Electrophysiology Techniques
Electrophysiology Techniques - Related Videos
10:46
Non-fluoroscopic Catheter Tracking for Fluoroscopy Reduction in Interventional Electrophysiology
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Cited by 4 •
2015
Radiation exposure is an underestimated risk in complex ablation procedures. Here, we describe a protocol to significantly decrease fluoroscopy time and dosage for both the patient and the lab staff by using a novel non-fluoroscopic catheter visualization system.
05:41
Applying Microfluidics to Electrophysiology
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Cited by 1 •
2007
Microfluidics can be integrated with standard electrophysiology techniques to allow new experimental modalities. Specifically, the motivation for the ...
08:22
Simultaneous fMRI and Electrophysiology in the Rodent Brain
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Cited by 45 •
2010
We have developed a method for simultaneous functional magnetic resonance imaging and electrophysiological recording in the rodent brain, providing a platform for the investigation of the relationship between neural activity and the blood oxygenation level dependent (BOLD) MRI signal.
11:31
Electrophysiological Recording in the Drosophila Embryo
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Cited by 6 •
2009
Electrophysiological recordings from Drosophila embryos allow analyses of developing muscle and neuron electrical properties, as well as characterization of functional synaptogenesis at the glutamatergic neuromuscular junction and central cholinergic and GABAergic synapses.
04:20
Amphotericin-B Mediated Perforated Patch-Clamp Analysis: An Electrophysiological Technique to Study Ionic Currents in Urinary Bladder Cells
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2023
This video demonstrates the characterization of cationic currents from transient receptor potential melastatin type 4 (TRPM4) ion channels in detrusor smooth muscle cells using amphotericin-B mediated perforated patch-clamp technique. The technique helps evaluate the biophysical and pharmacological properties of ion channels.
FAQs
Patch-clamp recording isolates a cell membrane so electrical currents associated with ion channels can be quantified while voltage or current conditions are controlled. This arrangement links a measured current to membrane electrical behavior more directly than a recording from many cells. It is useful for examining how cellular excitability changes when channel function is altered by mutation or drug exposure.
Patch-clamp experiments may control voltage or current, and that choice determines which electrical variable is held under experimental control. Measuring ion-channel currents under controlled voltage emphasizes current behavior, whereas controlling current focuses the experiment on electrical responses under a defined current condition. Selecting the appropriate mode helps match the recording to the biological question.
Extracellular electrodes detect action potentials or field potentials from groups of cells rather than isolating one cell membrane. This broader sampling connects collective electrical activity with tissue-level behavior, while patch-clamp measurements provide more focused information about membrane currents. Using the two scales together can help relate cellular mechanisms to coordinated activity in neural, muscular, or cardiac tissue.
Mutations or drugs can alter electrical excitability, and electrophysiology techniques reveal those effects through changes in measured currents, action potentials, or field potentials. Patch-clamp measurements are suited to membrane and ion-channel effects, whereas extracellular recordings show how altered activity appears across groups of cells or tissues. This comparison helps connect a molecular change with a functional biological outcome.
Researchers first choose an electrode configuration that matches the biological scale of interest, such as patch clamp for an isolated membrane or extracellular electrodes for grouped activity. They then establish the relevant voltage or current conditions and record electrical responses. The resulting measurements can be interpreted at the level of ion-channel currents, action potentials, field potentials, or tissue behavior.
Patch clamp is appropriate when the experiment requires focused measurement of currents associated with a cell membrane and ion channels. Extracellular electrodes are used when the goal is to capture action potentials or field potentials from groups of cells. The choice therefore depends on whether the study prioritizes membrane-level detail or broader tissue-level electrical activity.
They are used to investigate neuronal signaling, muscle and cardiac function, and sensory processing. The same approaches also support studies of how mutations or drugs change electrical excitability. Because measurements can span ion-channel currents, action potentials, and field potentials, researchers can examine both electrical mechanisms within cells and their relationship to larger biological functions.