Dynamic Clamp
Dynamic Clamp - Related Videos
06:42
Application of a NMDA Receptor Conductance in Rat Midbrain Dopaminergic Neurons Using the Dynamic Clamp Technique
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Cited by 5 •
2010
In this video, we demonstrate how to apply a conductance into a dopaminergic neuron recorded in the whole cell configuration in rat brain slices. This technique is called the dynamic clamp.
11:46
Implementing Dynamic Clamp with Synaptic and Artificial Conductances in Mouse Retinal Ganglion Cells
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Cited by 5 •
2013
This video article illustrates the set-up, the procedures to patch cell bodies and how to implement dynamic clamp recordings from ganglion cells in whole-mount mouse retinae. This technique allows the investigation of the precise contribution of excitatory and inhibitory synaptic inputs, and their relative magnitude and timing to neuronal spiking.
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.
08:34
Contribution of the Na+/K+ Pump to Rhythmic Bursting, Explored with Modeling and Dynamic Clamp Analyses
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Cited by 2 •
2021
Presented here is a method for investigation of the roles of the Na+/K+ pump and persistent Na+ current in leech heart interneurons using dynamic clamp.
09:43
Patch Clamp Electrophysiology
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2023
Neuron cell membranes are populated with ion channels that control the movement of charge into and out of the cell, thereby regulating neuron firing. One extremely useful technique for investigating the biophysical properties of these channels is called patch clamp recording. In this method, neuroscientists place a polished glass micropipette against a cell and apply suction to form a high resistance seal. This process isolates a small “patch” of membrane that contains one or more ion channels.
FAQs
The computer uses the recorded membrane voltage to update a conductance model and calculate the current that model would produce. That current is then delivered through the intracellular recording electrode, allowing the cell to experience a selected conductance during the experiment. Researchers can therefore examine how that added conductance changes neuronal excitability without permanently modifying the cell.
Rapid feedback keeps the injected current aligned with the neuron’s changing membrane voltage. This timing is essential when modeling conductances or synaptic inputs whose effects depend on ongoing electrical activity. If updates were substantially delayed, the calculated current could no longer match the cell’s present state, weakening the interpretation of how the modeled input shapes neuronal activity.
Researchers can introduce defined ion conductances or synaptic inputs while recording from the same living neuron. This separation makes it possible to examine the contribution of a particular electrical influence without permanently changing the cell’s native properties. Comparing activity with and without the modeled input helps identify how individual components contribute to excitability and cellular computation.
Dynamic Clamp adds a modeled conductance or synaptic input only during the intracellular recording, so the experimental manipulation remains controlled and reversible at the level described in the source material. That distinguishes it from approaches that permanently alter the cell. The temporary intervention supports direct comparisons of neuronal activity under different modeled conditions within hybrid neuron-computer experiments.
A typical workflow begins with intracellular recording from a living neuron while a computer continuously samples its membrane voltage. The computer then updates the selected conductance or synapse model, calculates the corresponding current, and sends that current back through the recording electrode. Repeating this cycle in real time creates the controlled feedback required for the experiment.
The essential elements are a living neuron, an intracellular recording arrangement, a computer running the conductance or synapse model, and a pathway for returning calculated current through the recording electrode. Their coordination allows voltage measurement, model updating, and current injection to occur continuously. The quality of the experiment depends on maintaining the real-time link among these components.
The technique is useful when researchers need to test how specific conductances or synaptic inputs shape neuronal activity while keeping the cell otherwise available for recording. It supports investigations of excitability and cellular computation at the single-neuron level, as well as network interactions through controlled hybrid neuron-computer experiments. These applications connect cellular electrical mechanisms with broader circuit behavior.
Dynamic Clamp experiments can reveal how selected electrical inputs influence neuronal activity and how those effects relate to excitability, cellular computation, or interactions within a network. The approach also provides a way to examine disease-related circuit mechanisms in a controlled setting. Its value comes from testing defined model components while observing responses directly in living neurons.