocols that use in utero electroporation (IUE) to describe the structural connectivity of neurons at the single-cell level and the excitability of fluorescently labeled neurons. Histology is used to characterize dendritic and axonal projections. Whole-cell recording in acute slices is used to investigate excitability.
05:01
Inducing Long-Term Plasticity of Intrinsic Neuronal Excitability in Neurons of the Dorsal Lateral Geniculate Nucleus
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2024
Here, we describe a protocol for inducing long-term plasticity of neuronal intrinsic excitability in relay neurons from the dorsal lateral geniculate nucleus maintained in ex vivo brain slices.
08:44
Dynamic Clamp Methods to Investigate Impaired Neuronal Excitability Associated with Autism
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2025
Dynamic clamp electrophysiology can establish causal links between neuronal firing deficits and ion channel dysfunction. We describe dynamic clamp methods and protocols in mouse cerebellar Purkinje neurons, noting useful resources and technical considerations. In a representative study, we add modeled sodium conductance to Tsc1-/- Purkinje neurons to rescue repetitive firing.
FAQs
Ion gradients establish different concentrations of charged particles across the neuronal membrane, creating the conditions for membrane-potential changes. Voltage-gated sodium and potassium channels then regulate how those charges move when the membrane is stimulated. Their controlled opening links the existing gradients to electrical signaling and determines how strongly the cell responds to incoming information.
The threshold marks the membrane-potential level at which a stimulus produces an action potential rather than a smaller change. Reaching it indicates that channel activity has generated sufficient membrane depolarization for the electrical event to proceed. This makes threshold a key point for analyzing whether neuronal inputs will produce a propagated signal.
Synaptic inputs provide information that neurons integrate before producing an electrical response. The combined influence of these inputs affects membrane-potential changes and can determine whether threshold is reached. Studying this integration helps explain how individual neurons transform incoming signals into outputs that contribute to coordinated activity within nervous-system circuits.
Changes in ion gradients or in the regulated opening of voltage-gated sodium and potassium channels can modify how a neuron responds to stimulation. Because these features control membrane-potential changes and threshold crossing, they influence electrical signaling. Drugs that alter neural signaling can therefore be investigated for their effects on neuronal excitability.
Researchers examine neuronal excitability by measuring or modifying the electrical responsiveness of nerve cells. These approaches can reveal how ion gradients, channel regulation, and synaptic integration affect signal generation. The resulting information supports analysis of neural communication and helps researchers evaluate how altered excitability relates to disease processes or drug effects.
In biology, excitability studies connect cellular electrical behavior with muscle activity and functional neural circuits. In disease-oriented research, measuring or modifying this property can support investigations of epilepsy, pain, and neurodegeneration. The same framework also helps assess drugs that alter neural signaling, linking channel activity and membrane responses to broader nervous-system outcomes.